Hello:
I come with an idea that is probably not new, but which I have not found in a brief search: it consists of giving a series of discovered checks until the checkmate (or almost), or to have a winning position, starting with a heavy material disadvantage. We all can produce thousands of such positions like 5K1k/b6b/6P1/8/4q2r/3qq2r/2qqq2n/1qqq3n w - - 0 1 (g7# in K+P versus K+9Q+2R+2B+2N). However, I bring some positions that I composed in good moments (there can be more with different subtleties).
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The first one is more straightforward, with discovered checks here and there until it the moment of giving checkmate arrives:
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The second one is a bit more elaborated, with a tempting avoid move at some point only adding two pawns, one of each colour:
It should be a checkmate in 23 moves from the starting position.
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The third one is a variation of the first one, adding one black passed pawn that threatens queening and initially blocks the checkmating diagonal:
It should be a checkmate in 13 moves from the starting position.
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There can be many more variations: for example placing other pawns, knights, rooks (neither bishops nor queens) or nothing to b3, c4 (depending, not a rook if it gives check to the white king), d5 and e6 squares; replacing the black queen on a2 with other black piece; putting a black piece (except a pawn) or not on g8; adding some pawns elsewhere to add subtleties to the main idea of the first position; and so on.
If you try them by yourselves, do not get fooled by the stalemate carelessness in the second problem!
Regards from Spain.
Ajedrecista.
Funny problems with discovered checks (easy for engines and surely easy for people).
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