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White to play and draw—Twin

A: diagram

B: h8N to h8B, remove Pfrom a6 Solutions:

(B) 1. Nf5+ Kf8 2. g7+ Bxg7 3. Ne7 Rh8 4. Ng6+ draws.

Unfortunately, the above also has two changes, so here is a correction.

White to play and draw—Twin

A: diagram B: h8N to h8B

(A) 7. Nf5+ Kf8 8. g7+ Rxg7 9. Nxg7 Kxg7 10. Kf5 Kh6 11. Kg4 Ng6 12. h3! Kg7 13.

Kg5 Kf7 14. Kf5 and Black is not able to make any progress.

(B) 1. Nf5+ Kf8 2. g7+ Bxg7 3. Ne7 Rh8 4. Ng6+ Ke8 5. Nxh8 Bxh8 and it is also a positional draw because of the wrong color of the bishop.

Less is more

The twin problem is only justified when the ideas cannot simply be shown in one endgame—otherwise it is superfluous.

L. Prokes 1947

(see diagram top of next column)

A: diagram

(A) 1. Ba6 Rb8 2. g8=Q+ Rxg8 3. b8=Q Rxb8 4. Bc8 wins.

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