CHESS PUZZLE, FEN 8/3P3k/2Q2n1p/5PpP/1P2PbP1/1q6/2N2B2/3K4 b - -

Added by:mahmoud_elgendy
Added on:27-Apr-15
Description:
Difficulty:
chess puzzle 8/3P3k/2Q2n1p/5PpP/1P2PbP1/1q6/2N2B2/3K4 b - -
Attempts:34
Solved:29 (85%)
Black to move, mate in 5
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kingdawar
27-Apr-15, 04:51

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Krause - Heyken, 1981
capafan
02-Mar-26, 15:37

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Outstanding Teaching Example! 😃
This should not have been so challenging, but it was.
I kept thinking I had to get him into the corner by the Kt (a1), but that proved virtually impossible. When I found taking the two Pawns (e4, g4) is just as easy as taking the one on b4 (using discovered check), it led me to look for a way of taking the Bishop (using discovered check, of course!).

That's how I found something even better: capturing the Bishop when the WK is on f1!

1. Qd3+...Ke1 (forced), 2. Bd2+...Kd1 (forced, he's in a *confined* condition), 3. Be3+ (disc.)...Ke1 (forced), 4. Qd2! (this is the move I had not thought of previously)...Kf1 (forced), 5. Q×f2#.

This *confined* condition is one which, if it occurs when no other Black pieces on the board can move, AND it's Black's turn to move, it is Stalemate. BK is confined. Q & B of the same color can do this but Q&N cannot. Here, if it were Black's move, he'd have to move another piece, but we're keeping BK in check every move so as to prevent d8=Q.
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