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masros 97 ( +1 | -1 )
Hard chess puzzle! I have a chess puzzle.Can anyone create a position that match the following condition.I have send this puzzle to other forum and some GK's members but only one person can solve it. So far no GK's member have abble to solve it.
Here are the condition:
Black to move

1)BLACK move and double-check the WHITE's King,
2)WHITE escaped the doublecheck WITHOUT CAPTURING ANY BLACK's PIECE and
3)At the same time demasked another line so that now the BLACK King is in check
4)And this check is MATE!

This chess puzzle is originally came from misato idea when we were discuss one of my message and I make some improvement from original puzzle.

Good luck,

masros 7 ( +1 | -1 )
Seem GK's member dont have enough brain power :(.
dojdosa 3 ( +1 | -1 )
W: Ke3, Qg1, Rb1, Re4, Bc2
B: Ke1, Bc1, Nd2

white's last move was qg1+

1. Nf1++ Kd3#
bogg 52 ( +1 | -1 )
dojdosa Sorry, but the rules said White's last move wasn't check so Qg1+ couldn't be White's last move.

This seems impossible. If Black doesn't start in check and White isn't allowed to capture either of Black's checking pieces, then no matter what the position is Black will have 2. ... (unpinned checking piece to the square vacated by the White K) therefore White can't mate in one. If I haven't misread the rules or if this is actually possible I would like to see the answer.

CTC (Bogg)
alberlie 8 ( +1 | -1 )
Just... have the queen move to g2 instead of g1! Then however, Nf1 is no longer forced...
bogg 9 ( +1 | -1 )
masros Pawns aren't pieces so solutions like the following don't follow the rules.

W) Kd5, Qc7, Rf8, Be4, Xe6
B) Ka8, Rd8, Pd7

CTC (Bogg)
dojdosa 16 ( +1 | -1 )
Qg1 isn't a check if we place a white knight on f1, and in the final position there are 8 pieces on the board. I don't know if it is correct or not, but I don't think there exists a better solution.
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bogg 67 ( +1 | -1 )
dojdosa I don't think that fits the rules, nine pieces on the board at the start. Also, I wouldn't call that a solution if nine pieces were allowed as White has no mate after 1. ... Nc4+. Still, all in all, an excellent try in my opinion! I didn't think of the idea of having a piece captured so that both of the Black pieces could be pinned, which seems odd in retrospect as in my example of a not legal solution using a pawn I had to have a piece captured. I still can't see how to accomplish this with eight pieces at the start, but maybe it is possible! If nobody has solved this by tommorow I will look at it and see what I can come up with, busy today.

CTC (Bogg)
bogg 16 ( +1 | -1 )
masros With a strick interpretation of the rules I think this is impossible. Please educate me. A private message is fine if you don't want to ruin it for others.

CTC (Bogg)
masros 4 ( +1 | -1 )
Pawn is also one of the 8 pieces in board.
bogg 5 ( +1 | -1 )
masros Then here is another solution:

W: Kd1, Re1, Qb3, Be5, Xe2
B: Ka1, Pd3, Rd4

CTC (Bogg)