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Topic: Chess Position (Read 866 times) |
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ThudnBlunder
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What can be said about this position?
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| « Last Edit: Jun 15th, 2007, 9:01pm by ThudnBlunder » |
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rmsgrey
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Re: Chess Position
« Reply #1 on: Jun 16th, 2007, 7:09am » |
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on Jun 15th, 2007, 8:33pm, ThudanBlunder wrote:| What can be said about this position? |
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The board's upside down?
edit: On second thoughts:
Someone's cheated
edit2: On third thoughts:
probably still someone's cheated, but it'll take more work to prove it
edit3: Fourth and final thoughts:
OK, not that much more work - It's Black's move and no-one's cheated yet.
edit4: Fifth and really final thoughts:
OK, there's no possible last move for white, so someone has cheated after all.
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| « Last Edit: Jun 16th, 2007, 7:16am by rmsgrey » |
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Grimbal
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Re: Chess Position
« Reply #2 on: Jun 16th, 2007, 8:23am » |
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I don't see why someone must have cheated. It's white's turn, that's all.
Besides, I would say the players are not seriously trying to win.
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| « Last Edit: Jun 16th, 2007, 8:23am by Grimbal » |
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ThudnBlunder
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Re: Chess Position
« Reply #3 on: Jun 16th, 2007, 10:03am » |
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on Jun 16th, 2007, 8:23am, Grimbal wrote:| I don't see why someone must have cheated. It's white's turn, that's all. |
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Perhaps a recount is required. 
on Jun 16th, 2007, 7:09am, rmsgrey wrote:| OK, there's no possible last move for white, so someone has cheated after all. |
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Correct, though I would just say that the position is impossible.
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| « Last Edit: Jun 18th, 2007, 2:30am by ThudnBlunder » |
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Grimbal
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Re: Chess Position
« Reply #4 on: Jun 18th, 2007, 1:14am » |
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on Jun 16th, 2007, 7:09am, rmsgrey wrote:
OK, not that much more work - It's Black's move and no-one's cheated yet.
edit4: Fifth and really final thoughts:
OK, there's no possible last move for white, so someone has cheated after all. |
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I follow you up to: It's Black's move and no-one's cheated yet.
Which is is compatible with: OK, there's no possible last move for white, ...
But I don't see how you can conclude: ..., so someone has cheated after all.
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| « Last Edit: Jun 18th, 2007, 1:14am by Grimbal » |
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rmsgrey
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Re: Chess Position
« Reply #5 on: Jun 18th, 2007, 7:46am » |
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on Jun 18th, 2007, 1:14am, Grimbal wrote:
I follow you up to: It's Black's move and no-one's cheated yet.
Which is is compatible with: OK, there's no possible last move for white, ...
But I don't see how you can conclude: ..., so someone has cheated after all.
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OK, the final conclusion is a little bit of a stretch. I should have said: ..., so the position was not arrived at by playing chess according to the rules
The key observations in my thought process:
1) Every legal move so far must have moved a piece between two squares of different colours, creating a measurable parity. Since black and white have different parities, it must be black's move.
2) The only square which a white piece could otherwise have come from which is unoccupied is f6, and the knight would have had the black king in check there, so there's no position from which white could have moved to reach the position shown
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Grimbal
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Re: Chess Position
« Reply #6 on: Jun 18th, 2007, 8:30am » |
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Aaah, OK. The parity argument is what I didn't get. Thanks.
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