Author: Bernhard Bauer
Date: 00:02:11 11/05/99
Go up one level in this thread
On November 03, 1999 at 19:11:21, Howard Exner wrote:
>On November 03, 1999 at 16:35:22, Dann Corbit wrote:
>
>>On November 03, 1999 at 15:53:29, Howard Exner wrote:
>>
>>>On November 03, 1999 at 13:07:48, Dann Corbit wrote:
>>>
>>>>Here is analysis at fairly long time control. I think most of the suggested
>>>>moves are actually bugs in the epd test suite.
>>>
>>>Just one of them is wrong. That's the one that suggests Rxh2. The rest are fine,
>>>just difficult for computers. Cross reference your analysis with the one I
>>>posted or just enter in the moves from my post and then see if your program
>>>agrees or not. Maybe you'll find something that was missed by the ECM98 project.
>>Is this the correct projection from your analysis?:
>>
>>r4k1r/pp2pp2/3p1b2/q2PnQpp/3N4/1BP3P1/PP3PP1/3RR1K1 w - - bm Rxe5; id
>>"ECM.1291"; c0 "Unknown -- possibly suspect";
>
>1. Rxe5 dxe5 2. d6 Qd8 3. dxe7+ Qxe7 4. Nf3
>This one I'm not as sure as the others. Maybe there is some better defense for
>black?
>
>>2b1rr1k/1p5p/1Ppp2q1/p3bN2/2P1n3/5R2/PBQ3BP/3R2K1 w - - bm Nxd6;id "ECM.1061";
>>pv Nxd6 Rxf3 Nxe8 Bxb2 Qxb2+ Kg8 Rd8 Rf8 Rxc8 Rxe8 Rxe8+ Qxe8 Qe2 Qd8 Bxe4;
>>r4rk1/ppp3b1/3p1qp1/3Pp3/2P1Bn2/4BP2/PP1Q4/2K3RR w - - bm Rxg6; id "ECM.1149";
>>pv Rxg6 Nxg6 Bg5 Qf7 Qh2 Rfe8 Qh7+ Kf8 Bxg6 Qg8 Qh3 Re7 Bxe7+ Kxe7 Qh4+;
>>rq3r1k/p2n1p2/1pbb1np1/2p2BB1/8/2N2N2/PP3QPP/3R1RK1 w - - bm Rxd6; id
>>"ECM.1169"; pv Rxd6 Qxd6 Rd1 Qb8 Bxd7 Nxd7 Qh4+ Kg8 Rxd7 Bxf3 Nd5 Qe5 Nf6+;
>>1r3rk1/6p1/p1pb1qPp/3p4/4nPR1/2N4Q/PPP4P/2K1BR2 b - - bm Rxb2; id "ECM.1229"; pv
>>Rxb2 Kxb2 Ba3+ Kxa3 Rb8;
>>rnb2rk1/pp2bppp/2p5/q7/4NN2/4B1QP/PPP3P1/2KR3R w - - bm Rd5; id "ECM.1259"; pv
>>Rd5 cxd5 Nh5 Bg4 Qxg4 g6 Nhf6+ Bxf6 Nxf6+ Kh8 Qh4;
>>r1b5/p2k1r1p/3P2pP/1ppR4/2P2p2/2P5/P1B4P/4R1K1 w - - bm Bxg6; id "ECM.1545"; pv
>>Bxg6 hxg6 Re7+ Rxe7 dxe7+ Kxe7 Rd8;
>>r4rk1/ppq3pp/2p1Pn2/4p1Q1/8/2N5/PP4PP/2KR1R2 w - - bm Rxf6; id "ECM.1574"; pv
>>Rxf6 Rxf6 Rd7 Rg6 Qe7 Qc8 Qf7+ Kh8 e7 Qg8 Qxg8+ Rxg8 Ne4;
>>r2q3r/2pkb1p1/p2p1n2/4p1p1/Pp2P1P1/1QP5/1P1P2PP/RNB2RK1 b - - bm Rxh2; id
>>"ECM.1621";
>
>The book line showed some faulty lines here for white. I recall that Amir Ban
>showed that Rxh2 leads nowhere and the participants of the ECM98 project
>concurred. There is lengthy analysis of these and many other positions in past
>CCC posts( mostly titled ECM98 Errata).
>
>>2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - - bm Nxh7; id
>>"ECM.1622"; pv Nxh7 Kxh7 Qh4+ Kg8 Bg5 Re8 Re3 Rxc3 Rh3 Kf8 Qh7;
>
>The above positions looks accurate.
Just for comparison I ran those 10 positions with crafty and got:
PFGA: EPD record: 1 ID: ECM.1061
15-> 24:36 2.10 1. Bxe5+ dxe5 2. Nh4 Qh5 3. Qxe4 Rg8
4. Nf5 Rg4 5. Qc2 Bxf5 6. Rxf5 Rxc4
7. Rxh5 Rxc2 8. Be4 Re2 9. Rxh7+ Kg8
10. Bg6 Re6
16 41:39 2.12 1. Bxe5+ dxe5 2. Nh4 Qh5 3. Qxe4 Rg8
4. Nf5 Rg4 5. Qc2 Qg6 6. Rd6 Qf7 7.
c5 Rc4 8. Qf2 Rc1+ 9. Bf1 Qc4 10. Kg2
Qxc5
16-> 62:17 2.12 1. Bxe5+ dxe5 2. Nh4 Qh5 3. Qxe4 Rg8
4. Nf5 Rg4 5. Qc2 Qg6 6. Rd6 Qf7 7.
c5 Rc4 8. Qf2 Rc1+ 9. Bf1 Qc4 10. Kg2
Qxc5
time=90:00 cpu=200% mat=-1 n=2697156624 fh=0% nps=499458
ext-> checks=161338095 recaps=9336412 pawns=1740463 1rep=10915623
thrt:666055
predicted=0 nodes=2697156624 evals=454494969
endgame tablebase-> probes done=0 successful=0
SMP-> split=2103 stop=342 data=9/64 cpu=180:14 elap=90:00
PFGA: EPD record: 2 ID: ECM.1149
15-> 10:52 1.90 1. Rg4 g5 2. Bxf4 exf4 3. Rh5 Qd4 4.
Qxd4 Bxd4 5. Rgxg5+ Kf7 6. Rh7+ Ke8
7. Rxc7 Rb8 8. Rg6 Kd8 9. Rh7 Be3+
10. Kc2 Bc5
16 21:24 1.75 1. Rg4 g5 2. Bxf4 exf4 3. Qg2 Bh6 4.
Rgh4 Bg7 5. Rh5 Qd4 6. Rxg5 Rf7 7.
Kb1 Kf8 8. Qe2 Bf6 9. Rg4
16-> 36:31 1.75 1. Rg4 g5 2. Bxf4 exf4 3. Qg2 Bh6 4.
Rgh4 Bg7 5. Rh5 Qd4 6. Rxg5 Rf7 7.
Kb1 Kf8 8. Qe2 Bf6 9. Rg4
17 70:22 1.88 1. Rg4 g5 2. Bxf4 exf4 3. Rh5 Qd4 4.
Qxd4 Bxd4 5. Rgxg5+ Kf7 6. Rh7+ Ke8
7. Rxc7 Rb8 8. Rg6 Kd8 9. Rh7 Be5 10.
Bf5 b5 11. Rd7+ Ke8
time=90:00 cpu=199% mat=-1 n=2713942123 fh=22% nps=502565
ext-> checks=167874950 recaps=7425378 pawns=1230798 1rep=12970613
thrt:858857
predicted=0 nodes=2713942123 evals=465463975
endgame tablebase-> probes done=0 successful=0
SMP-> split=2020 stop=328 data=9/64 cpu=179:59 elap=90:00
PFGA: EPD record: 3 ID: ECM.1169
(3) 14-> 68:37 3.24 1. Qh4+ Nh5 2. Bxd7 Bxd7 3. Ne4 Bb5
4. g4 f6 5. Bxf6+ Rxf6 6. Nxf6 Bxf1
7. gxh5 g5 8. Qe4 Bxh2+ 9. Nxh2 Bh3
15 75:56 ++ 1. Qh4+!!
time=90:00 cpu=199% mat=-1 n=2940854110 fh=11% nps=544589
ext-> checks=217091210 recaps=5256833 pawns=95536 1rep=15509470
thrt:771142
predicted=0 nodes=2940854110 evals=233818681
endgame tablebase-> probes done=0 successful=0
SMP-> split=3402 stop=407 data=11/64 cpu=179:58 elap=90:00
PFGA: EPD record: 4 ID: ECM.1229
(3) 13-> 31:43 -0.53 1. ... Be5 2. f5 Rb6 3. Qd3 Bxh2 4.
Na4 Rbb8 5. Bh4 Qe5 6. Qxa6 Rxf5 7.
Rxf5 Qxf5 8. Qe2
(2) 14 37:29 -0.43 1. ... Be5 2. f5 Rb6 3. Qd3 Bxh2 4.
Kb1 Rfb8 5. b3 Nc5 6. Qh3 Be5 7. Bh4
Qf8 8. Qe3 Bxc3 9. Qxc3
14 65:48 -0.17 1. ... Rxb2 2. Kxb2 Ba3+ 3. Kxa3 Rb8
4. Nb5 Rxb5 5. Bb4 a5 6. c3 Nxc3 7.
Qxc3 axb4+ 8. Qxb4 Rxb4 9. Kxb4
(2) 14-> 71:50 -0.17 1. ... Rxb2 2. Kxb2 Ba3+ 3. Kxa3 Rb8
4. Nb5 Rxb5 5. Bb4 a5 6. c3 Nxc3 7.
Qxc3 axb4+ 8. Qxb4 Rxb4 9. Kxb4
time=90:00 cpu=199% mat=-1 n=2607920258 fh=4% nps=482899
ext-> checks=163042786 recaps=7179847 pawns=3210991 1rep=16227409
thrt:1590024
predicted=0 nodes=2607920258 evals=421826891
endgame tablebase-> probes done=0 successful=0
SMP-> split=1208 stop=299 data=8/64 cpu=180:00 elap=90:00
PFGA: EPD record: 5 ID: ECM.1259
(4) 13-> 21:09 2.27 1. Nd5 cxd5 2. Bh6 Bg4 3. Qxg4 g6 4.
Bxf8 Bxf8 5. Nc3 Na6 6. Rxd5 Nc5 7.
Kb1 Rd8 8. Rf1
(3) 14 30:18 2.44 1. Nd5 cxd5 2. Bh6 Bg4 3. Qxg4 g6 4.
Bxf8 Bxf8 5. Nf6+ Kg7 6. Qc8 Qxa2 7.
Qxb7 Bb4 8. Ne8+ Kf8 9. Qxb4+ Kxe8
10. Qb5+ Kf8 11. Qxd5
time=90:00 cpu=199% mat=-1 n=2721910306 fh=6% nps=504031
ext-> checks=183256791 recaps=4588671 pawns=65789 1rep=17764086
thrt:1704873
predicted=0 nodes=2721910306 evals=347834008
endgame tablebase-> probes done=0 successful=0
SMP-> split=1658 stop=338 data=9/64 cpu=179:59 elap=90:00
PFGA: EPD record: 6 ID: ECM.1291
(3) 13-> 14:54 0.86 1. f4 gxf4 2. gxf4 Ng4 3. Qd7 Rb8 4.
Rd2 Qd8 5. Qf5 Rh6 6. Bc2 Kg8 7. Rde2
Qc7
(2) 14 17:17 0.72 1. f4 gxf4 2. gxf4 Ng4 3. Qd7 Rb8 4.
Rd2 Qc5 5. Kh1 Rg8 6. Qf5 h4 7. Bd1
Bxd4 8. Bxg4
14 51:33 0.73 1. Nf3 Nxf3+ 2. Qxf3 h4 3. g4 Kg7 4.
Re4 Rhc8 5. Rde1 Qc7 6. Qf5 Rd8 7.
Bc4 Qd7 8. Qf3 Kg8
(4) 14-> 54:59 0.73 1. Nf3 Nxf3+ 2. Qxf3 h4 3. g4 Kg7 4.
Re4 Rhc8 5. Rde1 Qc7 6. Qf5 Rd8 7.
Bc4 Qd7 8. Qf3 Kg8
(3) 15 65:17 0.76 1. Nf3 Nxf3+ 2. Qxf3 h4 3. g4 Kg7 4.
Re3 Qc5 5. Rde1 Rhe8 6. Qe4 Rac8 <HT>
time=90:00 cpu=199% mat=0 n=2470142217 fh=28% nps=457396
ext-> checks=80734883 recaps=7325976 pawns=2152792 1rep=6165731
thrt:525712
predicted=0 nodes=2470142217 evals=590841838
endgame tablebase-> probes done=0 successful=0
SMP-> split=1639 stop=373 data=10/64 cpu=179:59 elap=90:00
PFGA: EPD record: 7 ID: ECM.1545
(4) 14-> 4:47 2.30 1. cxb5 Bb7 2. Rdd1 f3 3. Kf2 Re8 4.
Rxe8 Kxe8 5. Bb3 Rf4 6. Re1+ Re4 7.
Rxe4+ Bxe4 8. Be6 g5 9. h3
15 7:01 ++ 1. cxb5!!
time=90:00 cpu=199% mat=0 n=3102501316 fh=0% nps=574484
ext-> checks=440321796 recaps=1541757 pawns=14773230 1rep=53733160
thrt:128571
predicted=0 nodes=3102501316 evals=50781900
endgame tablebase-> probes done=0 successful=0
SMP-> split=2346 stop=279 data=13/64 cpu=179:59 elap=90:00
PFGA: EPD record: 8 ID: ECM.1574
(2) 13-> 6:37 0.58 1. Rfe1 Rae8 2. Qxe5 Qxe5 3. Rxe5 Ng4
4. Rg5 Nxh2 5. Rd7 g6 6. Rxb7 Rxe6
7. Rxa7 Rf2
14 30:38 0.41 1. Rfe1 Nd5 2. Qxe5 Qxe5 3. Rxe5 Nxc3
4. bxc3 Rf2 5. Rd2 Rxd2 6. Kxd2 Kf8
7. Ke3 Ke7 8. h4 Rd8 9. a4
14-> 41:24 0.41 1. Rfe1 Nd5 2. Qxe5 Qxe5 3. Rxe5 Nxc3
4. bxc3 Rf2 5. Rd2 Rxd2 6. Kxd2 Kf8
7. Ke3 Ke7 8. h4 Rd8 9. a4
time=90:00 cpu=199% mat=-1 n=2626312791 fh=1% nps=486329
ext-> checks=154503691 recaps=10343152 pawns=13532858
1rep=15148744 thrt:823524
predicted=0 nodes=2626312791 evals=521608900
endgame tablebase-> probes done=0 successful=0
SMP-> split=1299 stop=253 data=10/64 cpu=180:00 elap=90:00
PFGA: EPD record: 9 ID: ECM.1621
13-> 16:23 -0.42 1. ... Qb8 2. Qxb4 Qa7+ 3. d4 d5 4.
Qa5 exd4 5. Kh1 Rxh2+ 6. Kxh2 Rh8+
7. Kg3 Nxe4+ 8. Kf3 Rf8+ 9. Ke2 Ng3+
10. Kd3 Rxf1 11. Qxd5+ Kc8 12. Bxg5
Bxg5 13. Qxg5
14 27:27 -0.42 1. ... Qb8 2. Qxb4 Qa7+ 3. d4 d5 4.
Qa5 exd4 5. Kh1 Rxh2+ 6. Kxh2 Rh8+
7. Kg3 Nxe4+ 8. Kf3 Rf8+ 9. Ke2 Ng3+
10. Kd3 Rxf1 11. Qxd5+ Kc8 12. Bxg5
Bxg5 13. Qxg5
14-> 34:06 -0.42 1. ... Qb8 2. Qxb4 Qa7+ 3. d4 d5 4.
Qa5 exd4 5. Kh1 Rxh2+ 6. Kxh2 Rh8+
7. Kg3 Nxe4+ 8. Kf3 Rf8+ 9. Ke2 Ng3+
10. Kd3 Rxf1 11. Qxd5+ Kc8 12. Bxg5
Bxg5 13. Qxg5
time=90:00 cpu=199% mat=-1 n=2331090612 fh=5% nps=431672
ext-> checks=112054105 recaps=7549654 pawns=2921497 1rep=9970016
thrt:530107
predicted=0 nodes=2331090612 evals=501714256
endgame tablebase-> probes done=0 successful=0
SMP-> split=1326 stop=269 data=11/64 cpu=179:59 elap=90:00
PFGA: EPD record: 10 ID: ECM.1622
16-> 35:49 0.03 1. Bd2 h6 2. Nf3 Kh8 3. Rab1 Bc6 4.
Qh4 Ng8 5. Bg5 Qd7 6. Nd2 Rfe8 7. c4
dxc4 8. Nxc4 Qd5 9. Re4
17 57:58 0.04 1. Bd2 h6 2. Nf3 Kh8 3. Rab1 Bc6 4.
Qh4 Ng8 5. Bg5 Qd7 6. Rec1 a5 7. a3
Rfe8 8. c4 a4 9. c5
17-> 75:47 0.04 1. Bd2 h6 2. Nf3 Kh8 3. Rab1 Bc6 4.
Qh4 Ng8 5. Bg5 Qd7 6. Rec1 a5 7. a3
Rfe8 8. c4 a4 9. c5
time=90:00 cpu=199% mat=0 n=2376340288 fh=1% nps=440031
ext-> checks=40104105 recaps=6609723 pawns=761413 1rep=5049530
thrt:450011
predicted=0 nodes=2376340288 evals=578452868
endgame tablebase-> probes done=0 successful=0
SMP-> split=1122 stop=210 data=7/64 cpu=179:59 elap=90:00
Kind regards
Bernhard
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