4:11 in this position I calculated a6 but f5 is not a move I wanna face, I don't wanna give up my light square bishop for his misplaced knight (now it is attacking c7 and d6 squares but if f5 was not a threat a6 would kick the knight back to a3 where only c4 is the forward jump. d5 f5 d4 fxe6 dxe3 exf7+ Rxf7 Qxd8 Rxd8.... The resulting position is not good for black. If white doesn't trade queens I think it's even worse for black. Doubled e pawns, f file ripe for attack although opposite color bishop meaning if played well then maybe, we can hold it. exf4 Bxf4 Qb6+ Kh8 a6 Na3 Qxb2 Qd2... I'm not sure... Maybe I'm missing something.... Idk this is what my initial stock of the position tells me... Mahbe if I take 10 15 mins I might find some other better move but for now exf4 seems like the move I'd play Edit: wow, I rejected a6 because of f5 and it seems I was wrong. Kudos to you. Amazing.

8:28 2 candidate moves. Qd1+ Qd5 Qd1+ Qf1 Qd4+ Qf2 Qxb2 Qf3 Qc1 Kf2 Qd2+ Kg3 Qd6+ Kf2 Nd4... And I don't see a way for white... As for Qd5, it's just basically if I made a mistake in my Qd1+ analysis, Qd5 is the alternative move where you just control the knight and pass the move to white and ask what you wanna do? However I think I'll play Qd1+ Oh wait... I forgot it's your opponents move my bad, he played h3 which changes everything 😂. My bad, ignore this I'm stupid