Go back
White to move.......

White to move.......

Posers and Puzzles

Vote Up
Vote Down

Zugzwang example

Sam Loyd


#2

Vote Up
Vote Down

Originally posted by BigDoggProblem
[b]Zugzwang example

Sam Loyd
[fen]2brrb2/8/p7/7Q/1p1kpPp1/1P1pN1K1/3P4/8 w - - 0 1[/fen]
#2
[/b]
1.Qa5!
1...Re7 (1...Rd6) 2.Qxb4#; 1...Be6(1...Be7) 2.Qe5#; 1...Bd6 (1...Bd7) 2.Qd5#; 1...Re6 (1...Rd7) 2.Nf5#, and lastly 1...Bc5 2.Qa1#

Vote Up
Vote Down

....and mate in two. An oldie but a goodie...



skeeter

1 edit
Vote Up
Vote Down

Originally posted by skeeter
....and mate in two. An oldie but a goodie...

[fen]8/8/3B2p1/6K1/1PPkp3/2RnN2Q/8/nN6[/fen]

skeeter
1. Qh5!
1. ...Nc2 2. Nxc2#
1... Nb3 2. Nc2#
1... Nb2 2. Qh8#
1... Ne5 2. Bc5#
1... gxh5 2. Nf5#

Vote Up
Vote Down

Yep. that looks pretty right according to the notation here. Try this one:

Invalid FEN inserted - 8/5R2/1N2p1pK/4k1p1/nQ6/1N1q1B2/8/8/


skeeter

Vote Up
Vote Down

Originally posted by skeeter
Yep. that looks pretty right according to the notation here. Try this one:

[fen]8/5R2/1N2p1pK/4k1p1/nQ6/1N1q1B2/8/8/[/fen]

skeeter
Qd2

Vote Up
Vote Down

Originally posted by ilywrin
1.Qa5!
1...Re7 (1...Rd6) 2.Qxb4#; 1...Be6(1...Be7) 2.Qe5#; 1...Bd6 (1...Bd7) 2.Qd5#; 1...Re6 (1...Rd7) 2.Nf5#, and lastly 1...Bc5 2.Qa1#
Correct. This is a true zugzwang; if black could 'pass' after 1.Qa5, white would have no mate on the 2nd move.

Vote Up
Vote Down

Originally posted by Mephisto2
Qd2
Correct. This next one is a little harder:



skeeter

1 edit
Vote Up
Vote Down

Originally posted by skeeter
Correct. This next one is a little harder:

[fen]3nbb2/Q1pr1pp1/B7/p1PP3p/K1Nk3r/1RN1RPP1/8/B7[/fen]

skeeter
1.Na3 seems to do the trick

9 edits
Vote Up
Vote Down

Too good. Try this one:



skeeter

..and if you're all wondering about all the edits its because the site wouldn't allow me to 1KN1n etc after ....8/8/. I hade to code KN1n etc.

Anyone else have this problem?? Bug?

1 edit
Vote Up
Vote Down

Originally posted by skeeter
Too good. Try this one:

[fen]4R3/1B7/8/8/1KN1n2r/5P2/1R1Pk2P/1Q7[/fen]

skeeter

..and if you're all wondering about all the edits its because the site wouldn't allow me to 1KN1n etc after ....8/8/. I hade to code KN1n etc.

Anyone else have this problem?? Bug?
1. Ne3 (threatens 2. Qf1# ) Nxd2+ 2. Ng4#

After any other move Qf1 mates.

6 edits
Vote Up
Vote Down

Originally posted by skeeter

..and if you're all wondering about all the edits its because the site wouldn't allow me to 1KN1n etc after ....8/8/. I hade to code KN1n etc.

Anyone else have this problem?? Bug?
Perhaps you've added something in the first few rows:
e.g. 5N3B places the white bishop at b7
Check if your previous codes sum up to 8, if not that's the begining of the problem.
EDIT:
Problem found skeeter:
In you original fen the second row is: 1B7 which adds to 9 😉 It should be 1B6

I'll have to try if fen works without the /
e.g
84BrNkQK888895
Let's see:
Invalid FEN inserted - 84BrNkQK888895


EDIT: seems to work with digits only. Original try was 12BrNkQK45

Vote Up
Vote Down
1 edit
Vote Up
Vote Down

Originally posted by skeeter
Yep. Xanthos has clearly blown his cover by posting the correct solution to the wrong position. Figures.

skeeter
Huh? I copied it into Chessbase, adding the 1 in the process as it wouldn't accept it as is (use reply and quote and copy paste to get at the FEN), and used that in working out the solution. I didn't turn on the engine, I just use it so I can move pieces around. Anyway for some reason oftentimes when I just cannot find the solution to a mate in X puzzle and I stick Fritz on it Fritz will find a mate in X+1 or something and stop looking.

I didn't notice that the position displayed is different from the one the FEN gives.

Vote Up
Vote Down