Thinking about it is too much effort (IMO), but even with brute force one can reach the 18-queen position. Example solution: http://pastebin.com/YvqJKtG4. I am sure a person who wished to "golf" the final position could improve the solution significantly.MikeB wrote:It's impossible for both sides - black and white to promote all 16 pawns to Q. Think about how each side would get ALL the pawns to the queenning square. There are not enough non-pawn pieces on the board to facilitate the column manuevering for the pawns to pass each other. It is not "highly improbable" , but 100% impossible.Milos wrote:Why it is not possible???MikeB wrote: The position is not possibe from a real game of chess - but Crafty sees the 8+1 queens on both sides and is happy to oblige.
It's quite possible, it's however highly improbable.
Still looking for the engine that can analyze this position
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Re: Still looking for the engine that can analyze this posit
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Re: Still looking for the engine that can analyze this posit
I'm looking at the position posted in the post you replied to... As I said, the original position is illegal for several reasons...Graham Banks wrote:Suggest what the last move could have been. I'm looking at the position where there are no empty squares on the board.bob wrote:Why? one can first create 8 new queens, then shuffle them at will to reach that position...Graham Banks wrote:Wouldn't the last move have had to have been a pawn promoting to a queen, in which case the square from which it had moved would be empty?Milos wrote:Why it is not possible???MikeB wrote: The position is not possibe from a real game of chess - but Crafty sees the 8+1 queens on both sides and is happy to oblige.
It's quite possible, it's however highly improbable.
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Re: Still looking for the engine that can analyze this posit
Yes - I've already pointed out that I was referring to the position where there were no empty squares on the board. The one you're referring to is obviously okay.bob wrote:I'm looking at the position posted in the post you replied to... As I said, the original position is illegal for several reasons...Graham Banks wrote:Suggest what the last move could have been. I'm looking at the position where there are no empty squares on the board.bob wrote:Why? one can first create 8 new queens, then shuffle them at will to reach that position...Graham Banks wrote:Wouldn't the last move have had to have been a pawn promoting to a queen, in which case the square from which it had moved would be empty?Milos wrote:Why it is not possible???MikeB wrote: The position is not possibe from a real game of chess - but Crafty sees the 8+1 queens on both sides and is happy to oblige.
It's quite possible, it's however highly improbable.
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Re: Still looking for the engine that can analyze this posit
Interesting is how most engines completely mis-evaluate such extreme positions. E.g. Crafty thinks it is ahead about +8 as black in
[d]1q1qk1q1/3ppp2/8/8/8/2NNNN2/3PPP2/1N1NK1N1 w
As white is might even resign after a few moves, in this overwhelmingly won position. (Or was that only when white had 6 Knights? I forgot.)
(It cannot handle the more elegant position with a filled Pawn rank, which is won just as easily.)
[d]1q1qk1q1/pppppppp/8/8/8/8/PPPPPPPP/NNNNKNNN w
[d]1q1qk1q1/3ppp2/8/8/8/2NNNN2/3PPP2/1N1NK1N1 w
As white is might even resign after a few moves, in this overwhelmingly won position. (Or was that only when white had 6 Knights? I forgot.)
(It cannot handle the more elegant position with a filled Pawn rank, which is won just as easily.)
[d]1q1qk1q1/pppppppp/8/8/8/8/PPPPPPPP/NNNNKNNN w
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Re: Still looking for the engine that can analyze this posit
Other than Hagrid, only Aristarch has not crashed so far (Chesspartner 5.4)
00:00:00.0 -3.35 1 10 Qaxb5
00:00:00.0 0.13 2 655 Qaxb5 Qhxg4
00:00:00.0 -3.04 3 902 Qaxb5 Qaxb5 Qgxh5
00:00:00.2 -2.94 4 98369 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qbxa4
00:00:01.4 -3.18 5 742710 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qgg4
00:00:02.2 -3.04 6 1229579 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qgg4 Q7a5 Qgxf5 Qgxf5
http://www.friedelprivat.de/
(Snitch would not calculate)
00:00:00.0 -3.35 1 10 Qaxb5
00:00:00.0 0.13 2 655 Qaxb5 Qhxg4
00:00:00.0 -3.04 3 902 Qaxb5 Qaxb5 Qgxh5
00:00:00.2 -2.94 4 98369 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qbxa4
00:00:01.4 -3.18 5 742710 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qgg4
00:00:02.2 -3.04 6 1229579 Qaxb5 Qaxb5 Qgxh5 Qaa4 Qgg4 Q7a5 Qgxf5 Qgxf5
http://www.friedelprivat.de/
(Snitch would not calculate)
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