Author: Uri Blass
Date: 16:29:49 04/07/04
Go up one level in this thread
On April 07, 2004 at 18:52:37, Dieter Buerssner wrote:
>On April 07, 2004 at 17:42:07, Dieter Buerssner wrote:
>
>>Phantastic by Patzer. I wonder, what magic he is doing here. I first thought,
>>very aggressively extending pawn endgame positions (when the root position is
>>not a pawn endgame) should help. But it is still rather deep, when the Qs are
>>already from the board. Very impressive.
>
>Seems to work to aggressively extend pawn endgames. I added about 4 lines of
>code to Yace. When the root position is not a pawn endgame, and the current
>position is a pawn endgame, extend 1/2 ply. This is additionally to some other
>extension I already have, when trading down to a pawn endgame. Now I get:
>
> 46419606 1:00.0 0.60 13t 1.Qd6+ Kf5 2.Qd7+ Kf6 3.c6 Qe1 4.Qh3 Qa5 5.Qc8
> Qe1 6.Qd8+ Kf5 7.Qd5+H Kf6H 8.Qd4+H Ke7H 9.c7H
> Qg3+H 10.Kg1H Qe1+H {HT} {0}
> 62198227 1:19.4 0.61 13t+ 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 e2+ 4.Kxe2 Kg6 5.c6
> Kf5 6.g4+ Ke6 7.Ke3 Ke7 8.Ke4 f5+ 9.gxf5 Ke8
> 10.f4 g4 11.c7 Kd7 12.f6 Kc8 13.Kd4 g3 14.Ke5
> g2 15.f7 g1=Q 16.f8=Q+ Kxc7 {80}
> 64671720 1:22.4 1.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
> 5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
> 9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
> Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H 15.Kxf5H {HT}
> {80}
> 66202720 1:24.4 2.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
> 5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
> 9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
> Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H 15.Kxf5H {HT}
> {80}
> 74338752 1:33.5 7.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
> 5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
> 9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
> Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H {HT} {0}
> 85856005 1:46.3 8.00 13t 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
> 5.Kxe3 f5 6.c6 Kxc6 7.f4 g4H 8.Kd4H Kd6H 9.g3H
> Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H Kg7H
> 13.Ke5H Kh6H 14.Kxf5H Kh7H 15.Kf6H {HT} {80}
> 87070103 1:47.9 8.00 13. 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
> 5.Kxe3 f5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
> 10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg7 13.Ke5 Kh6
> 14.Kxf5 Kh7 15.Kf6 {HT} {80}
For comparison here is yace search after 1.Qxe3 fxe3 with 64 mbytes hash
You can see that yace searched more nodes only in the pawn endgame(not in the
queen endgame) and needed clearly more nodes only to get
+2.15 score and it later failed low.
a lot of the tablebases are missing including part of the 4 piece tablebases but
not the KPP vs KP
I do not understand how did you get +8 score so quickly from the root
position(extending transition to pawn endgame does not seem to be the
explanation).
New game
8/5p2/6k1/2P3p1/8/4pP2/6PK/8 w - - 0 1
Analysis by Yace Paderborn:
2.c6
³ (-0.33) Depth: 1 00:00:00
2.c6
³ (-0.33) Depth: 1 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q
= (0.11) Depth: 2 00:00:00
2.c6 e2 3.c7 e1Q
= (0.11) Depth: 2 00:00:00
2.c6 e2 3.c7 e1Q
= (0.11) Depth: 2 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q
= (-0.07) Depth: 3 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q
= (-0.07) Depth: 3 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q Qe2
= (-0.09) Depth: 4 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q Qe2
= (-0.09) Depth: 4 00:00:00
2.c6 e2 3.c7 e1Q 4.c8Q Kf6 5.Qd7
= (-0.14) Depth: 5 00:00:00
2.Kg1 Kf6 3.c6 Ke6 4.c7 Kd7
= (-0.13) Depth: 5 00:00:00
2.Kg1 Kf6 3.c6 Ke6 4.c7 Kd7
= (-0.13) Depth: 5 00:00:00
2.Kg1 Kf6 3.c6 Ke6 4.c7 Kd7
= (-0.13) Depth: 5 00:00:00
2.Kg1 Kf6 3.Kf1 g4 4.fxg4 Ke5
³ (-0.26) Depth: 6/10 00:00:00 5kN
2.c6 e2 3.c7 Kf6 4.c8Q Ke5
= (-0.25) Depth: 6/10 00:00:00 6kN
2.c6 e2 3.c7 e1Q 4.c8Q Qh4+ 5.Kg1 Kf6
= (-0.16) Depth: 6/10 00:00:00 8kN
2.c6 e2 3.c7 e1Q 4.c8Q Qh4+ 5.Kg1 Kf6
= (-0.16) Depth: 6/13 00:00:00 9kN
2.c6 e2 3.c7 e1Q 4.c8Q Kf6 5.Qd7 Qe6 6.Qc7
= (-0.12) Depth: 7/13 00:00:00 13kN
2.Kg1 f5 3.c6 f4 4.c7 Kf7 5.c8Q e2
= (-0.11) Depth: 7/13 00:00:00 16kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.Kxe3 Kxc5
= (-0.06) Depth: 7/13 00:00:00 18kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.Kxe3 Kxc5
= (-0.06) Depth: 7/14 00:00:00 19kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.c6 Kxc6
= (0.02) Depth: 8/14 00:00:00 26kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.c6 Kxc6
= (0.02) Depth: 8/14 00:00:00 28kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.c6 Kxc6 6.Kxe3
= (0.02) Depth: 9/14 00:00:00 41kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.c6 Kxc6 6.Kxe3
= (0.02) Depth: 9/16 00:00:00 45kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.Kxe3 f6 6.c6 Kxc6
= (0.11) Depth: 10/16 00:00:00 67kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5 5.Kxe3 f6 6.c6 Kxc6
= (0.11) Depth: 10/19 00:00:00 74kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 Kd5
= (-0.01) Depth: 11/19 00:00:01 115kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 Kd5
= (-0.01) Depth: 11/19 00:00:01 136kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 12/19 00:00:01 206kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 12/20 00:00:01 226kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 13/20 00:00:02 335kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f4 g4 9.f6 Kd6
10.f5 g3 11.f7 Ke7
= (0.00) Depth: 13/23 00:00:02 372kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 14/23 00:00:03 568kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 14/24 00:00:03 636kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f4 g4 9.f6 Kd6
10.f5 g3 11.f7 Ke7
= (0.00) Depth: 15/24 00:00:05 936kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f4 g4 9.f6 Kd6
10.f5 g3 11.f7 Ke7
= (0.00) Depth: 15/26 00:00:06 1052kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 16/26 00:00:08 1675kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f4 g4 9.f6 Kd6
10.f5 g3 11.f7 Ke7
= (0.00) Depth: 16/26 00:00:09 1969kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 17/28 00:00:13 2924kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 17/28 00:00:15 3412kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f4 g4 9.f6 Kd6
10.f5 g3 11.f7 Ke7
= (0.00) Depth: 18/28 00:00:20 5080kN
2.Kg1 Kf6 3.Kf1 Ke6 4.g4 Kd5 5.Ke2 Kxc5 6.Kxe3 f5 7.gxf5 Kd5 8.f6 Ke6 9.f7 Kxf7
10.f4 g4 11.f5 g3 12.f6 g2 13.Kf2
= (0.00) Depth: 18/29 00:00:23 6046kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4
= (0.06) Depth: 19/31 00:00:34 9135kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4
= (0.06) Depth: 19/31 00:00:38 10460kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6
= (0.06) Depth: 20/32 00:00:49 14759kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6
= (0.06) Depth: 20/32 00:01:03 19891kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd4
= (0.03) Depth: 21/37 00:01:24 28002kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd4
= (0.03) Depth: 21/37 00:01:43 35632kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg6
= (0.15) Depth: 22/37 00:02:32 53432kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg6
= (0.15) Depth: 22/37 00:03:00 64055kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf7 12.Ke5 Kg6
= (0.18) Depth: 23/39 00:04:28 97089kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf7 12.Ke5 Kg6
= (0.18) Depth: 23/39 00:05:22 114537kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 f4+ 7.Kd3 g4 8.fxg4 Ke5 9.c7 f3
10.c8Q f2
² (0.58) Depth: 24/40 00:07:37 161853kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 f4+ 7.Kd3 g4 8.fxg4 Ke5 9.c7 f3
10.c8Q f2 11.Ke3 f1R
+- (1.58) Depth: 24/40 00:08:01 170622kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7
+- (2.15) Depth: 24/40 00:08:31 180833kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7
+- (2.15) Depth: 24/40 00:09:49 209801kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.c6 f4 6.g3 Kd6 7.Kd3 e2 8.c7 e1Q 9.c8Q
+- (1.75) Depth: 25/40 00:10:21 221314kN
2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 f5 5.Kxe3 Kd5 6.c6 Kc5 7.f4 Kb6 8.fxg5 Kc7 9.Kd3 f4
10.g6 Kd6 11.c7 f3 12.c8Q
+- (1.73) Depth: 25/40 00:12:00 257597kN
(Blass, Tel-Aviv 08.04.2004)
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