Author: Dann Corbit
Date: 14:08:43 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] 8/8/8/5Bp1/7k/7P/4pPK1/8 b - - 0 1
>
>Here, 1. ... g4 is the only way for black to win, since everything else (except
>for 1. ... e1N, which obviously doesn't win) leaves white with the possibility
>of responding with 2.Bg4! which permanently locks up black's king and thus
>secures the draw.
>Does any program find 1. ... g4! within a reasonable amount of time?
>
>[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?
>
>[D] 6kr/8/rp1p1p1p/pPpPpPpP/P1P1P1P1/8/8/4K3 w - - 0 1
>
>It is very easy to see (for a human) that in this position 1. bxa6 is a bad
>idea. How long does your program take to understand this, too?
Crafty v18.11
White(1): st 3600
search time set to 3600.00.
White(1): epdpfga jz.epd jz.out
PFGA: EPD record: 1 ID: Janosch Zwerensky CCC #1
end-game phase
clearing hash tables
time surplus 0.00 time limit 60:00 (60:00)
nss depth time score variation (1)
11-> 1.41 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qe4+ 6. Kh2 <HT>
12 1.60 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qe4+ 6. Kh2 <HT>
12-> 2.28 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qe4+ 6. Kh2 <HT>
13 2.43 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qe4+ 6. Kh2 <HT>
13-> 3.44 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qe4+ 6. Kh2 <HT>
14 3.83 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qc7+ <HT>
14-> 7.42 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qc7+ <HT>
15 7.77 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qc7+ 9. Kg2 Qf4 <HT>
15-> 10.88 -5.20 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qc7+ 9. Kg2 Qf4 <HT>
16 11.77 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc4 8. Bf3 Qe6 9. Bg4 Qf7
16-> 19.52 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc4 8. Bf3 Qe6 9. Bg4 Qf7
17 20.75 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qd6+ 9. Kg2 Qf4 10.
Kg1 Qf7 11. Kg2
17-> 29.64 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qd6+ 9. Kg2 Qf4 10.
Kg1 Qf7 11. Kg2
18 31.99 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qd6+ 9. Kh1 Qb4 10.
Kg1 Qe7 11. Kg2 Qf7
18-> 1:01 -5.18 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Kh2 Qd6+ 9. Kh1 Qb4 10.
Kg1 Qe7 11. Kg2 Qf7
19 1:08 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 <HT>
19-> 2:11 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 <HT>
20 2:17 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Bf3 Qf5 11. Bg4 Qf7 12. Bf3
20-> 4:41 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Bf3 Qf5 11. Bg4 Qf7 12. Bf3
21 4:58 -5.16 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qd2 11. Bf3 Qc1 12. Be4 Qf4
21-> 8:02 -5.16 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qd2 11. Bf3 Qc1 12. Be4 Qf4
22 9:09 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qa4 11. Bf3 Qd7 12. Bg4 Qf7 13.
Bf3
22-> 15:59 -5.15 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qa4 11. Bf3 Qd7 12. Bg4 Qf7 13.
Bf3
23 17:47 -5.17 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qa4 11. Bf3 Qd7 12. Bg4 Qf7 13.
Bf3 Qf4
23-> 24:45 -5.17 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qa4 11. Bf3 Qd7 12. Bg4 Qf7 13.
Bf3 Qf4
24 27:42 -5.17 1. ... e1=Q 2. Bg4 Qe5 3. Kh1 Qe4+
4. Kh2 Qc2 5. Kg2 Qc1 6. Bf3 Qc8 7.
Bg4 Qc6+ 8. Bf3 Qd6 9. Bg4 Qf4 10.
Be2 Qa4 11. Bf3 Qd7 12. Bg4 Qf7 13.
Bf3 Qf4 14. Bd5
time=60:00 cpu=99% mat=3 n=705969787 fh=88% nps=196k
ext-> chk=55476445 cap=211846 pp=896606 1rep=841099 mate=118378
predicted=0 nodes=705969787 evals=170659119
endgame tablebase-> probes done=2026021 successful=2026021
Looks bleak, but Crafty was humming for quite a while on e4 when time ran out.
I suspect an overnight pounding will solve this one. I always figure that when
I can see it, so can the program at some point.
PFGA: EPD record: 2 ID: Janosch Zwerensky CCC #2
clearing hash tables
time surplus 0.00 time limit 60:00 (60:00)
nss depth time score variation (1)
9-> 17.65 2.85 1. Rh6 Be3 2. Rh7+ Kb8 3. Kc6 Bd4 4.
Rd7 Be3 5. Rb7+ Kc8 6. Rd7
10 18.94 2.85 1. Rh6 Be3 2. Rh7+ Kb8 3. Kc6 Bd4 4.
Rd7 Be3 5. Rb7+ Kc8 6. Rc7+ Kb8 7.
Rd7
10-> 23.47 2.85 1. Rh6 Be3 2. Rh7+ Kb8 3. Kc6 Bd4 4.
Rd7 Be3 5. Rb7+ Kc8 6. Rc7+ Kb8 7.
Rd7
11 24.96 2.85 1. Rh6 Be3 2. Rh7+ Kb8 3. Kc6 Bd4 4.
Rb7+ Ka8 5. Rd7 Be3 6. Kb5 Kb8 7. Kc6
11-> 29.64 2.85 1. Rh6 Be3 2. Rh7+ Kb8 3. Kc6 Bd4 4.
Rb7+ Ka8 5. Rd7 Be3 6. Kb5 Kb8 7. Kc6
12 32.92 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Re4 Bf2 4.
Rf4 Bg1 5. Rf7+ Kb8 6. Rf5 Kc7 7. Re5
12-> 36.30 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Re4 Bf2 4.
Rf4 Bg1 5. Rf7+ Kb8 6. Rf5 Kc7 7. Re5
13 38.29 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kd7 4.
Rc4 Be3 5. Re4 Bf2 6. Re2 Bg1 7. Rd2+
Kc7 8. Rd5
13-> 44.83 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kd7 4.
Rc4 Be3 5. Re4 Bf2 6. Re2 Bg1 7. Rd2+
Kc7 8. Rd5
14 47.16 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kd7 4.
Rc4 Be3 5. Rh4 Bf2 6. Rh8 Kc7 7. Rf8
Bg1 8. Re8
14-> 57.09 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kd7 4.
Rc4 Be3 5. Rh4 Bf2 6. Rh8 Kc7 7. Rf8
Bg1 8. Re8
15 1:00 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rd3
Kb8 8. Rd8+ Kc7 9. Re8
15-> 1:17 2.84 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rd3
Kb8 8. Rd8+ Kc7 9. Re8
16 1:20 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rd3
Kb8 8. Rd7 Be3 9. Kc6
16-> 1:43 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rd3
Kb8 8. Rd7 Be3 9. Kc6
17 1:50 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rh7+
Kb8 8. Rh4 Be3 9. Rh8+ Kc7 10. Rh7+
Kb8 11. Rd7
17-> 2:46 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rc4 Be3 5. Rh4 Kb7 6. Rh3 Bg1 7. Rh7+
Kb8 8. Rh4 Be3 9. Rh8+ Kc7 10. Rh7+
Kb8 11. Rd7
18 2:57 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rd1 Be3
11. Rd7
18-> 5:11 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rd1 Be3
11. Rd7
19 5:32 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Kc8 12. Re7
19-> 8:27 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Kc8 12. Re7
20 8:51 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Kc8 12. Rf7 Kb8 13. Rd7
20-> 12:37 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Kc8 12. Rf7 Kb8 13. Rd7
21 12:58 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Ka8 12. Rd7 Kb8 13. Rd3 <HT>
21-> 16:07 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Rb7+ Ka8 12. Rd7 Kb8 13. Rd3 <HT>
22 16:49 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Kb5 Bd4 12. Rh7 Be3 13. Rd7
22-> 22:36 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Be3
11. Kb5 Bd4 12. Rh7 Be3 13. Rd7
23 23:38 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Bf2
11. Rb7+ Ka8 12. Rd7 Kb8 13. Kb5 Be3
14. Kc6
23-> 35:38 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Bf2
11. Rb7+ Ka8 12. Rd7 Kb8 13. Kb5 Be3
14. Kc6
24 39:45 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Bf2
11. Rb7+ Ka8 12. Rd7 Kb8 13. Rf7 Be3
14. Rb7+ Kc8 15. Rd7
24-> 59:16 2.85 1. Rh6 Be3 2. Re6 Bd4 3. Rc6+ Kb8 4.
Rd6 Be3 5. Rd8+ Kc7 6. Rh8 Bd4 7. Rh7+
Kb8 8. Kc6 Be3 9. Rd7 Bg1 10. Rg7 Bf2
11. Rb7+ Ka8 12. Rd7 Kb8 13. Rf7 Be3
14. Rb7+ Kc8 15. Rd7
time=60:00 cpu=99% mat=2 n=656061878 fh=85% nps=182k
ext-> chk=31463293 cap=435141 pp=2437834 1rep=429947 mate=54981
predicted=0 nodes=656061878 evals=195756269
endgame tablebase-> probes done=3825333 successful=3825333
I don't have any hope for a solution to this one. In fact, when I went to Steve
Ham's web page and read those descriptions, I fell for it *each time* he said
... if you thought ... and I think this is just one of those problems that is
way beyond the reach of any computer program right now.
PFGA: EPD record: 3 ID: Janosch Zwerensky CCC #3
time surplus 0.00 time limit 60:00 (60:00) [easy move]
nss depth time score variation (1)
13 2.67 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rd7 7.
Kd3
13-> 2.67 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rd7 7.
Kd3
14 3.79 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rd7
14-> 3.79 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rd7
15 4.60 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rd7 8. Ke3
15-> 4.60 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rd7 8. Ke3
16 7.20 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Rd7
16-> 7.21 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Rd7
17 9.84 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Rd7 9. Kd3
17-> 9.87 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Rd7 9. Kd3
18 14.07 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Ra7 9. Kd3 Rd7
18-> 14.08 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Rc7 8. Ke3 Ra7 9. Kd3 Rd7
19 20.88 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Kd7 10. Ke3
19-> 20.90 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Kd7 10. Ke3
20 31.88 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke7
20-> 31.88 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke7
21 42.21 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke7 11. Kd3
21-> 42.22 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke7 11. Kd3
22 1:02 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke8 11. Kd3 Ke7
22-> 1:02 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke8 11. Kd3 Ke7
23 1:53 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke8 11. Kd3 Ke7 12. Ke3
23-> 1:53 -8.32 1. bxa6 Kf7 2. Ke2 Ra8 3. Kf3 Rxa6
4. Ke3 Ra7 5. Kd3 Ke7 6. Ke3 Rb7 7.
Kd3 Kd8 8. Ke3 Re7 9. Kd3 Rd7 10. Ke3
Ke8 11. Kd3 Ke7 12. Ke3
24 1:56 -- 1. bxa6
24 4:06 -8.71 1. bxa6 Kh7 2. Ke2 Ra8 3. Ke3 Rxa6
4. Kd3 Ra7 5. Kc3 Rc7 6. Kd3 Rc8 7.
Ke3 b5 8. cxb5 c4 9. Ke2 Kg8 10. Kd2
c3+ 11. Kd1 Rc4 12. b6 Rxe4 13. Kc2
24-> 4:08 -8.71 1. bxa6 Kh7 2. Ke2 Ra8 3. Ke3 Rxa6
4. Kd3 Ra7 5. Kc3 Rc7 6. Kd3 Rc8 7.
Ke3 b5 8. cxb5 c4 9. Ke2 Kg8 10. Kd2
c3+ 11. Kd1 Rc4 12. b6 Rxe4 13. Kc2
25 6:01 -8.79 1. bxa6 Rh7 2. Ke2 Ra7 3. Ke3 Rxa6
4. Kd3 b5 5. cxb5 Ra7 6. Kc4 Rc7 7.
Kd3 c4+ 8. Kc3 Kf7 9. Kc2 c3 10. b6
Rb7 <HT>
25-> 6:48 -8.79 1. bxa6 Rh7 2. Ke2 Ra7 3. Ke3 Rxa6
4. Kd3 b5 5. cxb5 Ra7 6. Kc4 Rc7 7.
Kd3 c4+ 8. Kc3 Kf7 9. Kc2 c3 10. b6
Rb7 <HT>
26 9:35 -- 1. bxa6
time=60:00 cpu=100% mat=-10 n=1915597850 fh=99% nps=532k
ext-> chk=343184190 cap=362099 pp=11920721 1rep=36751323
mate=32649
predicted=0 nodes=1915597850 evals=16794880
endgame tablebase-> probes done=0 successful=0
One more ply and crafty solves this one, I am sure. It had a massive fail low
on bxa6 (sat there for almost the whole hour) and so once it gets resolved
anything will look better than busting the wall
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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