Author: Paulo Soares
Date: 15:06:29 06/02/00
Go up one level in this thread
On June 02, 2000 at 13:31:53, Dann Corbit wrote:
>On June 02, 2000 at 04:37:15, Paulo Soares wrote:
>>Strange, I made a long analyse from this position and it seemed
>>that 1. g5 and 1. Kg3 are winner moves.
>>
>
>On a deep search, all three of gxh5, g5, and Kf3 fare about the same. Here are
>the positions *after* each of those choices are made, analyzed for three hours:
>
>
>6k1/8/2P5/p6p/5bP1/5K1P/2B5/8 b - - acd 20; acn 2045418075; acs 10002; ce
>-171; pv Bc7 gxh5 Kg7 Kg4 Kh6 Ba4 Be5 Bd1 Bh2 Kf5 Bc7 Ke6 Bh2 Kd7 Bf4 Kd8 Bg3
>Kd7 Kg5;
>
>6k1/8/2P5/p6P/5b2/7P/2B2K2/8 b - - acd 21; acn 2022412756; acs 10001; ce
>-161; pv Kg7 Kf3 Bc7 Kg4 Kh6 Bd1 Bd8 Kf5 Bc7 Ke6 Bh2 Kd5 Bc7 Kd4 Bb6+ Kc4 Bc7
>Bg4 Be5 Kd5 Bg3 Ke6;
>
>6k1/8/2P5/p5Pp/5b2/7P/2B2K2/8 b - - acd 21; acn 2095662806; acs 10001; ce
>-182; pv h4 Kf3 Be5 Kg4 Bg3 Ba4 Kf7 Kh5 Kg7 Bc2 Kg8 Kh6 Bf4 Bb3+ Kh8 Kh5 Bc7
>Kxh4 Bd8 Kg4 Bc7;
>
>Naturally, since we are one ply forward, we are looking for the most negative
>score. 1/5 of a pawn separates the best from the worst of the three choices.
>
>However, the first and the third positions both had fail lows at the end of
>their searchs, so these are probably the best choices.
>
>pondering disabled.
>EGTB cache memory = 6M bytes.
>hash table memory = 24M bytes.
>pawn hash table memory = 8M bytes.
>EGTB access enabled
>using tbpath=e:/crafty/release/tb,F:/KBP
>6 piece tablebase files found
>1943kb of RAM used for TB indices and decompression tables
>
>
>Crafty v17.10
>
>White(1): st 10000
>search time set to 10000.00.
>White(1): epdpfga epd.epd epd.out
>PFGA: EPD record: 1
>end-game phase
> clearing hash tables
> time surplus 0.00 time limit 166:40 (166:40)
> nss depth time score variation (1)
> 11 0.78 -1.46 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Bh2 5. h4 Bc7 6. Bd1 Bh2
> 11-> 0.98 -1.46 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Bh2 5. h4 Bc7 6. Bd1 Bh2
> 12 1.04 -- 1. ... Bc7
> 12 1.93 -1.56 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> h4 Bd8 5. Bb3 Bc7 6. Bd1 <HT>
> 12-> 2.39 -1.56 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> h4 Bd8 5. Bb3 Bc7 6. Bd1 <HT>
> 13 7.38 -1.44 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf4 Bc7+ 6. Ke4 Bb6 7. Bg4
> Bc7 8. h4
> 13-> 8.68 -1.44 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf4 Bc7+ 6. Ke4 Bb6 7. Bg4
> Bc7 8. h4
> 14 9.36 -- 1. ... Bc7
> 14 16.28 -1.84 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Bd8 4.
> Bd1 Bc7 5. Kg5 Bd8+ 6. Kf4 Bc7+ 7.
> Kf5 Bd8 8. Ke6 Kh6 9. Kd6
> 14 41.86 -1.81 1. ... Be5 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bc7 5. Kf5 a4 6. Bxa4 Kxh5 7. Ke6
> Kh4 8. Kd7
> 14-> 42.56 -1.81 1. ... Be5 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bc7 5. Kf5 a4 6. Bxa4 Kxh5 7. Ke6
> Kh4 8. Kd7
> 15 1:08 -1.84 1. ... Be5 2. gxh5 Kg7 3. Ke4 Bh2 4.
> Kd5 Kh6 5. Bd1 a4 6. Bxa4 Kxh5 7. Bd1+
> Kh4 8. Bg4 Bc7 9. Bf5
> 15 1:48 -1.80 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 a4 6. Bxa4 Kxh5 7. Bd1+
> Kh4 <HT>
> 15-> 1:53 -1.80 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 a4 6. Bxa4 Kxh5 7. Bd1+
> Kh4 <HT>
> 16 2:50 -1.80 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 a4 7. Bxa4
> Kxh5 <HT>
> 16-> 3:51 -1.80 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 a4 7. Bxa4
> Kxh5 <HT>
> 17 6:27 -1.78 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 <HT>
> 17-> 8:08 -1.78 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Ba4 <HT>
> 18 16:38 -1.73 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 Bc7 7. Ke6
> Bh2 8. Kd5 Kg7 9. Bc2 Kh6 10. Bg6
> 18-> 21:44 -1.73 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 Bc7 7. Ke6
> Bh2 8. Kd5 Kg7 9. Bc2 Kh6 10. Bg6
> 19 58:38 -1.71 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 Bc7 7. Ke6
> Bh2 8. Kd7 Bf4 9. Kd8 Bg3 10. Kd7 Kg5
> 19-> 85:08 -1.71 1. ... Bc7 2. gxh5 Kg7 3. Kg4 Kh6 4.
> Ba4 Be5 5. Bd1 Bh2 6. Kf5 Bc7 7. Ke6
> Bh2 8. Kd7 Bf4 9. Kd8 Bg3 10. Kd7 Kg5
> 20 110:51 -- 1. ... Bc7
> time=166:40 cpu=100% mat=-1 n=2045418075 fh=9% nps=204535
> ext-> checks=249624906 recaps=1915421 pawns=14036655 1rep=24278480
>thrt:90215
> predicted=0 nodes=2045418075 evals=231086920
> endgame tablebase-> probes done=2403985 successful=32940
>PFGA: EPD record: 2
> time surplus 0.00 time limit 166:40 (166:40)
> nss depth time score variation (1)
> 11 0.50 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 11-> 0.80 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 12 0.95 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 12-> 1.42 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 13 1.78 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 13-> 2.55 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bh2 5. Kf5 Bc7 6. Ke6 <HT>
> 14 5.14 -1.60 1. ... Kg7 2. Kf3 Bc7 <HT>
> 14-> 6.40 -1.60 1. ... Kg7 2. Kf3 Bc7 <HT>
> 15 10.35 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bb3 Kg7 5. Kg5 Bd8+ 6. Kf5 Kh6 7. Bd1
> Bc7 8. Ke6 <HT>
> 15-> 12.62 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bb3 Kg7 5. Kg5 Bd8+ 6. Kf5 Kh6 7. Bd1
> Bc7 8. Ke6 <HT>
> 16 26.71 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bb3 Kg7 5. Kg5 Bd8+ 6. Kf5 Kh6 7. Bd1
> Bc7 8. Ke6 <HT>
> 16-> 32.58 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bb3 Kg7 5. Kg5 Bd8+ 6. Kf5 Kh6 7. Bd1
> Bc7 8. Ke6 <HT>
> 17 1:08 -1.88 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf5 a4 6. Bxa4 Kxh5 7. Bd1+
> Kh4 8. Bg4 Bc7 9. Ke6 Kg5 10. Kd7
> 17-> 8:20 -1.88 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf5 a4 6. Bxa4 Kxh5 7. Bd1+
> Kh4 8. Bg4 Bc7 9. Ke6 Kg5 10. Kd7
> 18 10:07 -1.79 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Ba4 Bc7 6. Bc2 Bd8 7. Bd1
> Bb6 8. Bb3 <HT>
> 18-> 11:21 -1.79 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Ba4 Bc7 6. Bc2 Bd8 7. Bd1
> Bb6 8. Bb3 <HT>
> 19 17:06 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Ba4 Bc7 6. Bc2 Bd8 7. Bd1
> Bb6 8. Kf5 Bc7 9. Kf6 Bg3 <HT>
> 19-> 19:43 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Ba4 Bc7 6. Bc2 Bd8 7. Bd1
> Bb6 8. Kf5 Bc7 9. Kf6 Bg3 <HT>
> 20 36:04 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf5 Bc7 6. Kf6 Bg3 7. Ke6
> Bc7 8. Kf5 Bd6 9. Kg4 Kh7 10. Kg5 Kg7
> 11. Ba4
> 20-> 50:07 -1.60 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf5 Bc7 6. Kf6 Bg3 7. Ke6
> Bc7 8. Kf5 Bd6 9. Kg4 Kh7 10. Kg5 Kg7
> 11. Ba4
> 21 122:59 -1.61 1. ... Kg7 2. Kf3 Bc7 3. Kg4 Kh6 4.
> Bd1 Bd8 5. Kf5 Bc7 6. Ke6 Bh2 7. Kd5
> Bc7 8. Kd4 Bb6+ 9. Kc4 Bc7 10. Bg4
> Be5 11. Kd5 Bg3 12. Ke6
> time=166:40 cpu=100% mat=-2 n=2022412756 fh=3% nps=202231
> ext-> checks=97023963 recaps=1009590 pawns=22546688 1rep=2784174
>thrt:112256
> predicted=0 nodes=2022412756 evals=431137305
> endgame tablebase-> probes done=8149776 successful=131257
>PFGA: EPD record: 3
> time surplus 0.00 time limit 166:40 (166:40)
> nss depth time score variation (1)
> 10 0.62 -1.09 1. ... Kg7 2. g6 Bc7 3. Kf3 Bh2 4.
> Ke3 Bc7 5. Kd4 Bb6+ 6. Kd5 Bc7
> 10-> 0.88 -1.09 1. ... Kg7 2. g6 Bc7 3. Kf3 Bh2 4.
> Ke3 Bc7 5. Kd4 Bb6+ 6. Kd5 Bc7
> 11 1.59 -1.09 1. ... Kg7 2. g6 Bc7 3. Kf3 Bh2 4.
> Ke3 Be5 5. Ke4 Bh2 6. Kd5 Bc7
> 11-> 2.75 -1.09 1. ... Kg7 2. g6 Bc7 3. Kf3 Bh2 4.
> Ke3 Be5 5. Ke4 Bh2 6. Kd5 Bc7
> 12 4.97 -1.11 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. Ke3 Bg3 6. Bf5 Bc7 7. g6
> 12-> 7.68 -1.11 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. Ke3 Bg3 6. Bf5 Bc7 7. g6
> 13 11.51 -1.14 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 Kf6 6. Ke3 a4 7. g7 Kxg7
> 8. Bxa4
> 13-> 15.90 -1.14 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 Kf6 6. Ke3 a4 7. g7 Kxg7
> 8. Bxa4
> 14 20.95 -1.14 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 Kf6 6. Ke3 a4 7. Bxa4
> Kxg6 8. Bb3
> 14-> 30.60 -1.14 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 Kf6 6. Ke3 a4 7. Bxa4
> Kxg6 8. Bb3
> 15 46.04 -1.15 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 a4 6. Bxa4 Kxg6 7. Bc2+
> Kg5 8. Ke4 Kf6 9. Kd5
> 15-> 1:07 -1.15 1. ... Kg7 2. Kf3 Bh2 3. Ke3 Bc7 4.
> Kd4 h4 5. g6 a4 6. Bxa4 Kxg6 7. Bc2+
> Kg5 8. Ke4 Kf6 9. Kd5
> 16 1:32 -- 1. ... Kg7
> 16 47:00 -2.02 1. ... Kg7 2. Kf3 Bc7 3. h4 Bb8 4.
> Ke4 Kg6 5. Kd5+ Kf7 6. Bd1 Kf8 7. Bxh5
> a4 8. g6 Bg3 9. Bd1 a3
> 16 50:24 ++ 1. ... h4!!
> 16 50:54 -1.53 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Ke6 a4 7. Bxa4
> Kxg6 8. Bc2+ Kg5 9. Kd7 Be5 10. Be4
> 16-> 51:04 -1.53 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Ke6 a4 7. Bxa4
> Kxg6 8. Bc2+ Kg5 9. Kd7 Be5 10. Be4
> 17 51:41 -1.60 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Ke6 a4 7. Kd7
> a3 8. Bb1 a2 9. Bxa2 Kxg6 10. Bb1+
> Kg5 11. Be4
> 17-> 52:52 -1.60 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Ke6 a4 7. Kd7
> a3 8. Bb1 a2 9. Bxa2 Kxg6 10. Bb1+
> Kg5 11. Be4
> 18 54:44 -1.60 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Kg5 Bd6 7. Kxh4
> a4 8. Bxa4 Kxg6 9. Bc2+ Kf6 10. Kg4
> Bc7 11. Bf5
> 18-> 58:41 -1.60 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Kg5 Bd6 7. Kxh4
> a4 8. Bxa4 Kxg6 9. Bc2+ Kf6 10. Kg4
> Bc7 11. Bf5
> 19 65:12 -1.58 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Kg5 Bc7 7. Kxh4
> a4 8. Bxa4 Kxg6 9. Kg4 Kf6 10. h4 Ke5
> 11. h5
> 19-> 74:46 -1.58 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Kf5 Kf7 5. g6+ Kg7 6. Kg5 Bc7 7. Kxh4
> a4 8. Bxa4 Kxg6 9. Kg4 Kf6 10. h4 Ke5
> 11. h5
> 20 88:26 -1.82 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Ba4 Kf7 5. Kh5 Kg7 6. Bc2 Kg8 7. Kh6
> Bf4 8. Bb3+ Kh8 9. Kh5 Bc7 10. Kxh4
> Bd8 11. Kg4 Bc7
> 20-> 125:22 -1.82 1. ... h4 2. Kf3 Be5 3. Kg4 Bg3 4.
> Ba4 Kf7 5. Kh5 Kg7 6. Bc2 Kg8 7. Kh6
> Bf4 8. Bb3+ Kh8 9. Kh5 Bc7 10. Kxh4
> Bd8 11. Kg4 Bc7
> 21 126:43 -- 1. ... h4
> time=166:40 cpu=99% mat=-1 n=2095662806 fh=14% nps=209554
> ext-> checks=227510789 recaps=628105 pawns=16403120 1rep=11235336
>thrt:96399
> predicted=0 nodes=2095662806 evals=169751199
> endgame tablebase-> probes done=1356541 successful=9507
>Black(1): quit
>execution complete.
I think the better way to analyse a position is( I wrote this in another post):
1. To give a long time so that only the program analyzes
the position.
2. To analyze for a long time, with the help of the program,
the chosen program move, and other moves that are interesting in the
player's opinion.
After seeing the good results gotten by Uri in Israel Correspondence
Championship, I am believing more in programs, although I don't have a lot
of patience to leave the program to analyze a position for 8 hours, because
I like to analyse from the way of item 2, even without to know the
choosen program move after some hours.
Below I placed some analyses that I did with the help of Fritz6a, without
leaving the program to analyze for a long time.
I think that 1. Kf3 and 1. g5, are winner moves and gxh5 it's a draw. This
seems to be in agreement with your way to analyze positions.
1. Kf3 (1. gxh5 Kg7 2. Kf3 Bb8 3. Kg4 Kh6 4. Bd1 Bh2 5. Kf5 a4 6. Bxa4 Kxh5 7.
Bd1+ Kh6 8. Kf6 Bg3 9. Bf3 Bc7 10. Kf7 Kh7 11. h4 Kh8 12. h5 Kh7 13. Ke8 Bf4
14. Kd7 Be5 {=}) (1. g5 h4 (1... Kf7 2. Kf3 Bd6 3. h4 Ke6 (3... Kg7 4. Ke4 Kf8
5. Kf5 Kf7 6. g6+ Kg7 7. Kg5 {+-}) 4. Ke4 Bc7 5. Bb3+ Ke7 6. Kf5 Bg3 7. g6 {+-}
) 2. Kf3 Bg3 3. Kg4 Kf7 (3... Kg7 4. Kh5 Kf7 5. Kh6 {+-}) 4. g6+ Kf6 5. Kh5 Kg7
6. Kg5 {+-}) 1... Bc7 2. g5 h4 (2... Kf7 3. h4 Ke6 4. Ke4 Bb6 5. Bb3+ Ke7 6.
Kf5 {+-}) (2... Kg7 3. h4 Kf7 4. Ke4 Kf8 5. Kf5 Kg7 6. Ke6 Bb8 7. Kd7 {+-}) 3.
Kg4 Bg3 4. g6 Kf8 (4... Kh8 5. Kf5 Kg7 6. Kg5 {+-}) (4... Kg7 5. Kg5 {+-}) 5.
Kf5 Kg7 6. Kg5 $18 Bc7 7. Kxh4 a4 8. Kg5 (8. Bxa4 Kxg6 {=}) 8... a3 9. Bb3 Bd8+
10. Kf5 Kh6 11. h4 Kg7 12. h5 {+-}
Paulo
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