Author: Heiner Marxen
Date: 15:13:23 09/21/99
Go up one level in this thread
On September 21, 1999 at 15:48:02, leonid wrote: >On September 21, 1999 at 11:13:51, Heiner Marxen wrote: > >>On September 20, 1999 at 20:07:30, leonid wrote: >> >>> >>>For those who really like some big number of moves in one position. One of >>>my old positions for solving the mate. White have 113 moves and make >>>mate in 5. >>> >>> ------------------------------------------- >>> | | | | | | | | |8 >>> | | | | *R | | *Q | *K | *Q | >>>-------------------------------------------- >>> | | | | | | | | |7 >>> | | | | | | *Q| *Q | *Q | >>>-------------------------------------------- >>> | | | | | | | | |6 >>> | | | | | | | *Q | | >>>-------------------------------------------- >>> | | | | | | | | |5 >>> | | | N | | | *R | | | >>>-------------------------------------------- >>> | | | | | | | | |4 >>> | | | | | | | | | >>>-------------------------------------------- >>> | | | | | | | | |3 >>> | Q | Q | Q | Q | Q | Q | Q | Q | >>>-------------------------------------------- >>> | B| | | | | | | |2 >>> | | | | | | | Q | | >>>-------------------------------------------- >>> | | | | | | | | K |1 >>> | | | | | | | | | >>>-------------------------------------------- >>> >>> * - black color. >>> >>>Position created in 1996. >> >>FEN: 3r1qkq/5qqq/6q1/2N2r2/8/QQQQQQQQ/B5Q1/7K w - - >> >> Qxf7+ Q6xf7 Bxf7+ Qfxf7 Qxd8+ Qe8 Qaa2+ Rf7 Qfxf7# >> >>It is not free of duals, but it is not supposed to be so, right? >>The key move Qxf7+ is unique. >> >>Heiner >> > >I don't know if I understood correctly but if you wanted say that few >moves can lead to the mate in the same position, I agree. I don't know Yes, that is meant by a "dual": the attacker has more than one move to solve the position. Problem composers always try to avoid a dual in the posed position: such a problem would be considered wrong/buggy. Sometimes problem composers try hard to avoid further duals down the solution tree. >exactly for this one but many have. When I want to see if few moves leading >to the mate existe I ask the logic to find them all. Here logic said that mate >existe in 5 moves. If some logic will find mate before this number it is >buggy. Aah, hrmm. Now I start to be really curious about your "logic" for mate solving. I'd like to learn more about it. Something I could read somewhere? Heiner
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.