patzer2: My first candidate move for today's Thursday (53...?) puzzle was 53...gxf2!However, after 54. Qxf2, I didn't see that 54...Rxg1+! -+ (M13, Stockfish 10 @ 55 ply) was the strongest follow-up.
Instead, I went with 54...Qxd6 -+ (-4.43 @ 43 ply, Stockfish 10) expecting 55. Qxh4 Qd1+ (M7, Stockfish 10 @ 45 ply).
But after 54...Qxd6 55. Bxd6 Bxf2+ 56. Kxf2 e3+ 57. Kf1 Rc8 -+ (-4.90 @ 42 ply, Stockfish 10) Black's win, though still secure, takes longer.
P.S.: So where did White go wrong? White had an advantage coming out of the opening, but let it slip with 12. h6?! Nf6 ⩱ (-0.36 @ 31 ply, Stockfish 10).
Instead, 12. Nd4 ⩲ to ± (+0.62 @ 30 ply, Stockfish 10) would have kept
White's advantage.
White's decisive mistake appears to be 40. Nh3?, allowing 40...e5! -+ (-1.70 @ 28 ply, Stockifsh 10).
Instead, 40. c5 bxc5 41. Rxc5 Rcd8 42. Ra5 Bb7 43. Rxa7 e5 ⩱ to ∓ (-0.50 @ 31 ply, Stockfish 10) gives White drawing chances.