Author: Roland Pfister
Date: 00:37:33 11/22/00
Go up one level in this thread
On November 21, 2000 at 20:05:03, Bruce Moreland wrote: >On November 21, 2000 at 18:27:28, Eduard Nemeth wrote: > >>[D]8/2K5/1p6/1P4k1/5p2/8/6P1/8 w - - 0 1 >> >>Here a correct analysis: >> >>1. Kc6 Kg4 2. Kd6 Kh4 3. Ke6 Kg5 4. Ke5 Kg4 5. Kf6 Kh4 6. Kf5 Kg3 7. Kg5 f3 8. >>gxf3 Kxf3 9. Kf5 ++- >> >>1.Kxb6 is draw. >> >>By me this winning only Fritz, without TBs ! >> >>Eduard > >This implies that Fritz understand KQ vs KP with an f-pawn. Understand of this >position used to be included in one of the commonly used test suites, so perhaps >this is why Fritz understands this. > >If someone wants to do some Fritz archaeology, they may be interested in >figuring out which version of Fritz introduced this knowledge. > >Surely it can't be doing it with search. It's very easy to take this to >queening, and that's +8 or so. In order to win for real, you have to prefer the >position with the k-side pawns gone and the white king a ways away from the >q-side pawns. > >bruce Patzer has the knowledge of KQ-KP with f-pawn. So it promotes to a rook :-) in iterations 9 to 12. But search seems to solve the problem. I did not build in the necessary KR-KP knowledge because at that time the TBs were already available ... Neue Stellung 8/2K5/1p6/1P4k1/5p2/8/6P1/8 w - - 0 1 Analysis by Patzer 3.11a: ... 1.Kxb6 Kh4 2.Kc7 Kg3 3.b6 Kxg2 4.b7 f3 5.b8T f2 6.Tg8+ +- (2.96) Tiefe: 9 00:00:00 51kN 1.Kxb6 +- (3.87) Tiefe: 10 00:00:00 82kN 1.Kxb6 Kh4 2.Kc5 Kg3 3.b6 Kxg2 4.b7 f3 5.b8T f2 6.Tg8+ Kf3 7.Tf8+ +- (3.87) Tiefe: 11 00:00:01 163kN 1.Kxb6 Kh4 2.Kc5 Kg3 3.b6 Kxg2 4.b7 f3 5.b8T f2 6.Tg8+ Kf3 7.Tf8+ Ke2 +- (3.87) Tiefe: 12 00:00:02 379kN 1.Kxb6 Kh4 +- (2.78) Tiefe: 13 00:00:04 613kN 1.Kxb6 Kh4 2.Kc5 Kg3 3.b6 Kxg2 4.b7 f3 +- (2.35) Tiefe: 13 00:00:07 864kN 1.Kxb6 Kh4 ² (0.56) Tiefe: 14 00:00:14 1805kN 1.Kd7 Kf5 2.Kd6 Kf6 3.Kd5 +- (2.18) Tiefe: 14 00:00:14 1862kN 1.Kc6 +- (2.96) Tiefe: 14 00:00:15 1899kN 1.Kc6 Kg4 2.Kd6 Kf5 3.Kd5 Kf6 4.Ke4 Kg5 5.Ke5 Kg4 6.Kf6 Kh4 7.Kf5 Kg3 +- (3.00) Tiefe: 15 00:00:15 1994kN 1.Kc6 Kg4 2.Kd6 Kf5 3.Kd5 Kf6 4.Ke4 Kg5 5.Ke5 Kg4 6.Kf6 Kh4 7.Kf5 +- (3.09) Tiefe: 16 00:00:18 2344kN 1.Kc6 Kg4 2.Kd6 Kf5 3.Kd5 Kf6 4.Ke4 Kg5 5.Ke5 Kg4 6.Kf6 Kh4 7.Kf5 Kg3 8.Kg5 +- (3.15) Tiefe: 17 00:00:23 3180kN Roland
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