Author: Dann Corbit
Date: 15:09:06 10/09/01
Go up one level in this thread
On October 09, 2001 at 13:01:13, Uri Blass wrote:
>[D]8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - - 0 61
>
>This position is from the game Tao-Deep Junior7 in the last WMCCC
>
>Chest need some hours on p200 to see mate in 10(I used chest by the way that was
>explained by paul some days ago
>
>see http://www.icdchess.com/forums/1/message.shtml?191857
>
>Solution:61...Rg3 62.Kd4 h3 63.Kd5 h2 64.b8Q Rxb8 65.Re1 Rd3+ 66.Kc4 h1Q 67.Re5+
>Kxe5 68.Kxd3 Qd1+ 69.Kc3 Rb3+ 70.Kc4 Qc2#
>
>15961 seconds,292,407,791 nodes
>
>In the game Deep Junior7 missed the right move(Rg3) but it did not help Tao that
>resigned after Rxb7.
>
>How much time does your program need to see mate in 10 with the full 5 piece
>tablebases and without tablebases?
Here is the CM8000 verbose explanation:
"Analysis: You move your rook to g3, which moves it behind the passed pawn at
g2. White counters with rook to d1. Your rook captures pawn, which removes the
promote threat at b7. White responds by moving rook to d5, which checks your
king. You move your king to e4, which moves it out of check. White counters by
moving the rook to d4, which checks your king. You move your king to e5, which
moves it out of check. White responds by moving rook to d5, which checks your
king. You move your king to e6, which moves it out of check. White replies by
moving the rook to d1. You move your rook to c7, which checks White's king.
White responds with the king to b4, which moves it out of check. You move your
pawn to g1 with a queen promotion, which threatens White's rook. White counters
with rook captures queen. Your rook captures rook. White responds by moving king
to a3. You move your pawn to h3, which pushes the passed pawn. White responds by
moving the king to a4. You move your pawn to h2, which adds a promote threat at
h2. White counters by moving the king to a5. You move your pawn to h1 with a
queen promotion.
As a result of this line of play, you win a rook and a pawn. Additionally, you
gain a queen through promotion. Also, White's King is driven away from the
middle of the board. With this material, you should be able to force a mate."
Here is the SAN output for CM8000:
Time Depth Score Positions Moves
9:09 10/11 -20.85 91605523 1...Rg3 2. Rd1 Rxb7 3. Rd5+ Ke4 4. Rd4+ Ke5 5. Rd5+
Ke6 6. Rd1 Rc7+ 7. Kb4 g1=Q 8. Rxg1 Rxg1 9. Ka3 h3 10. Ka4 h2 11. Ka5 h1=Q
Here is YACE output (with 5 man EGTB) {another process was using a lot of CPU
time, so it is not representitive of true performance}:
black ( 1): test m10.ci
title position 1
Stored 0 learned positions into hash table
solution Rg3
usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
2 0.006 6.82 1t 1...Rxb7 2.Rxg2 {580}
18 0.013 7.22 1t 1...Rg3 {580}
44 0.029 7.22 1. 1...Rg3 {580}
110 0.036 8.88 2++ 1...Rg3 2.Kd5 Rxb7 {660}
127 0.042 8.88 2t 1...Rg3 2.Kd5 {580}
364 0.049 8.88 2. 1...Rg3 2.Kd5 {580}
467 0.055 8.88 3t 1...Rg3 2.Kd5 Rxb7 {660}
1081 0.063 8.88 3. 1...Rg3 2.Kd5 Rxb7 {660}
1872 0.071 9.03 4t 1...Rg3 2.b8=Q Rxb8 3.Kd5 {660}
2978 0.079 9.03 4. 1...Rg3 2.b8=Q Rxb8 3.Kd5 {660}
5462 0.090 9.30 5t 1...Rg3 2.Kd5 h3 3.b8=Q Rxb8H {660}
10346 0.105 9.31 5t+ 1...Rhb3 2.Ra1 Rxb7 3.Rg1
11647 0.116 9.32 5t 1...Rhb3 2.b8=Q Rxb8 3.Kd5 Rd2+ 4.Kc5H {660}
13117 0.125 9.32 5. 1...Rhb3 2.b8=Q Rxb8 3.Kd5 Rd2+ 4.Kc5 {660}
15235 0.135 9.34 6t 1...Rhb3 2.b8=Q Rxb8 3.Kd4 h3 4.Ke3 {660}
26234 0.158 9.34 6. 1...Rhb3 2.b8=Q Rxb8 3.Kd4 h3 4.Ke3 {660}
30880 0.178 9.78 7++ 1...Rhb3 2.b8=Q Rxb8 3.Kd5 h3 4.Re1
47205 0.228 12.75 7t 1...Rhb3 2.Kd5 h3 3.Kd6 Rb6+ 4.Ke7 Rxb7+ 5.Kd6
Rd2+H 6.Kc5H {660}
56180 0.260 12.75 7. 1...Rhb3 2.Kd5 h3 3.Kd6 Rb6+ 4.Ke7 Rxb7+ 5.Kd6
Rd2+ 6.Kc5 {660}
94364 0.347 12.76 8t 1...Rhb3 2.b8=Q Rxb8 3.Kd4 h3 4.Ke3 R8b3+ 5.Kd4
{660}
119389 0.445 12.76 8. 1...Rhb3 2.b8=Q Rxb8 3.Kd4 h3 4.Ke3 R8b3+ 5.Kd4
{660}
169069 0.586 13.16 9++ 1...Rhb3 2.b8=Q Rxb8 3.Ra1 h3 4.Ra5+ Kf6 5.Ra6+
Kf7 6.Ra7+ Kf8 7.Rg7
372296 1.023 15.24 9t 1...Rhb3 2.Kd5 h3 3.Re1 h2 4.Re5+ Kg6 5.b8=Q
Rxb8H 6.Re6+H Kf7H 7.Kd6H h1=QH {1581}
458246 1.228 15.24 9. 1...Rhb3 2.Kd5 h3 3.Re1 h2 4.Re5+ Kg6 5.b8=Q
Rxb8 6.Re6+ Kf7 7.Kd6 h1=Q {1581}
638929 1.590 14.84 10-- 1...Rhb3 2.b8=Q Rxb8
767410 1.877 14.84 10t 1...Rhb3 2.b8=Q Rxb8H 3.Ra1H Rb1H 4.Ra5+H Kf6H
5.Ra6+H Kf7H 6.Kd5H g1=QH 7.Re6H {1581}
880274 2.111 14.85 10t+ 1...Rc3+ 2.Kxc3 Rxb7 3.Ra1 g1=Q 4.Ra5+ Ke4
5.Ra4+ Ke5 6.Ra5+ Kf4 7.Kc4 Ke4 8.Rf5 Kxf5 9.Kd5
884320 2.132 15.64 10++ 1...Rc3+ 2.Kxc3 Rxb7 3.Ra1 g1=Q 4.Ra5+ Ke4
5.Ra4+ Ke5 6.Ra5+ Kf4 7.Kc4 Ke4 8.Rf5 Kxf5 9.Kd5
1760747 3.627 Mat37 10t 1...Rc3+ 2.Kxc3 Rxb7 3.Rd1 g1=Q 4.Rd8 Qd4+
5.Kxd4 {EGTB} {80}
1834213 3.754 Mat37 10. 1...Rc3+ 2.Kxc3 Rxb7 3.Rd1 g1=Q 4.Rd8 Qd4+
5.Kxd4 {EGTB} {80}
3382329 8.166 Mat29 11t 1...Rc3+ 2.Kxc3 Rxb7 3.Kc2 Rb1 4.Rxg2 {EGTB}
{80}
3557833 8.665 Mat29 11. 1...Rc3+ 2.Kxc3 Rxb7 3.Kc2 Rb1 4.Rxg2 {EGTB}
{80}
8707961 21.394 Mat28 12t 1...Rc3+ 2.Kxc3 Rxb7 3.Kc2 h3 4.Ra1 g1=Q 5.Ra5+
Qc5+ 6.Rxc5+H {EGTB} {80}
12128492 32.324 Mat28 12. 1...Rc3+ 2.Kxc3 Rxb7 3.Kc2 h3 4.Ra1 g1=Q 5.Ra5+
Qc5+ 6.Rxc5+ {EGTB} {80}
49010361 1:52.1 Mat28 13t 1...Rc3+ 2.Kxc3 Rxb7 3.Rd1 g1=Q 4.Rxg1 {EGTB}
{80}
133269956 4:40.3 Mat28 13. 1...Rc3+ 2.Kxc3 Rxb7 3.Rd1 g1=Q 4.Rxg1 {EGTB}
{80}
Crafty:
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
8 0.40 -13.73 1. ... Rhb3 2. Kd5 h3 3. b8=Q Rd2+
4. Kc6 Rxb8 5. Kc7 Rbd8
8-> 1.20 -13.73 1. ... Rhb3 2. Kd5 h3 3. b8=Q Rd2+
4. Kc6 Rxb8 5. Kc7 Rbd8
9 1.45 ++ 1. ... Rhb3!!
9 5.57 -25.54 1. ... Rc3+ 2. Kxc3 Rxb7 3. Ra1 g1=Q
4. Ra5+ Qc5+ 5. Kd3 Qxa5 6. Kd4 Qd2+
7. Kc5 h3
9-> 5.96 -25.54 1. ... Rc3+ 2. Kxc3 Rxb7 3. Ra1 g1=Q
4. Ra5+ Qc5+ 5. Kd3 Qxa5 6. Kd4 Qd2+
7. Kc5 h3
10 6.05 ++ 1. ... Rc3+!!
10 6.65 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1
4. Rxg2 <HT>
10-> 12.97 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1
4. Rxg2 <HT>
11 15.10 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1
4. Rxg2 <HT>
11-> 34.94 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1
4. Rxg2 <HT>
12 39.02 -Mat28 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 h3
4. Ra1 g1=Q 5. Ra5+ Qc5+ 6. Rxc5+ <HT>
12-> 1:47 -Mat28 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 h3
4. Ra1 g1=Q 5. Ra5+ Qc5+ 6. Rxc5+ <HT>
13 2:10 -Mat28 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kd4 h3
4. Rc1 g1=Q+ 5. Rxg1 <HT>
13 3:32 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+
4. Kxc3 <HT>
13-> 7:13 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+
4. Kxc3 <HT>
14 8:50 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+
4. Kxc3 <HT>
ExChess seems to use tablebase files differently:
Starting search on position:
8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - -
Target search time: 99900
Starting depth: 1
Game stage: 3
1. 7.62 0 35814 1. ... Rg3
1. 7.77 0 35855 1. ... Rhb3
2. ++ 0 35906 1. ... Rg3
2. 10.58 0 36042 1. ... Rg3 2. b8=Q Rxb8
3. ++ 0 36127 1. ... Rg3
3. 10.98 0 36471 1. ... Rg3 2. Rxg2 Rg4+ 3. Kd3 Rgxg2
4. ++ 0 36830 1. ... Rg3
4. 11.81 0 37173 1. ... Rg3 2. Kd4 h3
5. ++ 0 37869 1. ... Rg3
5. 12.52 0 39627 1. ... Rg3 2. Ra1 h3 3. Ra5+ Ke4 4. Rb5
6. ++ 0 40557 1. ... Rg3
6. 13.94 0 59688 1. ... Rg3 2. Rxg2 Rgxg2 3. Kd3 Rxb7
7. ++ 0 79016 1. ... Rg3
7. 14.66 0 154773 1. ... Rg3 2. Re1 h3 3. Re2 Rg4+ 4. Kd5 Rxb7
8. ++ 1 212560 1. ... Rg3
8. 15.65 2 357285 1. ... Rg3 2. Kd4 h3 3. Re1 h2 4. Re5+ Kf6 5. Ke4
g1=Q 6. Rf5+ Ke6
9. 15.88 6 730408 1. ... Rg3 2. Kd5 h3 3. Re1 h2 4. Re5+ Kf6 5. Re6+
Kf7 6. Rh6 g1=Q 7. Rh7+ Ke8
10. ++ 13 1271985 1. ... Rg3
10. --
10. 18.38 22 2396453 1. ... Rg3 2. Kd5 h3 3. Re1 g1=Q 4. Re5+ Kg6 5.
Re6+ Kf7 6. Re4 h2
11. ++ 42 4253187 1. ... Rg3
11. 19.63 51 5972861 1. ... Rg3 2. Ra1 g1=R 3. Ra5+ Ke4 4. Kc5 Rg5+ 5.
Kd6 Rxa5 6. b8=Q Rxb8 7. Kc7 Rba8
12. ++ 55 6447530 1. ... Rg3
12. 25.16 76 9090045 1. ... Rg3 2. Kd5 Rxb7 3. Kc6 Rb1 4. Kd7 Rxg1 5.
Ke8 h3 6. Kf7 h2 7. Kf8 h1=Q 8. Kf7
13. 25.38 83 10076034 1. ... Rg3 2. Kd5 Rxb7 3. Kc6 Rb1 4. Kd7 Rxg1 5.
Ke8 h3 6. Kf7 h2 7. Kf8 Rf1 8. Kf7 g1=Q
13. ++ 274 24013665 1. ... Rh1
13. MATE+ 476 58650182 1. ... Rh1 2. Rxg2 Rc1+ 3. Kd4 Rb4+ 4. Kd3 Rc3+ 5.
Kxc3 Rxb7
node_count = 58660899 quiescent nodes = 235809 eval_count = 35965974
hash hits = 8455602 hash moves = 705636 pawn hash hits = 35892298
node_rate = 122976 null cuts = 3610319 exten = 4207357 int_iter = 144
egtb_probes = 476311 egtb_hits = 476311
Return move from search: Rh1
Pepito (even with tablebase files) sticks with Rg3 and finds mate during ply 15
at about two and a half minutes. I believe that 9981 is mate in 18 found so
far.
5 884 92 3421 Th3-b3 !!
5 1084 93 5931 Th3-b3 !!
5 1221 93 9032 Th3-b3 Tg1xg2 Tb2xg2 Rc4xb3 Tg2-g8
5 1221 94 11829 Th3-b3 Tg1xg2 Tb2xg2 Rc4xb3 Tg2-g8
6 1188 99 32855 Th3-b3 ?? Tg1xg2 Tb2xg2 Rc4xb3 Tg2-g8
6 1124 101 44531 Th3-b3 Tg1-d1 h3 Td1-d5 Rf5-e4 b8=D Tb3-b4 Db8xb4 Tb2xb
4
6 1124 103 53190 Th3-b3 Tg1-d1 h3 Td1-d5 Rf5-e4 b8=D Tb3-b4 Db8xb4 Tb2xb
4
7 1157 105 58523 Th3-b3 !!
7 1240 108 75615 Th3-b3 Tg1xg2 Tb2xg2 Rc4xb3 Tg2-g8 Rb3-c4 Tg8-b8
7 1357 110 84596 Th3-g3 !!
7 1590 124 160089 Th3-g3 Rc4-c5 h3 Rc5-c6 Tg3-c3 Rc6-d6 Tc3-b3 Rd6-d5 Tb3
xb7
7 1590 126 173036 Th3-g3 Rc4-c5 h3 Rc5-c6 Tg3-c3 Rc6-d6 Tc3-b3 Rd6-d5 Tb3
xb7
8 1623 129 188433 Th3-g3 !!
8 1748 139 234158 Th3-g3 Rc4-c5 h3 Rc5-d5 h2 Tg1-e1 Tg3-d3 Rd5-c4 Td3-b3
Rc4-d4 Tb3xb7
8 1748 142 246258 Th3-g3 Rc4-c5 h3 Rc5-d5 h2 Tg1-e1 Tg3-d3 Rd5-c4 Td3-b3
Rc4-d4 Tb3xb7
9 1715 158 321953 Th3-g3 ?? Rc4-c5 h3 Rc5-d5 h2 Tg1-e1 Tg3-d3 Rd5-c4 Td3-
b3 Rc4-d4 Tb3xb7
9 1515 166 365666 Th3-g3 ?? Rc4-c5 h3 Rc5-d5 h2 Tg1-e1 Tg3-d3 Rd5-c4 Td3-
b3 Rc4-d4 Tb3xb7
9 1516 168 374930 Th3-g3 !!
9 1716 170 384605 Th3-g3 !!
9 1797 223 669372 Th3-g3 Rc4-d5 h3 Tg1-e1 g1=D Te1-e5 Rf5-g6 b8=D Tg3-d3
Rd5-e6 Dg1-g4 Re6-e7 Tb2xb8
9 1797 224 669399 Th3-g3 Rc4-d5 h3 Tg1-e1 g1=D Te1-e5 Rf5-g6 b8=D Tg3-d3
Rd5-e6 Dg1-g4 Re6-e7 Tb2xb8
10 1807 265 895949 Th3-g3 Rc4-d5 h3 Tg1-e1 g1=D Te1-e5 Rf5-f4 b8=D Tg3-d3
Rd5-e6 Dg1-g6 Re6-e7 Tb2xb8
10 1807 282 982311 Th3-g3 Rc4-d5 h3 Tg1-e1 g1=D Te1-e5 Rf5-f4 b8=D Tg3-d3
Rd5-e6 Dg1-g6 Re6-e7 Tb2xb8
11 1774 390 1592779 Th3-g3 ?? Rc4-d5 h3 Tg1-e1 g1=D Te1-e5 Rf5-f4 b8=D Tg3-
d3 Rd5-e6 Dg1-g6 Re6-e7 Tb2xb8
11 1775 397 1627603 Th3-g3 !!
11 1959 501 2243617 Th3-g3 Rc4-d5 h3 b8=D Tb2xb8 Tg1-e1
11 1959 501 2243644 Th3-g3 Rc4-d5 h3 b8=D Tb2xb8 Tg1-e1
12 1926 656 3129660 Th3-g3 ?? Rc4-d5 h3 b8=D Tb2xb8 Tg1-e1
12 1927 667 3185001 Th3-g3 !!
12 2127 1435 7361208 Th3-g3 !!
12 2127 1544 8100241 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-c6 h2 Tg1xg2 Tg3xg2 Rc
6-c7 Tg2-b2 Rc7-c6 h1=D Rc6-c5
12 2127 1545 8100268 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-c6 h2 Tg1xg2 Tg3xg2 Rc
6-c7 Tg2-b2 Rc7-c6 h1=D Rc6-c5
13 2160 2422 12810155 Th3-g3 !!
13 2360 2528 13377840 Th3-g3 !!
13 2137 2621 13927758 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-c6 h2 Tg1xg2 Tg3xg2 Rc
6-d6 Tg2-b2 Rd6-d7 Rf5-e4 Rd7-d6 h1=D
13 2137 2825 15171884 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-c6 h2 Tg1xg2 Tg3xg2 Rc
6-d6 Tg2-b2 Rd6-d7 Rf5-e4 Rd7-d6 h1=D
14 2170 2897 15529898 Th3-g3 !!
14 2370 2970 15944117 Th3-g3 !!
14 2566 5648 31248740 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-d6 h2 Tg1-a1 g1=D Ta1-
a5 Rf5-f6 Ta5-a6 Tb8-b6 Ta6xb6 Dg1xb6 Rd6-d7 Rf6-e5 Rd7-e7 h1=D
14 2566 5846 32460553 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-d6 h2 Tg1-a1 g1=D Ta1-
a5 Rf5-f6 Ta5-a6 Tb8-b6 Ta6xb6 Dg1xb6 Rd6-d7 Rf6-e5 Rd7-e7 h1=D
15 2599 6467 35530409 Th3-g3 !!
15 2799 6906 37820447 Th3-g3 !!
15 9981 14814 80878290 Th3-g3 b8=D Tb2xb8 Rc4-c5 h3 Rc5-d6 h2 Tg1-a1 g1=D Ta1-
a5 Rf5-f6 Ta5-a6 Tb8-b6 Ta6xb6 Dg1xb6 Rd6-d7 Tg3-d3 Rd7-e8 Td3-d8
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