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# Hardest Checkmate in 1

• #21
SlytherinsHeir945 wrote:

Bxe5. The board is upside down.

Clever!

But if it were upside down that would be Bxd4

• #22

Rb×f7+ kh8 qf6 bg7 q×g7

• #23
faridmusayev wrote:

Its hardest checkmate by white done in 1 move only can you find the move?

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The only checkmate in one is if the e-pawn moved two squares as the last move, otherwise mate is only possible in two moves (the OP should tell about the last black move, as otherwise solution is unclear).

• #24

A couple things wrong with this position:

1. There is no mate in 1, since to play en passant we would need to know for certain that black's last move was that pawn move

2. The position itself cannot possibly occur in a game. Both sides have all their pieces still on the board, and 7 of their pawns. This means they have each made exactly one capture. Yet white has two pairs of doubled pawns, indicating (at least) two captures. Can't possibly be reached from the starting position.

• #25
tooWEAKtooSL0W wrote:

A couple things wrong with this position:

1. There is no mate in 1, since to play en passant we would need to know for certain that black's last move was that pawn move

2. The position itself cannot possibly occur in a game. Both sides have all their pieces still on the board, and 7 of their pawns. This means they have each made exactly one capture. Yet white has two pairs of doubled pawns, indicating (at least) two captures. Can't possibly be reached from the starting position.

The reasons sort of go together.

En passant can be legal without an observer knowing what the last move was, but if the position is illegal then there was no last move.

Of course, I'm sure it was never intended as anything but a novelty puzzle anyway.

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