Author: Dann Corbit
Date: 22:39:41 01/15/02
In this post:
http://www.icdchess.com/forums/1/message.shtml?207574
Benny Antonsson proposed this position:
[D]r1bqk1nr/pppp1p1p/2n3p1/1B6/1b1NP3/2P5/PP3PPP/RNBQK2R b KQkq - 0 1
Which has the well known response Bg7 (played almost 100% since the 1800's).
ExChess analysis said this:
ExChess takes 55 seconds, and switches to something novel, Qe7:
Starting search on position:
r1bqkbnr/pppp1p1p/2n3p1/1B6/3NP3/8/PPP2PPP/RNBQK2R b KQkq -
Target search time: 99900
Starting depth: 1
Game stage: 0
1. -0.45 0 88750 1. ... Nf6
2. -0.60 0 88837 1. ... Nf6 2. Nc3
3. -0.66 0 89105 1. ... Nf6 2. Nxc6 dxc6 3. Qxd8+ Kxd8 4. Bd3
3. -0.62 0 89439 1. ... Nxd4 2. Qxd4 Nf6 3. O-O
4. -0.55 0 90147 1. ... Nxd4 2. Qxd4 Nf6 3. Nc3
4. -0.53 0 92019 1. ... Nf6 2. Nxc6 dxc6 3. Qxd8+ Kxd8 4. Bg5 Bb4+
5. c3 cxb5 6. cxb4
5. -0.60 0 94733 1. ... Nf6 2. Nxc6 bxc6 3. Bd3 d5 4. Nc3
6. -0.48 0 120149 1. ... Nf6 2. Nxc6 bxc6 3. Bd3 d5 4. Nc3 Bb4
6. -0.38 0 166730 1. ... Bb4+ 2. c3 Bd6 3. O-O Qh4 4. f4 Nf6
7. -0.49 0 282419 1. ... Bb4+ 2. c3 Bd6 3. Qc2 Nxd4 4. cxd4 Qh4 5. g3
Qd8
7. -0.34 2 722552 1. ... Qh4 2. Qd3 Nf6 3. Nc3 Bc5 4. Be3 O-O
8. --
8. -0.66 3 1298018 1. ... Qh4 2. O-O Nxd4 3. Qxd4 Bd6 4. g3 Qf6 5. Be3
8. -0.63 4 1452288 1. ... Nxd4 2. Qxd4 Nf6 3. Nc3 Be7 4. Nd5 O-O 5.
Nxe7+ Qxe7 6. Bd3
8. ++ 5 1815142 1. ... Nf6
8. -0.53 5 1988130 1. ... Nf6 2. Nxc6 bxc6 3. Bd3 d5 4. Nc3 Bg4 5. Be2
Qd7
9. -0.44 11 3681706 1. ... Nf6 2. Nxc6 bxc6 3. Bd3 d5 4. Nc3 Bg7 5. O-O
O-O 6. Bg5
10. -0.47 25 8482210 1. ... Nf6 2. Nc3 Bb4 3. Bg5 Bxc3+ 4. bxc3 Ne5 5.
O-O a6 6. Ba4 O-O
10. -0.43 43 15062239 1. ... Nge7 2. Nxc6 Nxc6 3. O-O Bg7 4. Nd2 O-O 5.
Nf3 Qe8 6. Re1 d6
10. -0.36 55 19389717 1. ... Bg7 2. Nf3 Nf6 3. Nc3 O-O 4. O-O d6 5. Bg5
Bg4 6. Re1
11. -0.41 74 26236534 1. ... Bg7 2. Nxc6 bxc6 3. Bd3 Ne7 4. O-O O-O 5.
Nc3
12. -0.34 151 53365883 1. ... Bg7 2. Nxc6 bxc6 3. Be2 Ne7 4. O-O O-O 5.
Nd2 d5 6. Re1 Rb8 7. Rb1 Bb7
13. -0.37 283 99583026 1. ... Bg7 2. Nxc6 bxc6 3. Be2 Ne7 4. O-O O-O 5.
Nc3 d5 6. Bg5 Bxc3 7. bxc3 Re8 8. Bd3
13. -0.36 707 244330518 1. ... Qe7 2. Nc3 Bg7 3. Nde2 Nf6 4. Bg5 Qc5 5.
Be3 Qh5 6. Nf4 Qxd1+ 7. Rxd1 Nb4 8. Rd2 O-O
So I analyzed the position after Qe7 and after Bg7 using Yace:
[D]r1b1k1nr/ppppqpbp/2n3p1/1B6/3NP3/8/PPP2PPP/RNBQK2R w KQkq -
[D]r1bqk1nr/pppp1pbp/2n3p1/1B6/3NP3/8/PPP2PPP/RNBQK2R w KQkq -
white ( 1): input: hash 300M
hash size wanted 300000000
Stored 8 learned positions into hash table
entries 24999999 size 299999988 size_wanted 300000000 tts3 8333332
white ( 1): input: post
white ( 1): input: st 300
white ( 1): input: epd \bg7-qe7.epd
r1bqk1nr/pppp1pbp/2n3p1/1B6/3NP3/8/PPP2PPP/RNBQK2R w KQkq -
Stored 8 learned positions into hash table
solution
no solutions
usetime = 299.00, mintime = 299.00 maxtime = 299.00 tl 299.00 ml 0
8 0.000 0.15 1t 1.Bxc6 dxc6 {-10}
21 0.001 0.36 1t 1.Nxc6 dxc6 2.Qxd8+ Kxd8 {0}
79 0.001 0.42 1t 1.Be3 {0}
110 0.002 0.42 1. 1.Be3 {0}
250 0.002 0.17 2t 1.Be3 Nge7 {0}
283 0.003 0.36 2t+ 1.Nxc6 dxc6 2.Qxd8+H Kxd8H {0}
312 0.003 0.36 2t 1.Nxc6 dxc6 2.Qxd8+H Kxd8H {0}
778 0.005 0.36 2. 1.Nxc6 dxc6 2.Qxd8+ Kxd8 {0}
1883 0.008 0.21 3t 1.Nxc6 bxc6 2.Be2 d5 {0}
2257 0.010 0.26 3t+ 1.Be3 Qh4 2.Nxc6 dxc6 {0}
3602 0.015 0.44 3t 1.Be3 a6 2.Nxc6 {340}
4686 0.018 0.44 3. 1.Be3 a6 2.Nxc6 {340}
7705 0.030 0.21 4t 1.Be3 Nge7 2.O-O O-O {0}
15136 0.049 0.21 4. 1.Be3 Nge7 2.O-O O-O {0}
30885 0.106 0.43 5t 1.Be3 Nge7 2.O-O O-O 3.Nc3 {0}
53896 0.157 0.43 5. 1.Be3 Nge7 2.O-O O-O 3.Nc3 {0}
93946 0.282 0.24 6t 1.Be3 a6 2.Bc4 Qf6 3.Nxc6 Qxc6 {0}
105286 0.317 0.25 6t+ 1.Nxc6 dxc6 2.Qxd8+ Kxd8 3.Be2 Bxb2 4.Bxb2 Ne7
{270}
156003 0.455 0.27 6t 1.Nxc6 bxc6 2.Be2 Rb8 3.c3 d5 4.Nd2 {0}
200876 0.564 0.27 6. 1.Nxc6 bxc6 2.Be2 Rb8 3.c3 d5 4.Nd2 {0}
363113 1.083 0.19 7t 1.Nxc6 bxc6 2.Bd3 Ne7 3.O-O O-O 4.Nc3 d5H {0}
505215 1.523 0.20 7t+ 1.Be3 a6 2.Be2 Nxd4 3.Bxd4 Nf6
571153 1.891 0.25 7t 1.Be3 a6 2.Be2 d5 3.exd5 Qxd5 4.Bf3 Qa5+ 5.Nc3
{0}
813042 2.459 0.25 7. 1.Be3 a6 2.Be2 d5 3.exd5 Qxd5 4.Bf3 Qa5+ 5.Nc3
{0}
2151136 6.273 0.32 8t 1.Be3 Qf6 2.Bxc6 bxc6 3.Nc3H Qg5H 4.Bxg5H Bxd4H
{651}
2288864 6.603 0.33 8t+ 1.Nxc6 bxc6 2.Bd3 Ne7 3.O-O O-O 4.Nc3 d5 5.Be3
{0}
2548902 7.278 0.42 8t 1.Nxc6 bxc6 2.Bd3 Ne7 3.O-O O-O 4.Nc3 Rb8 5.Qg4
Bxc3 6.bxc3 {10}
2970013 8.276 0.42 8. 1.Nxc6 bxc6 2.Bd3 Ne7 3.O-O O-O 4.Nc3 Rb8 5.Qg4
Bxc3 6.bxc3 {10}
3887949 10.819 0.26 9t 1.Nxc6 bxc6 2.Be2 Qh4 3.Qd3 Ne7 4.Nc3 O-O 5.O-O
Be5 {0}
6299812 17.054 0.26 9. 1.Nxc6 bxc6 2.Be2 Qh4 3.Qd3 Ne7 4.Nc3 O-O 5.O-O
Be5 {0}
8590292 23.075 0.30 10t 1.Nxc6 bxc6 2.Be2 Qh4 3.Nd2 Ne7 4.g3 Qh3 5.Bf1
Qe6 6.Bc4H {0}
14215011 38.579 0.30 10. 1.Nxc6 bxc6 2.Be2 Qh4 3.Nd2 Ne7 4.g3 Qh3 5.Bf1
Qe6 6.Bc4 {0}
19909410 54.519 0.25 11t 1.Nxc6 bxc6 2.Be2 Ne7 3.O-O O-O 4.Nc3H Bxc3H
5.bxc3H Rb8H 6.Bg5H f6H 7.Be3H d5H {10}
36198436 1:38.5 0.25 11. 1.Nxc6 bxc6 2.Be2 Ne7 3.O-O O-O 4.Nc3 Bxc3
5.bxc3 Rb8 6.Bg5 f6 7.Be3 d5 {10}
58950721 2:44.0 0.29 12t 1.Nxc6 bxc6 2.Be2 Qh4 3.O-O Ne7 4.Qd3H Qxh2+H
5.Kxh2H Be5+H 6.g3H Ba6H {921}
100470548 4:44.1 0.29 12. 1.Nxc6 bxc6 2.Be2 Qh4 3.O-O Ne7 4.Qd3 Qxh2+
5.Kxh2 Be5+ 6.g3 Ba6 {921}
105257186 4:58.9 0.29 12f. 1.Nxc6 bxc6 2.Be2 Qh4 3.O-O Ne7 4.Qd3 Qxh2+
5.Kxh2 Be5+ 6.g3 Ba6 {921}
105257186 Nodes, 33.14% Leavenodes, 352040 Nodes/sec
76179067 eval, 40.59% score, 335514218 genmoves, 17.55% captures le 295/287
ext: pawn 9501, rcp 557838, chk 1389272, repchk 197487, null 2808, prune 7450610
htable: 80322930 store, 0 rejected, 103346753 probe, 30.5% f/p, 39.2% f/s
entries 24999999 age 0 renew 0
egtb probes 0, found 0 max_depth 34
r1b1k1nr/ppppqpbp/2n3p1/1B6/3NP3/8/PPP2PPP/RNBQK2R w KQkq -
Stored 8 learned positions into hash table
solution
no solutions
usetime = 299.00, mintime = 299.00 maxtime = 299.00 tl 299.00 ml 0
12 0.001 0.11 1t 1.Bxc6 dxc6 {-10}
230 0.003 0.11 1. 1.Bxc6 dxc6 {-10}
279 0.003 0.11 2t 1.Bxc6 dxc6 {-10}
488 0.004 0.11 2. 1.Bxc6 dxc6 {-10}
1701 0.009 0.09 3t 1.Bxc6 bxc6 2.Nc3 Ba6 {-10}
3707 0.013 0.09 3. 1.Bxc6 bxc6 2.Nc3 Ba6 {-10}
11875 0.039 0.14 4t 1.Bxc6 dxc6 2.f3 Qb4+ 3.c3 Qc4H {-10}
15461 0.049 0.14 4. 1.Bxc6 dxc6 2.f3 Qb4+ 3.c3 Qc4 {-10}
27793 0.086 -0.08 5t 1.Bxc6 dxc6 2.f3 Qd6 3.c3 Ne7 {-10}
48714 0.135 -0.08 5. 1.Bxc6 dxc6 2.f3 Qd6 3.c3 Ne7 {-10}
134901 0.386 0.21 6t 1.Bxc6 dxc6 2.O-O Nf6 3.Bg5 Qe5 4.Bxf6 {330}
161510 0.446 0.21 6. 1.Bxc6 dxc6 2.O-O Nf6 3.Bg5 Qe5 4.Bxf6 {330}
263940 0.761 0.13 7t 1.Bxc6 dxc6 2.O-O Bd7 3.Nc3 O-O-O 4.Bf4 Kb8
{-10}
412585 1.066 0.13 7. 1.Bxc6 dxc6 2.O-O Bd7 3.Nc3 O-O-O 4.Bf4 Kb8
{-10}
797557 2.081 0.18 8t 1.Bxc6 dxc6 2.O-O Nf6 3.Nc3 c5 4.Nb3 O-O 5.Bg5
{-10}
1110358 2.841 0.18 8. 1.Bxc6 dxc6 2.O-O Nf6 3.Nc3 c5 4.Nb3 O-O 5.Bg5
{-10}
1999130 5.386 -0.01 9t 1.Bxc6 dxc6 2.O-O Nf6 3.Bg5 O-O 4.Nc3 Qc5
5.Bxf6 Bxf6 {-20}
4319081 11.820 -0.01 9. 1.Bxc6 dxc6 2.O-O Nf6 3.Bg5 O-O 4.Nc3 Qc5
5.Bxf6 Bxf6 {-20}
8695091 24.357 -0.10 10t 1.Bxc6 dxc6 2.O-O Bd7 3.Nf3 O-O-O 4.Qe2 Nf6
5.Nc3 Kb8 6.Bf4 {-10}
14048464 39.023 -0.10 10. 1.Bxc6 dxc6 2.O-O Bd7 3.Nf3 O-O-O 4.Qe2 Nf6
5.Nc3 Kb8 6.Bf4 {-10}
22448475 1:04.0 -0.25 11t 1.Bxc6 dxc6 2.O-O Bd7 3.Nc3 O-O-O 4.Be3 c5
5.Nb3 Bxc3 6.bxc3 Qxe4 {-80}
38849992 1:48.3 -0.25 11. 1.Bxc6 dxc6 2.O-O Bd7 3.Nc3 O-O-O 4.Be3 c5
5.Nb3 Bxc3 6.bxc3 Qxe4 {-80}
69386394 3:17.4 -0.16 12t 1.Bxc6 dxc6 2.O-O Bd7 3.Nf3 O-O-O 4.Qe2 Nf6
5.Nc3 Rhe8 6.Bg5 h6 7.Bh4 {-10}
104332826 4:58.9 -0.16 12u. 1.Bxc6 dxc6 2.O-O Bd7 3.Nf3 O-O-O 4.Qe2 Nf6
5.Nc3 Rhe8 6.Bg5 h6 7.Bh4 {-10}
104332826 Nodes, 31.97% Leavenodes, 348951 Nodes/sec
76587351 eval, 38.04% score, 378443434 genmoves, 14.50% captures le 276/318
ext: pawn 2313, rcp 480244, chk 2012822, repchk 369075, null 4601, prune 6543116
htable: 82461187 store, 0 rejected, 102262991 probe, 26.9% f/p, 33.4% f/s
entries 24999999 age 0 renew 0
egtb probes 0, found 0 max_depth 40
0 nodes, 0 leavenodes in 619.52 sec 0 n/s
test nodes 0 win nodes 0 mate nodes 0
win time 0.00 mate time 0.00 av depth 0.000 (nm 0.000) maxdepth 40, tu 915
log(win_nodes) = 0.00000 log(win_time) = 0.00000
white ( 1): input: quit
How about that!
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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