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Game result (chess) S. Ligon, 2321 M. LaDuke, 2326 1/2-1/2 See game 152178 |
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Thibault de Vassal (2006-10-19 20:06:19)
Mate in 292 moves
Otto - Titus Blathy (1860 - 1939), Hungary
Vielzügige Schachaufgaben, 1889
(10 + 12)
Mate in 292 moves
Illegal position
Now you may try to solve the problem, but my question is : Why is this position illegal ??
ChessPosition (see diagram)
Wolfgang Utesch (2006-10-19 20:19:50)
Mate in 292 moves
Hello Thibault, I think the pairs of double pawns on e-g-h-lines are impossible to achieve out of the normal chess start position! Wolfgang
Wolfgang Utesch (2006-10-19 20:47:01)
Mate in 292 moves
The white pawn h4 cannot reach its position without striking the black g-pawn - but this g-pawn is still there! Wolfgang
Thibault de Vassal (2006-10-19 23:07:16)
Re: Mate in 292 moves
Can't the pawns strike other pieces, rooks, bishops... ?!
Wolfgang Utesch (2006-10-20 07:22:10)
Mate in 292 moves
You're right! But this position seems to be so artificial, that I can't believe to reach it in order with all chess rules out of a normal chess start position. And I can't see any other problem with this position. Wolfgang
Wolfgang Utesch (2006-10-19 20:56:51)
Mate in 292 moves
More accurate: The white pawn h4 cannot reach its position without striking the black g- and h-pawns - but this g- and h-pawns are still there! In combination with the black g-double pawn an the black h5-pawn, which position need to strike the white g- and h-pawns is it unpossible to reach out of the normal chess start position! Wolfgang
Wolfgang Utesch (2006-10-20 09:39:00)
Mate in 292 moves
Yes, Gino, you are right! All pawns on board, so the double pawns can reach their position only by striking of other figures. For this position black should have had 9 (!) other figures (h4 by 2 figures; g5 by 3; e6 by 4) - but only 4 are missing. Wolfgang
Thibault de Vassal (2006-10-20 14:09:35)
Re: Mate in 292 moves
The minimum number of pawn captures is 8, that's a funny problem :)
Now here is the solution for the mate :
http://www.chess-problem.com/classic4.htm
Thibault de Vassal (2007-10-01 05:20:50)
Tablebases : Mate in 517+
While I was checking some positions in 6-pieces tablebases, I was wondering what was the longest win found in tablebases so far...
I found the answer here (new record established in May 2006) :
http://en.wikipedia.org/wiki/Endgame_tablebase#Endgame_theory
"For some years, this position held the record for the longest computer-generated forced mate. (Otto Blathy had composed a mate in 292 moves problem already in 1889.) However, in May 2006, Bourzutschky and Konoval discovered a KQNKRBN position with an astonishing DTC of 517 moves. This was more than twice as long as Stiller's maximum, and almost 200 moves beyond the previous record of DTC = 330 for a position of KQBNKQB_1001."
What I just can't understand is how is it possible not to know the DTM (Distance To Mate) while knowing the DTC (Distance To Conversion) ?!
Anyway, amazing ! .. Any taker ? :)
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