It seems that you will lose the game, but it cannot be too late. You can still have a chance to trick your opponent by a chess swindle.
White
Black
Cook
1864
1. Rb7+Kc8 2. Rb5c1=Q 3. Rc5+Qxc51/2 - 1/2
It seems that White will lose . Black threatens to promote to Queen. But a chess swindle exists : a rook sacrifice will prevent the defeat of White
White
Black
Veliky
1. Bb6+Kd3 2. Nh3h1=Q+ 3. Bg1Ke4 4. Kf1Kf5 5. Nf21-0
Allow Black pawn to promote but this will be a jail for Queen. It is just a swindle.
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