8
[FEN "8/7P/8/p2p4/P2p4/pB1p4/3P4/k2K4 w - - 0 1"]

Composed by IM Geir Sune Tallaksen. White moves first, and must force Black to deliver checkmate. Give the sequence of moves that force Black to mate White on the 7th move!

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  • I guess that "force" means that Black should have only one available move each time and the 7th move should be mate, right? Dec 24 '20 at 10:43
  • @double-beep That is incorrect. In any problem. Black is allowed to have many moves as long it fulfills the stipulation and doesn't conflict with the author's solution (otherwise the problem is cooked.) Dec 24 '20 at 17:16
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Neat:

[FEN "8/7P/8/p2p4/P2p4/pB1p4/3P4/k2K4 w - - 0 1"]

1. Kc1 a2 2. Bc2 dxc2 3. h8=R! d3 4. Rb8 d4 5. Rb4 {And from here on, both sides' moves are legally forced.} axb4 6. a5 b3 7. a6 b2#

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