Can You Deduce The Chess Position?

Рет қаралды 118,955

Жыл бұрын

** TODAY'S PUZZLE **
Yesterday we featured on the most amazing sudokus we've ever seen (Dragonsnake by Agent) and today we get to do it all again. This is an extraordinary hybrid puzzle of sudoku and chess where the solver's task is to deduce the current state of a chess game and, in doing so, solve the sudoku. It's by Christian König and it's called Ein Echtes Schachsudoku. [You will need to know the rules of chess to solve this puzzle!]
You can try it at the link below:
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Rules:
Right now we are in the middle of a game of chess. There have been some moves made by standard chess rules, but neither a capture nor a castling have yet taken place. Also, every piece has been moved at most once. Every piece carries a digit from 1 to 8 as shown in the initial grid - this digit must appear in the current cell of the piece in the game we're part way through. In the current game position, the whole grid can be filled with digits from 1 to 8, such that every digit appears in every row, column and box exactly once! Can you discover the current chess position and solve the sudoku?
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Пікірлер: 699

@cejotka_ Жыл бұрын

I'm unbelievably honored by your nice words about my puzzle! The origin of the puzzle name indeed comes from "chess sudoku", but it's more unfamiliarity than uncomfortableness: A friend of mine asked for a chess sudoku and I wasn't aware of that expression for an anti-knight sudoku (the name under which I knew this puzzle type up to that point), so I wanted to try something more unique and came up with this idea :) And yes, you got the main idea of the puzzle exactly right ;) Thank you a lot for featuring this puzzle on your channel!

@bristolrovers27 Жыл бұрын

Terrific puzzle - amazing setting

@_raumplaner6575 Жыл бұрын

I'm super thrilled this puzzle was featured. Since it's one of my all time favourites ✨️

@alunb7965 Жыл бұрын

I never comment on videos at all, but this puzzle was sublime. I'm genuinely baffled as to how this was created; I like to think I'd set up an actual chess board and work from there but I genuinely have no idea. Thanks for your time and effort with this, loved it.

@abrodeur Жыл бұрын

Was there particular opening to set up the board?

@pandagirl7144 Жыл бұрын

I decided to do this puzzle because I really like Chess sudokus and this was subliminal I absolutely loved it a lot of the deduction it was so good it was so fun

@18lolable Жыл бұрын

1:23:48 I love how Simon does the most complicated sudoku logic, only to stumble at 16-3=15 at the end 😄

@highpath4776 Жыл бұрын

All we need know is a 9 x 9 chess game into a more conventional suduko grid

@highpath4776 Жыл бұрын

( shall we have one more pawn and the Kings Mistress ?

@fabian9072 Жыл бұрын

@@highpath4776 Shogi is uses a 9x9 board, so you could do it with shogi instead of chess

@Jivvi Жыл бұрын

@@highpath4776 I've seen a variant with two queens, but the knight and bishop were swapped on one side, because you need bishops on opposite colours.

@8bitdaydream Жыл бұрын

At the end of the puzzle the Knight on g1 has to move to f3 to block the the bishop on g4 checking the king on e2. Brilliant!!

@ShabbaDabb Жыл бұрын

Thanks for explaining that fairly clearly. Take a bow!

@8bitdaydream Жыл бұрын

With Sudoku notation: At the end of the puzzle the Knight on R8C7 has to move to R6C6 to block the the bishop on R5C7 checking the king on R7C5. :D

@Sam_weiqi Жыл бұрын

Correct :-)

@TehFirefly Жыл бұрын

another way to think of it: the "top" player has made 14 moves while the "bottom" player has only made 12 moves if the knight is stationary, so it *must* have moved!

@Teddyknockou Жыл бұрын

This is the answer because the rules state it’s “in the middle of a game” and if the Knights isn’t on g1 then it’s checkmate

@legoinsomniac Жыл бұрын

Normally I am just watching these with slack jawed awe and never have any moments of seeing things Simon missed but something about the combination of rules hit my brain just right and there was a lot of times I found myself desperately waiting for Simon to notice what I had seen.

@TheGuyCalledX Жыл бұрын

The 1s were so frustrating!!! They could've been disambiguated so early into the solve and he's just ignoring sudoku logic haha

@aous9679 11 ай бұрын

The 3 in box 4 , the one in box2 and the obvious pawn moves in box 5 😬😬😬

@frisbeedan8905 6 ай бұрын

I had the same thing happen (for the first time watching his videos) and I think it had something to do with the amount of information that was presented. It's really easy to get distracted with a puzzle like this!

@chameleon_yura Жыл бұрын

Yes, chess players do have an advantage in this puzzle. For instance, the second we know that Bg5 and d3 were the moves, we know that the bishop from f1 can't go left, because pawns from d2 and e2 can't both let them go (because of the move order). Also, experienced chess players think about the queen on h4 giving a check immediately, even without thinking. Totally enjoyed solving this puzzle several months ago! And glad to see how it's much easier to solve with the multi-color line tool.

@robinblackwell8167 Жыл бұрын

Absolutely! Simon is usually much better at these puzzles than I am, so watching him repeatedly trying to castle his queen through his rook was pure catharsis!

@PrometheanConsulting Жыл бұрын

@aous9679 11 ай бұрын

Where/how can i find these puzzles before they are featured into ctc?

@chameleon_yura 11 ай бұрын

@@aous9679 no-one knows in advance which puzzles will be featured. But most of the setters (especially in the CTC community) publish their puzzles to the site called "Logic Masters Germany" ("Rätselportal" in German). Note: when you open the first link that you find in Google search, you may think that you opened the wrong site because it looks like it was created in 1990 by a scholar. No, that's the right one.

@oneeyedman4431 Жыл бұрын

The most original puzzle I have ever seen on this channel, and that’s against a lot of competition. Brilliant Christian, thank you. Nice solve Simon, as always 😊

@LithmusEarth Жыл бұрын

The Schrödinger's cell puzzle, is the one I still want to re-watch. I just was really glad to see something quirky, that was a reference to the channel's quirks. There was one, where it was almost entirely cages except like 2-3 spaces, and every single cage had like the sums 3-30 or something like that, all of the sums, thought that was cool, but yes, the unique-ness here is pretty unparalleled, this would definitely be top 5 if not top 3 and I'm only 20 minutes into it.

@relvoi7493 Жыл бұрын

Hikaru after looking at the puzzle for 5 seconds: Well this is completely winning for white.

@danielyuan9862 Жыл бұрын

Well duh, because white played Ke2.

@siddharth_desai Жыл бұрын

The logic that resolved the white king's position involving the order of the pieces... I am in awe! Brilliant deductions by Simon and brilliant setting by Chris!

@thecaneater Жыл бұрын

His "logic" just turned out to be a lucky guess. The puzzle is solved without that leap in logic. I solved it without that convolution.

@timosteinsteiger7289 Жыл бұрын

@@thecaneater Just because it also solves without that logic doesn't mean it is a lucky guess. The rules state that there is a game of chess being played. Chess follows rules and using that knowledge still results in logical conclusions, not just guesses...

@roelandtube 11 ай бұрын

Not fully sure if I'm correct, but in order to conclude the king moves to e2, you need pawn e2-e3. But this blocks this bishop c1- f5. So if the bishop comes first, that means the black Queen is already there, so the king never escapes the check and the moves are always illegal...?

@teeksi 11 ай бұрын

@@roelandtube The move order could have been Qh4(only move for black), Bg5, Pe3, Ke2 and lastly Pf4 1:04:40

@_raumplaner6575 Жыл бұрын

When I first solved this puzzle many months ago I had to use two different grids and a chess board. One grid for Sudoku. One grid to mark which pieces stay put or have to move and the chess board to keep track of the moves. It's absolutely amazing Simon could do this all in one grid.

@chameleon_yura Жыл бұрын

Totally agree, multi-colors lines changed everything

@tetraedri_1834 Жыл бұрын

I did the puzzle without lines, just by colouring the pieces that had moved. Because of that I wasn't able to disambiguate the final 46-pairs as I didn't remember that it was the pawn that was occupying the 6 in box 4 :D

@melinaalba63 Жыл бұрын

I do believe that this should be the start of a whole new Sudoku kategory. I could never do this myself but watching it was so incredibly fun! And maybe if more people would do puzzles like this, Sven could Upgrade the App to make it easier :D

@HaitiLeonidas Жыл бұрын

I am afraid of Phistomefel getting his hands on this puzzle and adding his Phistomefel rings on a fully chess boarded Sudoku. If Christian and Phistomefel were to work together....

@Censeo Жыл бұрын

@@HaitiLeonidas don't be afraid. You are not solving them. Only Simon needs to be afraid

@gamerbb2 Жыл бұрын

I was thinking the same thing. The elements of chess and sudoku meshed so well that this would be enjoyable over and over again

@yerelnimniavny4948 Жыл бұрын

So normally the software simplifies the process of solving puzzles, but this magnificent puzzle is just much more accessible using actual pieces of chess.

@pelahnar4 Жыл бұрын

I could definitely see that making it easier to understand what's going on. Realizing the black queen would be putting the white king in check, for example, would be much clearer if the queen weren't represented by a 3 that's connected to a queen by a line.

@sarahnash7174 Жыл бұрын

I'm still at under an hour into the watch and so far have made 3 deductions. 1. This is a beautiful but very convoluted puzzle! 2. I was 💯 percent correct in seeing the solve time and deciding to just watch you rather than attempt myself! 3. (Though this one I already knew) you are INCREDIBLE!

@samplename5159 Жыл бұрын

Oh no their queen! It's really fun and congrats to Simon for solving it in movie time, definitely a hard one if one's chess skills are rusty :) There were a few extra interesting things that were missed: 15:40 move Bg5 (5) has to come after d3 (5) but before the e pawn (2) moves (if it does at all) because it can only go to e3, which means the white lightsquare bishop on f1 never gets the chance to move on the f1-a6 diagonal further than e2 already, and when later g2 pawn (7) is determined to stay still we know the bishop (4) stays in box 8. 1:04:00 some unusual deductions, but not unlike any other variant - the knight on g1 (8) can now only end up on g1 or f3, any cell seeing those two squares cannot be 8, namely r5c7 and r6c7. 1:23:35 16-3=15??

@amysteele2488 Жыл бұрын

Yes! This is the real chess sudoku puzzle I've really wanted someone to make for so long. Thank you Christian, take several bows!

@Orenotter Жыл бұрын

That Christian is simply the best, For how could one ever detest A puzzle this clever? And how could you ever Beat mixing sudoku and chess?

@wolffang21burgers Жыл бұрын

The ordering of the moves was actually quite restricted. In particular these moves have to occur in this relative order: ...e5 ...Qh4 Bg5 e3 Ke2 f4 ...Bg4 & Nf3 ...f5 ...Nf6 & ...Kf7 ...Rc8 Which spans 10 out of 13 of black's turns

@narlano05 Жыл бұрын

Yeah, black has a lot of moves that collide with each other when done in the wrong order. Thank you for typing them out :P

@chitraagarwal8259 Жыл бұрын

This is exactly what i also attempted to do after watching the puzzle.. I was wondering if this is how someone good at chess would attempt to solve it too (instead of looking first at sudoku constraints)

@ronjohnson6916 Жыл бұрын

Super impressed that Simon was able to scan the grid after a few pencil marks. Very confusing.

@violetasuklevska9074 Жыл бұрын

Illegal moves didn't come to my mind when solving this, but it's incredible that they managed to be relevant. Christian take a bow! This is truly a one-of-a-kind puzzle! Sidenote: other than move count, the knight must move to f3 (r6c6) to block the attack from the bishop to the king Edit: I'm currently getting sidetracked with the question: "Through how many differnet move orders can you achieve this position?" Stick around here for who knows how long to find out the answer. And the answer is 43,710,624. That didn't take as long as I had expected.

@aurorasodre2375 Жыл бұрын

I am commenting just to see if this ever gets an update!

@robinbrown6530 Жыл бұрын

You know, I finished this puzzle but thought the knight moving/not moving was unresolved by the final solution. Thank you for pointing out the blocked checked before I came down here and made a fool out of myself. lol

@AhsimNreiziev Жыл бұрын

Like Aurora, I too am commenting in hopes of this one day getting an update.

@7rollface Жыл бұрын

It has to move to block the check, but if it's the last move then we can't say whether or not it actually *did*. The snapshot that we're seeing could be from just before that happened.

@violetasuklevska9074 Жыл бұрын

@@7rollface It can't be the last move however: f5 Nf6 Kf7 Rhc8 are four moves that come afterwards

@charliemcadams07 Жыл бұрын

Simon, I love the long videos. This , for me, was the greatest of them all. The final force of the Knight move was just amazing. A whole new level of genius. Koenig, you are a master. Well done.

@rickanderson1913 Жыл бұрын

40 seconds in and i'm hooked - what a genius of a puzzle 🙂

@laurasmith2173 Жыл бұрын

I would love to see more of these!

@Slayer666th Жыл бұрын

Yes, as someone who plays chess since the age of 6, i just had mental images in my head where each chess piece stays once i placed it at its final destination. For example it helped me see the 3 in r7c3 directly without even thinking about it.

@RADZIO895 Жыл бұрын

3 in r7c3?

@laurynasmerkelis2370 Жыл бұрын

As some already commented, the knight has moved, for the same reason that you deliberated if the black Queen was checking the white King. Lovely puzzle. Well done Christian for constructing and Simon for solving.

@Gradanmor Жыл бұрын

Another reason why the knight in r8c7 had to move was that the bishop in r5c7 was giving check to the white king in r7c5 and this could not have been the most recent move, because the black pawn in column 6 moved after the black bishop. So the knight had to block the check.

@keyaanmatin4804 Жыл бұрын

Now I want to see Simon and Mark play chess against each other

@lucaleccese6436 Жыл бұрын

Me too

@tangrybird04 Жыл бұрын

That will literally be a 2 hour game lmao

@Anne_Mahoney Жыл бұрын

I'd love to see that. Simon is so good at spatial perception -- but Mark has more of the competitive killer instinct, I think, and would probably pull out some improbable brilliant sacrifice to win the game.

@peterkelley6344 Жыл бұрын

Yes, I would expect this to be more than one video session. Maybe work with the London Park System and do it in public. CtC goes public ...

@th.nd.r Жыл бұрын

IMPECCABLE. Two of the best sudokus of all time in a row. Just astonishing. Love the novelty of this ruleset, so many beautiful deductions, and brilliantly solved Simon, the fact that you’re well-versed enough in chess to get those parts is just awesome!!! PS: the 3 in the corner didn’t get its song! Oh also beautiful guitar playing as usual!

@MrRussianComrad Жыл бұрын

One could determine the position of the King-side bishop earlier! Since the queen side bishop has moved, it means the queen pawn has advanced one step forward. This restricts the king-side bishop to two places, one of which is occupied by the king. Hence, it must have stayed in place.

@cparks1000000 Жыл бұрын

Do you mean the f1 bishop?

@DeadDrunk2 Жыл бұрын

Watching him bounce between chess rules and sudoku rules were infinitely more entertaining than I could have hoped for! Brilliant puzzle!

@omdcho Жыл бұрын

This rule set was brilliant! I hope there were app that actually let you move chess pieces to make it more visually clarify.

@frenchfrythecool Жыл бұрын

I'm so impressed that a puzzle like this was able to be created. Crazy amounts of logic and love must have gone into setting this

@inspiringsand123 Жыл бұрын

Let's Get Cracking: 06:10 Simon's time: 1h16m39s Puzzle Solved: 1:22:49 What about this video's Top Tier Simarkisms?! Bobbins: 3x (27:35, 54:46, 1:15:22) Knowledge Bomb: 1x (15:35) Cooking with Gas: 1x (22:25) Maverick: 1x (07:44) And how about this video's Simarkisms?! Hang On: 45x (03:16, 06:24, 07:32, 09:05, 10:53, 11:55, 13:17, 16:44, 21:18, 22:25, 22:28, 25:00, 30:12, 31:29, 31:40, 31:40, 33:10, 33:10, 33:20, 33:57, 35:34, 36:13, 44:09, 46:33, 46:48, 46:52, 46:57, 48:50, 53:12, 53:12, 59:02, 59:28, 1:01:28, 1:01:28, 1:01:28, 1:01:40, 1:03:43, 1:13:46, 1:18:12, 1:19:55, 1:20:28, 1:23:24, 1:23:24, 1:23:24, 1:23:35) Ah: 25x (09:05, 09:05, 09:05, 21:03, 22:25, 25:00, 25:00, 32:11, 38:50, 39:21, 45:27, 46:30, 46:30, 51:04, 51:04, 53:03, 56:16, 1:08:03, 1:08:07, 1:13:54, 1:15:22, 1:18:56, 1:22:01, 1:23:30, 1:23:59) Sorry: 11x (11:17, 17:30, 18:08, 20:38, 22:58, 23:40, 53:48, 54:09, 54:30, 1:03:10, 1:10:54) Pencil Mark/mark: 8x (08:30, 23:44, 59:36, 1:04:11, 1:13:35, 1:16:04, 1:20:08, 1:22:22) Beautiful: 5x (14:46, 39:43, 39:43, 1:24:41, 1:25:51) By Sudoku: 5x (1:05:41, 1:12:57, 1:13:04, 1:15:04, 1:15:49) Good Grief: 4x (14:46, 19:56, 1:22:04, 1:22:04) Brilliant: 4x (01:30, 02:24, 30:19, 48:52) Obviously: 4x (01:00, 05:43, 16:40, 27:42) What on Earth: 3x (59:28, 1:20:33, 1:25:19) Clever: 3x (25:35, 30:09, 1:22:11) Progress: 3x (1:09:03, 1:13:42, 1:17:04) Goodness: 2x (07:15, 15:53) Break the Puzzle: 2x (10:26, 19:05) Deadly Pattern: 2x (1:19:51, 1:22:38) Shouting: 2x (03:52, 04:16) Wow: 2x (35:14, 1:14:24) What Does This Mean?: 2x (13:00, 24:02) Useless: 1x (57:28) What a Puzzle: 1x (1:22:51) Bother: 1x (1:16:04) Apologies: 1x (02:36) The Answer is: 1x (09:52) Stuck: 1x (1:06:35) Ridiculous: 1x (26:39) Take a Bow: 1x (1:26:25) Facetious: 1x (09:44) If I Trust my Pencil Marks: 1x (1:04:11) Disappointing: 1x (35:49) Unbelievable: 1x (00:56) In Fact: 1x (47:42) Intriguing: 1x (38:26) Plonk: 1x (1:04:22) Have a Think: 1x (05:27) Cake!: 1x (04:22) Most popular number(>9), digit and colour this video: Fifteen (3 mentions) Three (68 mentions) Red (13 mentions) Antithesis Battles: Even (6) - Odd (0) Black (10) - White (8) Row (30) - Column (24) FAQ: Q1: You missed something! A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn! Q2: Can you do this for another channel? A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!

@_J_A_G_ Жыл бұрын

I think there was ("as useful as a") "chocolate tea-pot" in there as well. Not sure if you have that in the filter yet, but it's a recurring Simonism (Simon Says?) that paints a clear picture for me.

@AhsimNreiziev Жыл бұрын

Seeing as which puzzle I'm commenting this on...... I'd love for you to make a program like this one for Agadmator's channel!

@4sent4 Жыл бұрын

Rules at 4:30

@bradleyemery Жыл бұрын

My notation was all highlighting: purple for pieces that didn't move, grey for where pieces used to be, and green for their new locations. I did spend a lot of time looking back and forth to see which greys and greens went together, but I think the reduced visual clutter compared to lines worked well for me.

@Jack-sy6di Жыл бұрын

I used green for pieces which I knew were moving, grey for not moving, and purple once I'd written the digit into the grid corresponding to where they moved to. I found I was able to keep track of who'd moved where from memory (and because only so many moves are legal)

@davidmays2660 Жыл бұрын

Awesome puzzle! I loaded final position into a lichess study and found some interesting things. 1. The knight must be on f3! - If the knight had stayed on g1, Black's bishop on g5 would have the White king in check, but also somehow be nestled in front of the pawn chain -- this position is impossible to achieve with normal play. 2. The position is completely winning for White -- but oddly close to drawn! Obviously, if play resumes normally from this position, White is completely winning because the black queen hangs on h4. However, if it were Black to play in this same position, the position becomes unclear after bxc4, counterattacking White's queen.

@mewangabory5961 Жыл бұрын

I've recreated the match, it's white's turn. But frankly, that's not a possible match at all, the moves are absurd (well the condition was that each piece only moves once so it's not unexpected)

@Sus7th Жыл бұрын

hm... can you link the lichess study in these comments? curious what it would look like.

@fabianvivasz 3 ай бұрын

As a chess Master I've got to say that I absolutely loved this puzzle! This is the perfect example of a chess sudoku. I especially liked the final touch of the knight having to move from g1 to f3 in order to block the check (and fit the move count). I can't imagine how someone can come up with something like this, but thanks a lot for taking the time to build it! Brilliant!!

@carstenkruse8527 Жыл бұрын

this has got to be one of the best setting of a suduko ever.....completion and perfect follow through on an idea. Almost a shame there wasn't a chessboard at the end, with the end position displayed

@wsshambaugh Жыл бұрын

I love that the final ambiguity about the knight moving isn’t necessary to solve to get the sudoku to mark as solved, but is necessary to fit the rules of chess. A wonderful mini-puzzle that acts as a fitting coda to a magnificent larger one.

@Senen33 Жыл бұрын

To add on the "black has moved 13 times so white have to have moved at least 13 times too", the knight needs to have moved to block the check on the white king by the g4 (r5c7) black bishop, as we know that bishop move is not the last move played, since black still has rook to c8 to play after that bishop move, so the check on the white king must be prevented in some way, and that is the only one that works.

@Jivvi Жыл бұрын

@@Senen33 The sudoku is still solved before working that out though, because both digits are 8s anyway.

@Senen33 Жыл бұрын

@@Jivvi Kinda depends on the order you make your deductions, knowing how many white pieces have moved can help solving some of the black spawn stuff. But yeah you don't need it for the solve.

@danielyuan9862 Жыл бұрын

@@Jivvi Technically, the description says you need to figure out the position as well.

@Jivvi Жыл бұрын

@@danielyuan9862 it's not a solve condition though, and there isn't even a way to enter it into the puzzle. It implies that knowing the exact position is necessary to solve the sudoku, but as he discovered, it actually isn't.

@mike2143 Жыл бұрын

This puzzle is a masterpiece. Chess and Sudoku have never been merged so smoothly. And congrats Simon, as usual!

@megalamb Жыл бұрын

Truly a brilliant puzzle! This was the first CTC feature where I watched the first few moments, then IMMEDIATELY went to solve the puzzle myself, and then returned to watch the rest of the video! :)

@danielauto3767 Жыл бұрын

That was 'out of the ball park' one of the best sudoku puzzles I ever solved. The way the sudoku rules interact with the chess rules is amazing. Instant classic!

@PepperKoi Жыл бұрын

72:47 Was so confused at the start because the only way I could see the black rook escaping box 2 (because the king was blocked from column 4 by the 3 pawn) was to go forward, but that would push the 5 pawn into box 4 as well which broke the white 5 bishop, which had to go to box 4 because the white 5 pawns took up boxes 5, 7, and 8. Was a eureka moment when I realized the rook could just go sideways, also proving that all the king side black pieces moved My favorite logic was when the white bishop blocked the black queen's path to her deduced spot, which meant it had been moved after the queen, proving that the king wasn't in check So many great moments like this. Loved this puzzle

@veganostra7388 Жыл бұрын

This puzzle format is absolutely glorious, so much fun to solve! I hope there will be more

@benoitranque7791 Жыл бұрын

This was lovely, I hope this variant shows up again!

@wallacexixctc7115 Жыл бұрын

I don't really know how to play chess but Simon's explaination and hypothecation are so comprehensive that he indicates all the possible moves that special piece therefore letting me understood the rules of chess in the process of Simon solving.

@tyfunk8614 Жыл бұрын

This was so cool! So entertaining and fun to follow. Movie length too which is always a plus!

@aishwaryaiyer7796 Жыл бұрын

this is so cool, we need more chess puzzles like this!!

@Rubrickety Жыл бұрын

I haven't tried the puzzle yet, but I gotta say, Simon looks _amazing_ in the thumbnail.

@chitraagarwal8259 Жыл бұрын

Hilarious!

@SarahArissa Жыл бұрын

Incredible puzzle from Christian and solve from Simon! One of my favourite Cracking the Cryptic videos of all time

@aere481 Жыл бұрын

Beautiful puzzle. I got stuck on the Black Queen check conundrum. Wonderfully done to Christian for setting and Simon to solving.

@emilywilliams3237 Жыл бұрын

I was away from home and could not watch this when it was first posted, so I watched it tonight. Guitar intro and outro - lovely. Thank you for that, Simon. And the puzzle and solve - my goodness, I could totally follow what you were doing, but there is no way I could ever do this, even understanding and, probably ,watching the video. You are really amazing when these complex logical phenomena are presented. Thank you so much!

@chicken9865 Жыл бұрын

very cute comment, I ageee - Simon, we are thankful for these wonderful videos! :)

@andersosterholm2538 Жыл бұрын

Incredibly impressive puzzle and solving, and a very entertaining video! Thank you Christian and Simon!

@raphaellfms Жыл бұрын

This is absolutely brilliant! I’m glad to live in this moment in time! I hope someone comes with a puzzle like this where 1 capture could have occurred, it sure would have incredible ramifications

@urbanhillebrand1861 Жыл бұрын

Thanks for the wonderful rendition of "Is there anybody out there" in the beginning :)

@giuseppelovarelli907 Жыл бұрын

Wonderful puzzle and wonderful solution! Congrats to both Chris and Simon for this incredibly clever sudoku

@davidrattner9 Жыл бұрын

Just an absolute sublime, outstanding, amazing puzzle!!! Loved everything about it !!

@mjkuhnke Жыл бұрын

Don't play chess or sudoku and generally just watch this channel since I find your voice soothing but somehow this puzzle just clicked for me and was able to do it super fast just in my head... Got me excited since I'm usually totally lost trying to follow your logic even with you thoroughly explaining it every time

@alexishunt525 Жыл бұрын

This puzzle was fantastic, but I have to say it was made way harder by the software not letting me hide the chess pieces and numbers to see my pencil marks. It's hard to read a 5 superimposed on an 8... Absolutely brilliant puzzle design, though, bravo!

@TomDonahue Жыл бұрын

Finally, after 3 days, and 3 restarts of this puzzle, I can finally watch this video. As a someone who loves chess I've never been so determined to solve one of these puzzles for myself first. This was a fantastic puzzle.

@Tringard Жыл бұрын

From an abstract view, the mechanic of being given a digit that fits along a line is very interesting. Made for a lot of interesting thought paths. So many markings used to keep track of things since it was so hard to read the numbers overlapping any pieces made for possibly my busiest grid in the end.

@coasafehold1033 Жыл бұрын

This is actually the first puzzle on the channel I’ve ever solved faster than Simon. A fantastic feeling

@christopherstark887 Жыл бұрын

Genial Christian, ein unglaublich schön konstruiertes Puzzle!! Und Simon, wieder einmal ein beeindruckender Lösungsweg. Ich brauchte 3 Stunden für dieses Meisterwerk!

@davidblake6889 Жыл бұрын

Absolutely brilliant, guys. Christian, thank you for the puzzle. Simon, thank you for the solve. It was incredible to watch you work through the chess logic, and then follow up with the sudoku. A unique puzzle in terms of skill of construction. A pleasure to watch you perform your magic as usual, Simon.

@thecaneater Жыл бұрын

Lovely puzzle. It was actually way easier and approachable than it first seems. Would love to see another of this ruleset.

@dsquirrel Жыл бұрын

These moves recreate the final position, though it makes for quite a bizarre game! 1. b4 e5 2. c4 Qh4 3. d3 a5 4. Bg5 b5 5. e3 d5 6. Ke2 Nc6 7. f4 Bg4+ 8. Nf3 f5 9. h3 Bd6 10. Rh2 Nf6 11. Qb3 Kf7 12. Nd2 Rhc8 13. Rd1 Rab8

@Merione Жыл бұрын

Good catch! Here's another one: 1. d3 d5 2. h3 e5 3. Rh2 Qh4 4. Bg5 Bd6 5. e3 Nc6 6. Ke2 Rb8 7. f4 Bg4+ 8. Nf3 f5 9. Nd2 Nf6 10. b4 Kf7 11. c4 Rhc8 12. Qb3 a5 13. Rd1 b5

@danielsharp2402 Жыл бұрын

The crazy thing is during recreation the engine spasms out but the actual position is almost no advantage for either side.

@AFastidiousCuber Жыл бұрын

@@danielsharp2402 The final position is +12 according to SF15.

@antonvalkenberg Жыл бұрын

This was an amazing puzzle to see solved and an absolute joy to watch!

@gabojill19 Жыл бұрын

This puzzle is just *chef´s kiss*. The only way I can think to make this...type(?)...more challenging is determining move order.

@joshbarling6761 Жыл бұрын

Loved watching the solve. I couldn't help but think that highlighting the pieces that need to move in green and and the pieces that stay still in red might have helped a lot to see which pieces you hadn't looked at yet and whether they needed to move or not. You could even highlight the square they move to in a different/same colour to help with the visualisation. Thanks for the lovely long video!

@sarahnash7174 Жыл бұрын

Loved it! What a puzzle, what a solve!!

@Spencerbane 10 ай бұрын

I almost never solve puzzles. But I will spend hours watching this channel.

@oliverwalden4334 Жыл бұрын

This was an amazing ride. When it dawned on me, that not just moves, but also the resolving position determined the placement of pieces, I finished quickly, but with my jaw dropped, in total amazement. Now I am waiting for a Go-Minesweeper-Sudoku hybrid…

@CrazyPierre89 Жыл бұрын

That - Was - Awesome! The puzzle as well as the solving!

@firstcitizen3681 Жыл бұрын

This is my first try on any non-classic sudoku. Got pretty far in 20min and was sure I could solve this before simon. But then I spent 80+ min wandering what on earth can I do next? Finally I gave up and came to watch the video. I don't think I could've figured out that illegal pawn move for king's check in a million years although I play average chess. The puzzle is absolutely mindblowing. Hats off to Chris.

@RolandTitan Жыл бұрын

Just saw the check logic. absolutely brilliant. this is now my favorite sudoku of all time.

@selenasilverstep7981 Жыл бұрын

Simon, there is ANOTHER way to know whether the knight on g1 moved. Can you see it? Black played Bg4! If white did not play Nf3 beforehand, Ke2 would have been illegal. (this is way cooler than counting moves IMO)

@dsquirrel Жыл бұрын

And you have to remember that Black has played f5 also, which had to come after Bg4. Otherwise the final move could be Bg4 with check.

@wolffang21burgers Жыл бұрын

Agreed partially. White cannot play Nf3 before Ke2. Can you see why?

@selenasilverstep7981 Жыл бұрын

@@wolffang21burgers Oh, right! Ke2 was before the f4 push! My bad, did not catch that.

@Coyotek4 Жыл бұрын

Heh ... I did it by counting moves. Nice alternate!

@jfb- Жыл бұрын

Great puzzle. The logic about the queen checking the king in particular was beautiful.

@sarahnash7174 Жыл бұрын

No apologies for last night needed, it was a great fun evening!

@francoisduez601 Жыл бұрын

Quite a crazy idea, but such a brilliant execution ! Amazing puzzle, to add to the list of absolute masterpieces!

@bertbergers9171 Жыл бұрын

Great puzzle btw! Thanks mister König!!

@clockworkkirlia7475 Жыл бұрын

My solution for this looked like a disco nightmare with all the colour-marks and lines I was drawing. I also needed to peek at the video to work out what to do with the top-right Rook when I got stuck, but after another roadblock with the mess of threes and forgetting that kings can move diagonally, I got it! Impressed with how clean your solution looks.

@conexant51 Жыл бұрын

Pure logic pawn! Jokes aside, I've had this thought on multiple occasions: A small text box in each cell would be nice in order to comparatively/sequentially number cells or write shorthand descriptions to clarify while solving. Also enable highlighting for this feature and for both corner and centre pencil marks and full colour palettes for the highlighting.

@gagstersps3 Жыл бұрын

Great puzzle. I was stuck for so long, then decided to watch the video. When you talked about how the white couldn't put itself in chess when pushing the pawn, my mind was blown and suddenly all the last pieces fell into place.

@LixLorn Жыл бұрын

Didn't solve this on my own, but a short while into the video I thought I saw something clever, opened it up myself, and started solving it along with you. I'd NEVER claim that counts as solving, because I was standing on simon's giant shoulders, but it was a GLORIOUS experience, - and even if I was stealing simon's insights, I got a lot of my own insights too. I had the EXACT same moment of horror with the deadly pattern at the end... and had the exact same ECSTATIC EPIPHANY at realising the bishop disambiguated it. GLORIOUS puzzle, wonderful video. I should have spent the last hour writing, whoops! Thank you again!

@rubysauce Жыл бұрын

I finally tried one as I felt this was the first time I got off to a quicker start than Simon.. I got really far but then I had to go back to the video to cheat a bit and I noticed.. I forgot the king was in check at some point. After that my puzzle fell like a house of cards so it was the final piece I needed. Still, this was a very entertaining puzzle!

@abhigopal Жыл бұрын

This is brilliant.. also my first time solving one of these marathon puzzles

@kiralovesmusic Жыл бұрын

1:06:00 you can deduce that the 8 is C6R6 if 8 is in either positions in C7 in box 6 the knight couldn’t stay where it is because there would be two 8’s in column 7 so it would need to move to the only other position C6R6 which would place a second 8 in box 6 so the 8 in box 6 isn’t in column 7 so it’s in C6R6

@josephsilbiger8601 Жыл бұрын

I loved every second of this masterpiece thank you.

@nickj7332 Жыл бұрын

Absolutely brilliant!

@dibb1e374 Жыл бұрын

When trying to figure out where the Queen goes around 34 minutes in, I was screaming at my screen because Simon failed to realize you can't put the queen through the rook, locking the 3 of the Queen to the 2nd column. I'm not sure how much of an impact it has on the puzzle but it hurts to watch. Bobbins!

@mthaler108 Жыл бұрын

Tried to do it on my own but I just couldn't get past the the first few fives and ones, so I followed along and with every hint of yours stopped the video and tried it on my own again. I actually got the hang of it after some time yet it still took me 92 min to finish. This was tough, wow! Also to Chris, just wow!

@Alsadius Жыл бұрын

That is a truly glorious puzzle. I'm impressed.

@menturinai1387 Жыл бұрын

This puzzle was absolutely crazy awesome!

@jadephoenix Жыл бұрын

Thank you for this great sudoku! It was a pleasure solving and the first time I got to use my chess board for a sudoku. I would love to see similar sudokus in the future.

@ManusHand Жыл бұрын

Hi Jade -- you can find a couple hundred similar puzzles in the Chessgame Sudoku variant at www.manushand.com/chessgame ! Check them out, please!

@VinnyF3 Жыл бұрын

Really cool puzzle. I think this is the first time I could solve an hour+ long solution video. You really needed to have knowledge of how pieces move to finish it

@zdenekpavlatka609 Жыл бұрын

Took me multiple hours to solve this, but it was definitely worth my time! Surely one of the best puzzles I ever solved.

@olleicua Жыл бұрын

An excellent puzzle indeed. I love that you figured out the knight at the end a different way than I did. My logic was that white would be in check at the end if the knight didn't move which would be fine except that black has to move a rook after moving that bishop.

@NikitaGrygoryev Жыл бұрын

Exquisite puzzle. And the check consideration forcing king to e2 is just a cherry on top of it.

@reubenmckay Жыл бұрын

That was mind-bogglingly fasciniating!

@jkirk9803 Жыл бұрын

I was able to finish this beauty with only one or two pieces of logic from Simon. As a chess player this was quite fun and would love this to become a genre of puzzle

@stevel875 Жыл бұрын

A useful way to pencil mark in order to be able to "read" the board was a colour for each type of piece, used for the square it landed, or was confirmed to have stayed (together with line tool in same colour). I used Blue for Bishop, greeN for kNight, Red for Rook etc. Also marked confirmed empty squares in pale grey making it much clearer which pieces needed further consideration. Now if only I'd spotted all the other stuff as fast as Simon....

@HikingEngineer Жыл бұрын

I just around to this -- this was great. I missed the whole queen checking the king thing, so was totally stuck until that point, which then easily finished the puzzle

@markp7262 Жыл бұрын

1:03:29 finish. As a lapsed chess player, I thoroughly enjoyed this. I didn't even consider having to worry about the king being in check, until I got stuck and sat staring at the screen. This puzzle is so unique, I don't even see how it could be duplicated. Amazing!

@richardfarrer5616 Жыл бұрын

I never normally try the puzzles on this long a video. The concept was so intriguing that I had to give it a go though. I had to get a hint from the video about considering checks but solved it in 108:11. I'm now exhausted and may have to go back to bed!