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# Reconstructing a puzzle

• #1

A while ago, I posted a topic looking for a certain mate-in-two puzzle I'd seen before; but at the time I was unable to find anyone else who'd seen it and my attempt to reconstruct the puzzle was rather crude. So now, I decided to take a crack at it again and I think I managed to create a better version than before; getting rid of the large material disparity in my first attempt and removing a couple of weirdly-situated minor pieces and a pawn. Still, I'm not entirely sure whether the new version is cooked or unsound, so I figured I'd post it up here and see if anyone spots any loopholes in it. Feedback would be much appreciated.

(Variations are given in the movelist. However, thanks to the inherent nature of the puzzle, there are multiple solutions to some Black responses...I'm just interested in making sure there is only one key first move, and that all Black responses to that move allow a mate in one.)

• #2

Stuck it in problemiste, you'll be happy to know that the solution is unique. Here is the complete solution. (please bear in mind Problemiste is German, S = N!)

Solution: 1. Qf6! [2. Sh6, Rxg7#]
1. ... Qb8/a8/e8/d7/e6, Rb6, Ra6, Rc7, Rd6, Re6, Rc5, Rc4, Rc3, Rc2, Rc1, Bd4, Bc3, Bb2, Ba1 2. Sh6, Rxg7#
1. ... Qd8 2. exd8=Q/R, Sh6, Rxg7#
1. ... Qf8, g6, Bxf6 2. Sh6#
1. ... Qc7/b7/a6 2. e8=Q/R, Sh6, Rxg7#
1. ... Qxf5 2. e8=Q/R, Rxg7#
1. ... g5 2. Sh6, Rxg5#
1. ... h6/h5, Rxf6 2. Rxg7#
1. ... Bf4 2. Qxg7, Rxg7#
1. ... Bxg3 2. Qxg7#
1. ... Bd6/c7/b8 2. Qxg7, Sh6, Rxg7#

• #3

Thank you very much! I didn't think of using a program to check it...although I also didn't expect there would be a program dedicated entirely to puzzle-solving either. On hindsight though, it should have been obvious. XD

Looking at it again though, I noticed it might be possible to clean up a bit...the white g-pawn seems to be superfluous, so I removed it along with the black f-pawn to balance things out (as well as shifting the rook to block Qc4+, which seems to be a forced mate too now that the f7 pawn is gone). If it's not too much trouble, could you help me check this one too? (I've been having problems getting Rybka to run properly since reformatting my computer.)

• #4

nice puzzle, i havent been able to find any holes in it

• #5
tyzebug wrote:

Thank you very much! I didn't think of using a program to check it...although I also didn't expect there would be a program dedicated entirely to puzzle-solving either. On hindsight though, it should have been obvious. XD

Looking at it again though, I noticed it might be possible to clean up a bit...the white g-pawn seems to be superfluous, so I removed it along with the black f-pawn to balance things out (as well as shifting the rook to block Qc4+, which seems to be a forced mate too now that the f7 pawn is gone). If it's not too much trouble, could you help me check this one too? (I've been having problems getting Rybka to run properly since reformatting my computer.)

Yup, this one works too ;)

Solution: 1. Qf6! [2. Sh6, Rxg7#]
1. ... Qb8/a8/d8 2. Qxe6, Sh6, Rxg7#
1. ... Qe8, Rd6, Rc6, Rb6, Ra6, Bd4, Bc3, Bb2, Ba1 2. Sh6, Rxg7#
1. ... Qf8 2. exf8=Q/R, Qxf8, Sh6#
1. ... Qc7/c5/c3/c2/b7 2. Qxe6/f8, Sh6, Rxg7#
1. ... Qc6/c4/d7/a6 2. Qf8, Sh6, Rxg7#
1. ... Qc1 2. Qxe6/f8, Rxg7#
1. ... g6, Bxf6 2. Sf5~#
1. ... g5 2. Sh6, Rxg5#
1. ... h6/h5, Rxf6 2. Rxg7#
1. ... Rxe7 2. Sxe7/h6#
1. ... Bf4 2. Qxg7, Rxg7#
1. ... Bxg3 2. Qxg7#
1. ... Bd6/c7/b8 2. Qxg7, Sh6, Rxg7#

• #6

This is, I think Mate in one, Nh6 #  , prove me I'm wrong :d

• #7

uh ok. Rh6.

• #8
rooperi wrote:
Yup, this one works too ;)

Solution: 1. Qf6! [2. Sh6, Rxg7#]
1. ... Qb8/a8/d8 2. Qxe6, Sh6, Rxg7#
1. ... Qe8, Rd6, Rc6, Rb6, Ra6, Bd4, Bc3, Bb2, Ba1 2. Sh6, Rxg7#
1. ... Qf8 2. exf8=Q/R, Qxf8, Sh6#
1. ... Qc7/c5/c3/c2/b7 2. Qxe6/f8, Sh6, Rxg7#
1. ... Qc6/c4/d7/a6 2. Qf8, Sh6, Rxg7#
1. ... Qc1 2. Qxe6/f8, Rxg7#
1. ... g6, Bxf6 2. Sf5~#
1. ... g5 2. Sh6, Rxg5#
1. ... h6/h5, Rxf6 2. Rxg7#
1. ... Rxe7 2. Sxe7/h6#
1. ... Bf4 2. Qxg7, Rxg7#
1. ... Bxg3 2. Qxg7#
1. ... Bd6/c7/b8 2. Qxg7, Sh6, Rxg7#

Sweet. Thank you very much for the help!

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