Frederick Lazard, 1948
White to play and win
White to play and win
Black is two pawns up so white needs to promote the f-pawn in order to win.
1.Be6+!
Pushing the pawn immediately would be a mistake: 1. f7? Bg7 2. Nf5 Bf8 3. fxe8=Q+ Kxe8 4. Be6 d4! 5. Nxd4 Bg7
Black got the bishop out and the position is drawn
1...Kxe6 2.f7 Nf6
This is the trickiest option for black since white could promote to a queen after any other move. However, now black has 3.f8=Q? Nd7! and now black is winning
3. f8=N+ Kd6 4. Nf5# (or 4.Nf7#)
A very pretty final position