Author: Slater Wold
Date: 16:59:46 09/18/01
Go up one level in this thread
On September 18, 2001 at 13:44:33, Janosch Zwerensky wrote:
>Hi everyone,
>
>I don't expect that currently any program can solve one of these problems given
>less than weeks of reflection time, but I'd like to know anyway what different
>progs say:
>
>
>[D] 8/2k5/1p4R1/1K6/P2b4/8/8/8 w - - 0 1
>
>This one is from the Ham vs. Fritz6 correspondence match. Fritz6 failed to win
>this position, but Ham showed, with the help of others, that it could in fact
>have won, with the strongest move being 1. Ka6! (for details see Ham's analysis
>on white's 56th move in Fritz6 vs. Ham at
>http://correspondencechess.com/campbell/ham/fr_hambl.htm ).
>
>(a) Does any program want to play Ka6 at any reasonable time control?
>(b) Is any program capable of winning this ending against a top chess engine,
>when the latter gets at least a few seconds to choose its moves?
Once again, not reasonable, but found it. Again, with Crafty:
search time set to 7200.00.
White(1): epdpfga test.epd test.out
PFGA: EPD record: 1 ID: test.1
end-game phase
clearing hash tables
time surplus 0.00 time limit 120:00 (120:00)
nss depth time score variation (1)
starting thread 1
(2) 9 0.16 2.57 1. Re6 Kd7 2. Re2 Kc7 3. Rc2+ Kb7 4.
Rd2 Be5 5. Rd7+ Bc7 6. Kb4
9 0.19 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
(2) 9-> 0.21 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
10 0.24 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
(4) 10-> 0.30 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
(3) 11 0.33 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
(4) 11-> 0.47 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Rg7 Bd4 6. Rd7 <HT>
(3) 12 0.54 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bc5 6. Rb7+ Ka8 7.
Rd7 Kb8 8. a5
(4) 12-> 0.72 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bc5 6. Rb7+ Ka8 7.
Rd7 Kb8 8. a5
(3) 13 0.83 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Kb5 Bd4 7.
Rd7 Bc5 8. a5
(4) 13-> 1.13 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Kb5 Bd4 7.
Rd7 Bc5 8. a5
(3) 14 1.27 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rd7 Kb8 8. Kb5 Bc5 9. a5 <HT>
(4) 14-> 1.97 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rd7 Kb8 8. Kb5 Bc5 9. a5 <HT>
(3) 15 2.24 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rd7 Kb8 8. Kb5 Bc5 9. a5 Kc8
(4) 15-> 3.85 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rd7 Kb8 8. Kb5 Bc5 9. a5 Kc8
(3) 16 4.55 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Kb5 Bg1 9. Rd7 Bc5 10. a5
<HT>
(4) 16-> 14.24 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Kb5 Bg1 9. Rd7 Bc5 10. a5
<HT>
(3) 17 15.04 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Kb5 Bg1 9. Rd7 Bc5 10. a5
Kc8
(4) 17-> 24.04 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Kb5 Bg1 9. Rd7 Bc5 10. a5
Kc8
(3) 18 25.16 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Kb5 Bc5
(4) 18-> 42.14 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Kb5 Bc5
(3) 19 44.21 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Be3 9. Rb7+ Ka8 10.
Rh7 Bd4 11. Kd5 Bc3 12. Rc7
(4) 19-> 1:08 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Be3 9. Rb7+ Ka8 10.
Rh7 Bd4 11. Kd5 Bc3 12. Rc7
(3) 20 1:10 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Be3 9. Rb7+ Ka8 10.
Rh7 Bd4 11. Rd7 Be3 12. Kb5 Bc5
(3) 20-> 2:18 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Be3 9. Rb7+ Ka8 10.
Rh7 Bd4 11. Rd7 Be3 12. Kb5 Bc5
(2) 21 2:22 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Kd6 Bd4 12. Kc7 Bc5 13.
Kc6
(4) 21-> 3:42 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Kd6 Bd4 12. Kc7 Bc5 13.
Kc6
(3) 22 3:50 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Re7 Bg1 12. Kb5 Bd4 13.
Kc4 Bc5
(3) 22-> 5:36 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Re7 Bg1 12. Kb5 Bd4 13.
Kc4 Bc5
(2) 23 5:49 2.83 1. Rc6+ Kb7 2. Rd6 Be3 3. Rd7+ Ka8
4. Kc6 Kb8 5. Re7 Bf2 6. Rb7+ Ka8 7.
Rh7 Kb8 8. Rg7 Bd4 9. Rb7+ Ka8 10.
Rd7 Be3 11. Rd8+ Ka7 12. Kb5 Kb7 13.
Rd3 Bf2 14. Rd7+ Ka8 15. Kc6 Bc5
23 10:49 ++ 1. Ka6!!
23 10:50 3.23 1. Ka6 Bf2 2. Rg5 Kb8 3. Rb5 Kc8 4.
Ka7 Bd4 5. Rb4 Bf2 6. Rc4+ Kd7 7. Kb7
Bg1 8. Rc7+ Kd6 9. Rh7 Ke6 10. Ka6
Kf5 11. Rh6 Bd4 12. Rxb6 Ke4 13. Rd6
(4) 23-> 11:00 3.23 1. Ka6 Bf2 2. Rg5 Kb8 3. Rb5 Kc8 4.
Ka7 Bd4 5. Rb4 Bf2 6. Rc4+ Kd7 7. Kb7
Bg1 8. Rc7+ Kd6 9. Rh7 Ke6 10. Ka6
Kf5 11. Rh6 Bd4 12. Rxb6 Ke4 13. Rd6
24 12:26 ++ 1. Ka6!!
(3) 24 12:47 3.63 1. Ka6 Bf2 2. Rg5 Kb8 3. Rb5 Kc8 4.
Rf5 Bd4 5. Rf8+ Kc7 6. Rf4 Bg1 7. Rf7+
Kc6 8. Rh7 Bc5 9. Rh8 Bg1 10. Rc8+
Kd5 11. Rd8+ Kc4 12. Rb8 Kb3 13. a5
Bh2 14. Rb7 Be5 15. axb6
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