Hardest Checkmate in 1

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

For more puzzles like this please dont forget to check our facebook page

https://www.facebook.com/Chesstomax/

If you want to see interesting and cool videos about chess you can check out our youtube channel

https://www.youtube.com/channel/UCwXP-wNVKOpz8-svTEHIfMg

Thanks for your attention

Try this thread https://www.chess.com/forum/view/general/hardest-mate-in-one-ever

Qf6+ is a mate in 4.

1. Qf6+ Kxh6 2. Qh4+ Kg7 3. Rbxf7+ Kh8 4. Qxh7

Best I can see is mate in 2.

1. Rfxf7+ Kh8 2. Rxh7#

(And @chiefonion changed his post after I started mine.)

The solution is dxe6# (en passant).

This puzzle is more of a trick since faridmusayev didn't mention if en passant is legal in this position...

Ah yes, maybe. Without knowing the previous moves (or at least the previous move) it would be impossible to know that.

@Rsava

Exactly. This puzzle is more of a trick than anything else...

dxe6# is only allowed if one can prove that black's last move was e7-e5. It is clear from the position that black could have played a lot of moves besides e7-e5. So my conclusion is that there's no mate in 1

Also, this position is not legal, meaning it cannot be reach from the starting position. For a position to be considered a problem the position must be legal

The position is completely legal and logical. If two moves back white had played B b2+, it would have been mate if black's  e pawn had not been on e7 or e6. therefore, in order for there to be mate in one, black's e pawn had to be on e7 rather than e 6. Consequently, black's e pawn had to move from e7 to e5 to avoid mate by white's bishop on b2.

though if he checked the previous move it would of been valid

 Yes, it is called "discussion".

And since it is about a chess problem in general, it is "General Chess Discussion".

Much better than the vast majority of stuff that gets "discussed".

Bxe5. The board is upside down.

• Certainly not legal
• Nor logical
• "Consequently(?), black's e pawn had to move..."  Nope. Black also could have played f7-f6 with the pawn on e7.
• Of course given the task "mate in 1", d5xe6 e.p. is the only possible solution.

dxe6

I remember this from when it was posted many years ago on chess.com.

Clever!

But if it were upside down that would be Bxd4

Rb×f7+ kh8 qf6 bg7 q×g7

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).

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.

 pwan e6

e6