It's time for this position again

[Robert Flesher]

Hello John, let's take a look. Engines using a Core I7 :



New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1

Analysis by Rybka 3 Dynamic :

1...Ne7
² (0.47) Depth: 2 00:00:01
1...Ne7
² (0.62) Depth: 3 00:00:01
1...Ne7
² (0.58) Depth: 4 00:00:01
1...Ne7 2.Qf3
² (0.63) Depth: 5 00:00:01
1...Ne7 2.Qd3 Nxd5 3.cxd5 Rg7
² (0.58) Depth: 6 00:00:01 7kN
1...Ne7 2.Qd3 Ng8 3.Qf3
² (0.55) Depth: 7 00:00:01 12kN
1...Ne7 2.Qd3 Ng8 3.Qf3 Nf6
² (0.55) Depth: 8 00:00:01 15kN
1...Ne7 2.Qd3 Rg7 3.Qf3 R7g5 4.Rc2
² (0.56) Depth: 9 00:00:01 51kN
1...Nf8 2.Qf3 Nd7 3.Rdd2 Rg7 4.h3 Rg3
² (0.41) Depth: 9 00:00:01 114kN
1...Nf8 2.Qf3 Nd7 3.h3 Rg3 4.Qxf4 Qxf4 5.Rxf4 Ne5 6.Rd2 Kh5
² (0.39) Depth: 10 00:00:01 146kN
1...Nf8 2.Qf3 Ng6 3.Rfd2 Qf6 4.Qh3 Ne5
² (0.49) Depth: 11 00:00:02 202kN
1...h3 2.Qxh3+ Rh4
² (0.29) Depth: 11 00:00:02 312kN
1...Rh5
= (0.19) Depth: 11 00:00:02 367kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 11 00:00:03 444kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 12 00:00:03 544kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 13 00:00:03 682kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 14 00:00:05 988kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 15 00:00:06 1373kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 16 00:00:10 2187kN
1...Rg3
= (-0.20) Depth: 16 00:00:14 3260kN
1...Rg3
³ (-0.40) Depth: 16 00:00:20 4890kN
1...Rg3
µ (-0.80) Depth: 16 00:00:29 7020kN
1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5 5.e5 Nxe5 6.Kf1 Qh1+ 7.Ke2 Qxg2+ 8.Ke1 Nxf3+ 9.Qxf3 Qh2 10.Rd2 Qh4 11.Kf1 Rg5 12.Qh1 Qxh1+ 13.Bxh1 Re5 14.Bf3 Re3 15.Kg2 Ra3 16.Re2
³ (-0.30) Depth: 16 00:00:57 13837kN
1...Rg3
³ (-0.50) Depth: 17 00:01:47 25937kN

(, Microsoft 02.02.2010)

New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1

Analysis by Naum 4.1:

1...Ne7 2.Bb7
² (0.70) Depth: 2/2 00:00:00
1...Ne7 2.Qd3 Nxd5
² (0.66) Depth: 4/4 00:00:00
1...Ne7 2.Qd3 Nxd5
² (0.66) Depth: 4/4 00:00:00
1...Ne7 2.Qf3 Nxd5 3.exd5
² (0.55) Depth: 5/5 00:00:00
1...Ne7 2.Bb7 Rg8 3.Qd3 Kg6
² (0.57) Depth: 5/14 00:00:00
1...Ne7 2.Bb7 Rg8 3.Qd3 Qc5 4.Rdf1
² (0.47) Depth: 7/7 00:00:00 6kN
1...Ne7 2.Qf3 Nxd5 3.cxd5 Rg8 4.Rc1 R8g7
² (0.59) Depth: 7/17 00:00:00 16kN
1...Ne7 2.Qf3 Rg7 3.h3 Rg3 4.Qxf4+ Qxf4 5.Rxf4
± (0.72) Depth: 8/22 00:00:00 27kN
1...Ne7 2.Qf3 Rg6 3.Re2 Kg7 4.Qd3 Rf6 5.Qh3 Rfg6
± (0.74) Depth: 9/21 00:00:00 49kN
1...Qf6
± (0.73) Depth: 9/21 00:00:00 67kN
1...Qf6 2.Qf3 Ne5 3.Qh3 Qe7 4.Qc3 Qg7 5.Qc2 Qf6
² (0.57) Depth: 9/21 00:00:00 93kN
1...Qf6 2.Bb7 Qe6 3.Rg1 Ne5 4.Bd5 Qf6 5.Rb1 Qg6 6.Qc2
² (0.50) Depth: 10/22 00:00:00 188kN
1...Qf6 2.Qh3 Ne5 3.Rdf1 f3 4.gxf3 Rf4 5.Qe6 Qxe6 6.Bxe6 Kg6
² (0.36) Depth: 11/27 00:00:00 657kN
1...Qf6 2.Qa3 Ne5 3.Rdf1 f3 4.gxf3 Rf4 5.Qc3 h3 6.Qe3 Kg7 7.Qd4
² (0.32) Depth: 13/13 00:00:00 1531kN
1...Qf6 2.Rdf1 Qd4 3.Qh3 Ne5 4.Be6 Qxe4 5.Bxg4 Rxg4 6.Qc3 Qe3 7.Qc2 f3
² (0.42) Depth: 13/34 00:00:00 2627kN
1...Qf6 2.Rdf1 Rg3 3.e5 Rxb3 4.exf6 Rf5 5.f7 Kg7 6.Kg1 f3 7.Rxf3 Rbxf3 8.Rxf3
² (0.28) Depth: 14/32 00:00:01 3846kN
1...Qf6 2.c5 bxc5 3.Be6 Ne5 4.Bxg4 Nxg4 5.Rf3 c4 6.Qa3 h3 7.g3 Rxb5 8.Rxf4 Qe6
= (0.24) Depth: 15/37 00:00:02 9483kN
1...Rh5
= (0.23) Depth: 16/43 00:00:05 18907kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 16/44 00:00:07 27447kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 17/41 00:00:08 31369kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 18/50 00:00:11 41786kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 19/45 00:00:14 55885kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 20/50 00:00:20 82950kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 21/54 00:00:30 131482kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 22/54 00:00:53 236599kN
1...Rh5 2.Rf3 Rhg5 3.Rf2
= (0.00) Depth: 23/57 00:01:41 450538kN

(, Microsoft 02.02.2010)


New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1

Analysis by Stockfish 1.6s:

1...Kg7
+- (1.49) Depth: 1 00:00:00
1...Ne7 2.h3
± (1.25) Depth: 2 00:00:00
1...Ne7 2.Bb7 f3 3.Qxf3
± (1.05) Depth: 3 00:00:00
1...Ne7 2.Bb7 Qc5 3.Qb2 Rg8
± (1.13) Depth: 6 00:00:00
1...Ne7 2.Bb7 Qc5 3.Qb2 Rg8
± (1.13) Depth: 6 00:00:00
1...Ne7 2.Bb7 Qc5 3.Qb2 Qe5
± (0.84) Depth: 6 00:00:00 4kN
1...Ne7 2.Bb7 Qc5 3.Qb2 Qe5 4.Qa3 f3 5.Qxf3
± (1.05) Depth: 7 00:00:00 8kN
1...Ne7 2.Bb7 Qc5 3.Qb2 Qe5 4.Qa3 Qc5 5.Qxc5 Rxc5 6.h3 Rg8 7.Rxf4 Rxc4 8.Rxh4+ Kg5
± (0.76) Depth: 8 00:00:00 43kN
1...Ne7 2.Qf3 Nxd5 3.Rxd5 Qf6 4.Rdd2 Qe5 5.h3 Rg3 6.Qxf4
± (0.84) Depth: 9 00:00:00 117kN
1...Ne7 2.Qd3 Nxd5 3.cxd5 Rg7 4.Rc1 Qg5 5.Qf3 Qe5 6.h3 Rg3 7.Qxf4+ Qxf4 8.Rxf4 Rxg2 9.Rxh4+ Kg5 10.Kxg2 Kxh4+ 11.Kh2
± (0.80) Depth: 10 00:00:00 207kN
1...Ne7 2.Qd3 Nxd5 3.cxd5 Rg7 4.Rc1 Qg5 5.Qf3 Qe5 6.h3 Rg3 7.Qxf4+ Qxf4 8.Rxf4 Rxg2 9.Rxh4+ Kg5 10.Kxg2 Kxh4+ 11.Kh2
± (0.80) Depth: 11 00:00:00 257kN
1...Ne7 2.Qf3 Nxd5 3.exd5 Qe3 4.Re2 Qxf3 5.gxf3
± (1.01) Depth: 12 00:00:00 531kN
1...Qe7 2.Rdf1 Qe5 3.Rd2 Qf6 4.e5 Nxe5 5.Bf3 h3 6.Bxg4 hxg2+ 7.Rxg2 Rxg4 8.Rxg4 Nxg4
² (0.64) Depth: 12 00:00:01 2987kN
1...Qe7 2.Rdf1 Qe5 3.Rd2 Qf6 4.e5 Nxe5 5.Bf3 h3 6.Bxg4 hxg2+ 7.Rxg2 Rxg4 8.Rxg4 Nxg4 9.Qf3
± (0.96) Depth: 13 00:00:01 3342kN
1...Kg7 2.Qd3 Qf6 3.Qf1 Qe7 4.Rb1 h3 5.g3 Rxd5 6.exd5 fxg3 7.hxg3 Qe4+ 8.Kh2 Ne5 9.Rf4
² (0.64) Depth: 13 00:00:01 6026kN
1...Kg7 2.Qd3 Qf6 3.Qf1 Qe7 4.Rdd2 h3 5.gxh3 Rh4 6.Rg2 Rxg2 7.Rxg2 Kh6 8.Qf2 Qf6 9.Qf3 Ne5
² (0.56) Depth: 14 00:00:02 7154kN
1...Rh5 2.Qh3 Rg3 3.Qd7 h3 4.hxg3 fxg3 5.Rfd2 hxg2+ 6.Kxg2 Nh4+ 7.Kg1 Nf3+ 8.Kf1 Nxd2+ 9.Rxd2 Qf6+ 10.Kg1 Qa1+
² (0.44) Depth: 14 00:00:02 9575kN
1...Rh5 2.Qf3 Rg3 3.Qe2 Re3 4.Qd2 h3 5.g3 Rxe4 6.Bxe4 Qxe4+ 7.Kg1 Rg5 8.Qd4 Qxd4 9.Rxd4 fxg3 10.Rf7 Ne5 11.Rxc7
² (0.32) Depth: 15 00:00:03 11561kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 16 00:00:03 14749kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 17 00:00:04 18008kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 18 00:00:05 24684kN
1...Rh5 2.Qf3 Rg3 3.Qe2 Re3 4.Qd2 h3 5.g3 Rxe4 6.Bxe4 Qxe4+ 7.Kg1 Rg5 8.Re1 Qxc4 9.Rc1
= (0.20) Depth: 19 00:00:06 30810kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 20 00:00:14 71264kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 21 00:00:18 93137kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 22 00:00:29 155152kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 23 00:00:45 239794kN
1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5
= (0.00) Depth: 24 00:01:03 340058kN

(, Microsoft 02.02.2010)



New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1

Analysis by Junior 2010 UCI:

1...Ne7 2.Qf3 Nxd5 3.Rxd5
² (0.70) Depth: 3 00:00:00
1...Ne7 2.Qf3 Nxd5 3.Rxd5
² (0.70) Depth: 3 00:00:00
1...Ne7 2.Qf3 Nxd5 3.Rxd5
² (0.70) Depth: 3 00:00:00
1...Ne7 2.Bb7 Qc5 3.Qb2 Qe3
² (0.61) Depth: 6 00:00:00 7kN
1...Qf6 2.Rdf1 Ne5 3.Qc3 Qg7
² (0.57) Depth: 6 00:00:00 18kN
1...Qf6 2.Rdf1 Kh7 3.Qb2 Qxb2 4.Rxb2 Ne5 5.h3 Nd3 6.hxg4 Nxb2
² (0.56) Depth: 9 00:00:00 112kN
1...Qf6 2.Rdf1 Rg3 3.Qc2 Ra3 4.Qd1 Qc3 5.Rc2 Qe5 6.Qc1 Re3 7.Rcf2
² (0.68) Depth: 12 00:00:00 824kN
1...Qf6 2.Rdf1 Rg3 3.Qc2 Ra3 4.Qb1 Re3
² (0.68) Depth: 15 00:00:02 6980kN
1...Qf6 2.Rdf1 Rg3 3.Qc2 Re3 4.Qc1 Qd4 5.h3 Reg3
² (0.46) Depth: 17 00:00:18 50866kN
1...Qf6 2.Rdf1 Rg3 3.Qd1 Re3 4.Qd2 Qc3
² (0.40) Depth: 18 00:00:35 95526kN
1...Qf6 2.c5 Rg3 3.hxg3 hxg3 4.Ra2 Rh5+ 5.Kg1 Qh4 6.Kf1 Qh1+ 7.Ke2 Qxg2+ 8.Kd3 Ne5+ 9.Kc3 Qf3+ 10.Kc2 Qxb3+
² (0.44) Depth: 19 00:01:06 176900kN
1...Qf6 2.c5 Rg3 3.hxg3 hxg3 4.Ra2 Rh5+ 5.Kg1 Qh4 6.Kf1 Qh1+ 7.Ke2 Qxg2+ 8.Kd3 Ne5+ 9.Kc3 Qf3+ 10.Kc2 Qxb3+
² (0.34) Depth: 20 00:02:05 330505kN
1...Qf6 2.c5 Rg3 3.hxg3 hxg3 4.Ra2 Rh5+ 5.Kg1 Qh4 6.Kf1 Qh1+ 7.Ke2 Qxg2+ 8.Kd3 Ne5+ 9.Kc3 Qf3+ 10.Kc2 Qxb3+
² (0.36) Depth: 21 00:03:23 522467kN

(, Microsoft 02.02.2010)


New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1

Analysis by Deep Shredder 12 x64:

1...Qf6 2.Rfd2
² (0.53) Depth: 1/4 00:00:00
1...Qf6 2.Rdf1 Ne5
² (0.52) Depth: 1/4 00:00:00
1...Qf6 2.Rdf1 Ne5
² (0.52) Depth: 1/4 00:00:00
1...Qf6 2.Rdf1 Ne5 3.Qc3
² (0.42) Depth: 3/8 00:00:00
1...Qf6 2.Rdf1 Ne5 3.Qc3
² (0.42) Depth: 4/10 00:00:00
1...Qf6 2.Rdf1 Ne5 3.Qc3
² (0.42) Depth: 4/10 00:00:00
1...Qf6 2.Bb7 Ne7 3.Rdf1 Kh7 4.Bd5
² (0.51) Depth: 5/14 00:00:00
1...Rg3
³ (-0.46) Depth: 5/14 00:00:00
1...Rg3
³ (-0.46) Depth: 6/14 00:00:00 20kN
1...Rg3
³ (-0.46) Depth: 7/16 00:00:00 26kN
1...Rg3
³ (-0.46) Depth: 8/20 00:00:00 34kN
1...Rg3
³ (-0.46) Depth: 9/17 00:00:00 41kN
1...Rg3
³ (-0.46) Depth: 10/17 00:00:00 51kN
1...Rg3
³ (-0.46) Depth: 11/20 00:00:00 71kN
1...Rg3
³ (-0.46) Depth: 12/30 00:00:00 105kN
1...Rg3
³ (-0.46) Depth: 13/26 00:00:00 153kN
1...Rg3
³ (-0.46) Depth: 14/30 00:00:00 272kN
1...Rg3
³ (-0.46) Depth: 15/41 00:00:00 519kN
1...Rg3
³ (-0.46) Depth: 16/36 00:00:00 1030kN
1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5 5.e5 Rg5 6.Qc3 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2+ 9.Kd3 Nxe5+ 10.Kd4 Rg4 11.Be4 Qh2 12.Rff1 g2
³ (-0.46) Depth: 17/47 00:00:03 8378kN
1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5 5.e5 Rg5 6.Qc3 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2+ 9.Kd3 Nxe5+ 10.Kd4 Nxf3+ 11.Qxf3 Qb2+ 12.Kd3 Qb3+ 13.Kd2 Qxf3 14.Bxf3 Kg6 15.Kc3
³ (-0.41) Depth: 18/52 00:00:20 48867kN
1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5 5.e5 Rg5 6.Qc3 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2+ 9.Kd3 Nxe5+ 10.Kd4 Nxf3+ 11.Qxf3 Qb2+ 12.Kd3 Qb3+ 13.Kd2 Qxf3 14.Bxf3 Kg6 15.Kc3
³ (-0.45) Depth: 19/55 00:00:49 115087kN
1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5 5.e5 Nxe5 6.Kf1 Qh1+ 7.Ke2 Qxg2+ 8.Ke1 Nxf3+ 9.Qxf3 Qh2 10.Rd2
³ (-0.39) Depth: 20/57 00:01:57 284511kN

(, Microsoft 02.02.2010)

[Robert Flesher]

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "Junior 2010 UCI"]
[Result "*"]
[SetUp "1"]
[FEN "8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1"]
[PlyCount "88"]

{512MB, ChimeraPro C.ctg} 1... Qf6 2. c5 Rg3 3. hxg3 hxg3 4. Ra2 Rh5+ 5. Kg1
Qh4 6. Kf1 Qh1+ 7. Ke2 Qxg2+ 8. Kd3 Ne5+ 9. Kc3 Qf3+ 10. Kb2 Rh2+ 11. Kc1 Qxb3
12. Bxb3 g2 13. cxd6 cxd6 14. Rxg2 Rxg2 15. Rxd6+ Kh5 16. Bd1+ Kh4 17. Rd8 Kh3
18. Rd6 Rg7 19. Re6 Nd7 20. e5 Kg2 21. Re8 f3 22. Kd2 Nc5 23. e6 f2 24. Be2
Ne4+ 25. Kc2 Ng3 26. Bd3 Rc7+ 27. Kd2 Rc5 28. Rf8 Re5 29. Bc4 Ne4+ 30. Kd1 Nc5
{Looks like black wins here. This is only one variation and it is not forced.
But maybe this is what Larry had in mind ?} 31. Rg8+ Kf3 32. Rg7 Nxe6 33. Rxa7
Re4 34. Rf7+ Nf4 35. Be2+ Kg3 36. Rg7+ Kh4 37. Rf7 Kg5 38. a7 Rxe2 39. Rxf4
Re1+ 40. Kd2 Kxf4 41. a8=Q f1=Q 42. Qf8+ Ke5 43. Qe8+ Kd4 44. Qxe1 Qxe1+ 45.
Kxe1 0-1

[vb4]

I've dug this one up a few times since it was played a little over seven years ago, and I don't think any engine definitively answered the question one way or another.

This is a position from round 3 of Chessmaster vs. GM Larry Christiansen:

[d]8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 53

At this point, Larry played 53...Rg3?! Afterwards, he claimed it was winning. But unfortunately he blundered later on in the game and lost.

But now that we have all these new incredibly strong engines (no comment about their origins necessary), I would very much appreciate it if any of you with top-end hardware could run this position and see if any engine can find a win for black AFTER playing Rg3. Bonus if an engine actually DOES play Rg3!

Here's the game, for your amusement:

[Event "ICC 2 120 u"]
[Site "Internet Chess Club"]
[Date "2002.09.29"]
[Round "3"]
[White "CM9000 (Botvinnik)"]
[Black "LarryC"]
[TimeControl "120+120"]
[Result "1-0"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.d4 exd4 5.Nxd4 Bb4 6.Bg5 h6 7.Bh4 Bxc3+
8.bxc3 Ne5 9.e3 d6 10.Be2 Ng6 11.Bxf6 Qxf6 12.O-O O-O 13.Qc2 Re8 14.Rfd1
Nf8 15.Bd3 Ne6 16.Nb3 Rb8 17.a4 Qe7 18.a5 Bd7 19.a6 b6 20.Nd4 Nc5 21.Nb5
Bxb5 22.cxb5 Qf6 23.Bc4 Re5 24.Bd5 Rbe8 25.Rd4 Ne6 26.Rd2 g6 27.Ra4 Kg7
28.Rd1 Re7 29.Rb4 g5 30.Bc6 Qg6 31.Qb2 f5 32.Qb1 Qf6 33.Bd5 f4 34.e4 Nf8
35.f3 h5 36.Qc2 Ng6 37.Qa2 Kh6 38.Qd2 Rg7 39.Qd4 g4 40.fxg4 Nh4 41.Rb2
Rxg4 42.Kh1 Ng6 43.Rf2 Qe7 44.Qd2 Reg5 45.Ra1 h4 46.c4 Qe5 47.Rc1 Kg7
48.Bc6 Qe7 49.Rcf1 Re5 50.Qc3 Kh6 51.Bd5 Reg5 52.Qb3 Qe5 53.Rd1 Rg3
54.hxg3 hxg3 55.Ra2 Rg4 56.Kg1 Qh5 57.Kf1 f3 58.Ke1 f2+ 59.Kd2 Rh4
60.Qe3+ Kg7 61.Rf1 Qe5 62.Kc2 Rh2 63.Qf3 Qf4 64.e5 Qxf3 65.Bxf3 Nxe5
66.Bd5 Rh5 67.Ra3 Rg5 68.Kd2 Ng6 69.Re3 Ne5 70.Ke2 Kf6 71.Rh1 Ng6 72.Rh7
1-0

Many thanks in advance,
jm

Hi John,

I ran this position for 72 hours using Rybka and here are the results.

Analysis from E:\Chess Things\Arena\Arena\epd.epd
1/31/2010 10:49:47 PM Level: 259200 Seconds
Analyzing engine: Rybka v2.2n2.mp.w32

1)
Avoid move:
Best move (Rybka v2.2n2.mp.w32): Rg5-h5
Not found in: 72:00:00
2 00:00 1.753 1.795.072 -0.43 Ng6e7
3 00:00 3.084 3.158.016 -0.45 Ng6e7
4 00:00 5.468 329.366 -0.36 Ng6e7
5 00:00 7.305 440.018 -0.40 Ng6e7 Qb3f3
6 00:00 16.694 356.138 -0.54 Ng6e7 Qb3f3 Rg5g7
6 00:00 44.638 411.795 -0.41 Ng6f8 Rf2d2 Nf8e6
7 00:00 64.808 383.603 -0.37 Ng6f8 Qb3f3 Nf8d7 Rd1d2
8 00:00 85.672 371.729 -0.46 Ng6f8 Qb3f3 Nf8d7 Rd1f1 Nd7c5
8 00:00 148.028 358.346 -0.39 Kh6g7 Qb3h3 Qe5f6 Bd5b7 f4f3
9 00:00 193.019 370.828 -0.39 Kh6g7 Qb3h3 Qe5f6 Bd5b7 f4f3 g2xf3
9 00:01 317.506 346.247 0.00 Rg5h5 Qb3h3 Rg4g3 Qh3c8 Rg3d3 Rd1f1 h4h3 Qc8xc7
10 00:01 347.632 344.603 -0.02 Rg5h5 Rd1d3 h4h3 g2xh3 Rg4g5 Qb3c3 Rh5h4
11 00:01 388.408 343.462 0.00 Rg5h5 Qb3h3 Rg4g3 Qh3c8 Rg3d3 Rd1f1 h4h3 Qc8xc7 h3xg2+ Rf2xg2 Ng6h4
12 00:01 452.462 352.603 0.00 Rg5h5 Qb3h3 Rg4g3 Qh3c8 Rg3d3 Rd1f1 h4h3 Qc8xc7 h3xg2+ Rf2xg2 Ng6h4
13 00:01 624.834 358.850 0.00 Rg5h5 Qb3h3 Rg4g3 Qh3c8 Rg3d3 Rd1f1 h4h3 Qc8xc7 h3xg2+ Rf2xg2 Ng6h4 Rg2g4
14 00:09 2.887.394 323.985 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
15 00:14 4.428.084 318.871 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
16 00:17 5.401.673 316.328 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
17 00:25 7.645.248 307.745 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
18 00:35 10.664.324 308.003 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
19 01:17 23.121.237 306.233 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
20 01:55 34.019.721 300.752 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
21 02:56 51.820.977 301.100 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
22 05:03 88.883.166 299.641 0.00 Rg5h5 Rf2f3 Rh5g5 Rf3f2
23 18:17 374.129.283 348.958 +0.06 Rg5h5 Rf2f3 Qe5f6 Rd1f1 Rh5g5 Rf3f2 Rg4g3 Qb3d1 Rg3a3 Qd1c1 Ra3c3 Qc1d1 Rc3a3 Qd1c1
24 30:53 600.202.459 331.567 +0.05 Rg5h5 Rf2f3 Qe5f6 Rd1f1 Rh5g5 Rf3f2 Rg4g3 Qb3d1 Rg3a3 Qd1c1 Ra3c3 Qc1d1 Rc3a3 Qd1c1
25 1:23:34 1.742.593.245 355.867 +0.12 Rg5h5 Rf2f3 Qe5f6 Rd1f1 Rh5g5 Rf3f2 Rg4g3 Qb3d1 Rg3a3 Qd1c1 Ra3c3 Qc1d2 Qf6e5 h2h3
26 3:03:13 3.812.252,712 355.107 +0.12 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3 Kh6g5 Kh1g1 Rh5h8 Bh3f5
27 4:02:21 4.976.006,196 350.418 +0.09 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3 Kh6g5 Kh1g1 Rh5h8 Bh3f5
28 6:41:03 7.667.766,046 326.290 +0.09 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3 Kh6g5 Kh1g1 Rh5h8 Bh3f5
29 13:36:38 15.616.131,691 326.352 +0.10 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3 Kh6g5 Kh1g1 Rh5h8 Bh3f5
30 22:10:43 24.907.343,063 319.439 +0.09 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3 Kh6g5 Kh1g1 Rh5h8 Bh3f5
31 50:38:55 54.177.252,592 304.260 +0.09 Rg5h5 Rf2f3 Qe5f6 Qb3c3 Qf6xc3 Rf3xc3 Ng6e5 Bd5e6 Rg4g7 Be6h3
2/3/2010 10:49:57 PM, Time for this analysis: 00:00:00, Rated time: 72:00:00

0 of 1 matching moves
2/3/2010 10:49:58 PM, Total time: 12:00:11 AM
Rated time: 72:00:00 = 259200 Seconds

Enjoy,

Les

[PauloSoare]

Junior 2010, Robert? I buyed Bobby Junior 2010, but I can´t find
Junior 2010 ou Deep Junior 2010.

[Robert Flesher]

Junior 2010, Robert? I buyed Bobby Junior 2010, but I can´t find
Junior 2010 ou Deep Junior 2010.

Aye, this is how Bobby Junior shows up when used in the chessbase interface.

[PauloSoare]

You're right, I tested now. Do you know when will be released Deep Junior 2010?

[yanquis1972]

paulo, it is released.


firebird with 'test position' settings (SS off, VNM on, VR=10) finds Rg3 extremely quickly. (about a minute-minute & a half on my machine with default settings)


8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - -

Engine: FireBird 1.0 x64 (1024 MB)
by Kranium and Sentinel, based on IppoLit

15.01 0:01 +0.23 1...Qf6 2.c5 h3 3.gxh3 Rh4 4.cxd6 Qxd6
5.Qc3 Qd7 6.Rc2 Ne5 7.Qxc7 Qxh3
8.Rf2 Qe3 9.Rdf1 Nd3 10.Qd6+ Rg6
11.Qf8+ Kh5 12.Qh8+ Rh6 (7.140.705) 5053

15.27 0:01 +0.23 1...Qf6 2.c5 h3 3.gxh3 Rh4 4.cxd6 Qxd6
5.Qc3 Qd7 6.Rc2 Ne5 7.Qxc7 Qxh3
8.Rf2 Qe3 9.Rdf1 Nd3 10.Qd6+ Rg6
11.Qf8+ Kh5 12.Qh8+ Rh6 (7.144.359) 5045

16.27 0:01 +0.31-- 1...Qf6 2.c5 h3 3.gxh3 Rh4 4.cxd6 Qxd6
5.Qc3 Qd7 6.Rc2 Ne5 7.Qxc7 Qxh3
8.Rf2 Qe3 9.Rdf1 Nd3 10.Qd6+ Rg6
11.Qf8+ Kh5 12.Qh8+ Rh6 (8.451.134) 5042

16.13 0:02 +0.15++ 1...Rh5 (10.539.243) 5111

16.13 0:02 +0.15++ 1...Rh5 (10.539.243) 5111

16.01 0:02 +0.03++ 1...Rh5 (11.588.352) 5166

16.01 0:02 +0.03++ 1...Rh5 (11.588.352) 5166

16.01 0:02 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (15.490.554) 5290

16.27 0:02 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (15.494.709) 5286

17.01 0:03 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (16.393.824) 5310

17.27 0:03 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (17.079.905) 5312

18.01 0:03 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (18.363.714) 5360

18.27 0:03 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (19.010.797) 5325

19.01 0:04 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (23.490.311) 5465

19.27 0:04 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (24.578.163) 5429

20.01 0:05 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (31.990.718) 5625

20.27 0:06 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (34.096.716) 5600

21.01 0:07 0.00 1...Rh5 2.Rf3 Rhg5 3.Rf2 (45.410.574) 5768

21.26 0:12 -0.08++ 1...Rg3 (71.261.812) 5856

21.26 0:12 -0.08++ 1...Rg3 (71.261.812) 5856

21.01 0:13 -0.16++ 1...Rg3 (76.157.566) 5856

21.01 0:13 -0.16++ 1...Rg3 (76.157.566) 5856

21.01 0:14 -0.28++ 1...Rg3 (83.916.553) 5853

21.01 0:14 -0.28++ 1...Rg3 (83.916.553) 5853

21.01 0:17 -0.46++ 1...Rg3 (101.032.418) 5865

21.01 0:17 -0.46++ 1...Rg3 (101.032.418) 5865

21.01 0:27 -0.73 1...Rg3 (163.071.461) 5959

best move: Rg4-g3 time: 0:27.534 min n/s: 5.959.000 CPU 99.3% n/s(1CPU): 6.001.007 nodes: 163.071.461

[David Dahlem]

firebird with 'test position' settings (SS off, VNM on, VR=10) finds Rg3 extremely quickly. (about a minute-minute & a half on my machine with default settings)

Perhaps this version could be called "Firebird Winfinder".

[ernest]

firebird with 'test position' settings (SS off, VNM on, VR=10)...

Hi David,
I suppose
SS = NMR Smooth Scaling
VNM = Null Move Verification
VR = Verification Reduction

How (where) did you find these settings?

Why do they help in this case?

[yanquis1972]

i didn't find them, just made them up. i'm not hep to programming lingo and only have a vague-to-no idea of what those terms mean (smooth scaling? no idea), but my guess is that it forces firebird to look deeper into moves it would normally prune out earlier in the search. at any rate it demonstrably helped in that position. not sure how strong the settings would be in actual game play or even if they're good in general for test positions, though i would assume so.