Leaving the Box at the Right Moment

White to play and win, after Kling and Horwitz, 1851

The pawns are almost ready to roll and your king is still on a leash, tied to the square of Black's protected passer. The win is pure timing: triangulate first, then step out and let both sides queen, because you queen with mate.

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Leaving the Box at the Right Moment

White to play and win · Win against perfect defense

Waking the engine…

The theory

Watch the method: press play to see the winning idea run, or step through it move by move.

This is the second half of the Kling and Horwitz study, and it shows what 'choosing the moment' actually means.

Ready to roll. g6 places the pawns on g6 and h5, each covering the square the other needs. Your king is still tied to the square of Black's protected c4 passer, so it cannot escort them yet. Step out now with Kg5 and the c-pawn simply queens.

Triangulate first. Ke4, Kf3, Kf4: a three-move triangle that hands Black the move. His king lands on g7 instead of f6, and only then does Kg5 work. Timing, not speed.

Then run. Once the king leaves the box, Black's c-pawn queens. That is part of the plan. Your pawns come with check the whole way, and after c1=Q g8=Q+ the finish is mate on g6.

In this drill the temptation is to break early. Do the triangle, count the checks, then go.

Keep going

Winning with Semi-Stalemate

White to play and win

The Bishop Sacrifice That Buries a King

White to play and win

One Tempo Short: g and h vs the h-Pawn

White to play and draw

All 62 king & pawn positions Follow the full curriculum (free)