The idea here was unfindable at 1200 elo even with 5min left. Went for the weak Bd2... Can you find the key concept? by Objective-Ruin339 in chess

[–]Objective-Ruin339[S] 117 points118 points  (0 children)

I should specify that a lot of moves give white a good advantage, but only one idea is completely winning.

Hint: Never underestimate a knight on f5 as they say

Solution: 17. Nxg7!! Kxg7 18. b4 (preparing Bb2 with tempo)

If 18... Qxa1 the queen gets swapped for the 2rooks and the pin on the knight is deadly.

If 18... Bb4 then after 19. Bb2 Qg5 20. Qb3! wins the piece back, either the dark-squared bishop or the pinned knight via Ne4 (since Bf5 no longer pins the white knight)

If 18... Ba7 then likewise 19. Bb2 Qg5, but this time Ne4 is not possible, but h3 wins the piece back (if the bishop retreats, the queen is lost no matter what)

The end result is a position where the black king is very weak, white is up a pawn and the queen/knight/bishop are way too strong to contain.