Barta-Kluger (Hungary) 1979

[Marc MP]

[D]r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - - 0 1

[PauloSoare]

[D]r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - - 0 1

Marc, Hiarcs 11.1 mp it´s very good in tactics.

New game
r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - - 0 1

Analysis by HIARCS 11.1 MP UCI:

1...Bc8-e6 2.Nc3-d5 Be6xd5 3.e4xd5 Qe7-f6 4.Nb5xd4 c5xd4
= (-0.11) Depth: 9/22 00:00:00 235kN
1...Bc8-e6 2.Nc3-d5 Be6xd5 3.e4xd5 Qe7-f6 4.f2-f3 Nd4xb5 5.c4xb5 Qf6-f5 6.Rf1-e1 Qf5xd3 7.Bb1xd3
= (-0.08) Depth: 10/22 00:00:00 386kN
1...Bc8-g4
= (-0.09) Depth: 10/22 00:00:01 470kN
1...Bc8-g4 2.f2-f3 Bg4-e6 3.a2-a4 Bg5-f4
= (-0.13) Depth: 10/24 00:00:01 553kN
1...Bc8-g4 2.Nc3-d5 Nd4-e2+ 3.Kg1-h1 Ne2-f4 4.Qd3-g3 Qe7-d7 5.f2-f3
= (0.10) Depth: 11/27 00:00:02 1232kN
1...Bc8-e6
= (0.10) Depth: 11/27 00:00:02 1257kN
1...Bc8-e6 2.Nc3-d5 Be6xd5 3.e4xd5 Qe7-f6 4.Qd3-e4 Nd4xb5 5.c4xb5 Qf6-f5 6.Qe4-e2 Qf5-f7 7.Bb1-e4 Bg5-h4
= (-0.19) Depth: 11/27 00:00:03 1681kN
1...Bc8-e6 2.Nc3-d5 Be6xd5 3.e4xd5 Qe7-f6 4.Qd3-e4 Nd4xb5 5.c4xb5 Qf6-f5 6.Qe4-e2 Qf5-f7 7.Bb1-e4 Bg5-h4 8.g2-g3
= (-0.08) Depth: 12/27 00:00:04 2420kN
1...Bc8-e6 2.Nc3-d5 Be6xd5 3.e4xd5 Qe7-f6 4.Nb5xd4 c5xd4 5.Kg1-h1 Qf6-f5 6.Qd3-e2 Qf5-d7 7.h2-h4 Bg5-f4
= (-0.11) Depth: 13/31 00:00:10 5185kN
1...Rf8-f3
= (-0.12) Depth: 13/33 00:00:14 7260kN
1...Rf8-f3
³ (-0.33) Depth: 13/34 00:00:14 7463kN
1...Rf8-f3 2.g2xf3 Bg5-f4 3.Nc3-d5 Bf4xh2+ 4.Kg1xh2 Qe7-h4+ 5.Kh2-g1 Bc8-h3 6.f3-f4 Qh4-g4+ 7.Qd3-g3 Nd4-e2+ 8.Kg1-h2 Ne2xg3 9.f2xg3 Qg4-h5 10.Nd5-f6 Kg7xf6 11.Rd1xd6+ Kf6-f7
-+ (-2.03) Depth: 13/34 00:00:15 8141kN
1...Rf8-f3
-+ (-2.28) Depth: 14/34 00:00:18 9355kN
1...Rf8-f3 2.g2xf3 Bg5-f4 3.Nc3-d5 Bf4xh2+ 4.Kg1xh2 Qe7-h4+ 5.Kh2-g1 Bc8-h3 6.f3-f4 Qh4-g4+ 7.Qd3-g3 Nd4-e2+ 8.Kg1-h2 Ne2xg3 9.f2xg3 Qg4-h5 10.Nd5-f6 Kg7xf6 11.Rd1xd6+ Bh3-e6+ 12.Kh2-g1 Qh5-h3 13.f4xe5+ Kf6xe5
-+ (-2.54) Depth: 14/36 00:00:19 10369kN
1...Rf8-f3
-+ (-2.79) Depth: 15/36 00:00:26 13927kN
1...Rf8-f3 2.g2xf3 Bg5-f4 3.Nc3-d5 Bf4xh2+ 4.Kg1xh2 Qe7-h4+ 5.Kh2-g1 Bc8-h3 6.f3-f4 Qh4-g4+ 7.Qd3-g3 Nd4-e2+ 8.Kg1-h2 Ne2xg3 9.f2xg3 Qg4-h5 10.Nd5-f6 Kg7xf6 11.Rd1xd6+ Kf6-e7 12.Rf1-h1 Qh5-f3 13.Rh1-g1
-+ (-2.92) Depth: 15/36 00:00:30 16371kN
1...Rf8-f3
-+ (-3.17) Depth: 16/39 00:00:48 26269kN
1...Rf8-f3 2.g2xf3 Bg5-f4 3.Nc3-d5 Bf4xh2+ 4.Kg1xh2 Qe7-h4+ 5.Kh2-g1 Bc8-h3 6.f3-f4 Qh4-g4+ 7.Qd3-g3 Nd4-e2+ 8.Kg1-h2 Ne2xg3 9.f2xg3 Qg4-h5 10.Rf1-e1 Bh3-g4+ 11.Kh2-g1 Bg4xd1 12.Nb5xd6 Ra8-b8 13.Bb1-d3
-+ (-3.57) Depth: 16/41 00:01:23 44220kN
1...Rf8-f3 2.g2xf3 Bg5-f4 3.Nc3-d5 Bf4xh2+ 4.Kg1xh2 Qe7-h4+ 5.Kh2-g1 Bc8-h3 6.f3-f4 Qh4-g4+ 7.Qd3-g3 Nd4-e2+ 8.Kg1-h2 Ne2xg3 9.f2xg3 Qg4-h5 10.Nd5-f6 Kg7xf6 11.Rd1xd6+ Kf6-e7 12.Rf1-f2 Bh3-d7+ 13.Kh2-g1 Bd7xb5 14.Rd6-d5
-+ (-3.76) Depth: 17/41 00:02:51 90644kN

(Soares, Residencia 08.05.2007)

[jdart]

22 seconds for Arasan 9.5, on a fairly slow machine:

Code: Select all

Bm:  Rf3

no    1         0     +6           60 Qf6
no    2         0    -31          342 Qf6 Nd5
no    3         0    -25         1973 Nxb5 Nxb5 Bg4
no    4        10    -31         7130 Nxb5 cxb5 Bg4 Nd5
no    5        50    -25        32766 Qd7 Nd5 Nxb5 cxb5 Qg4
no    6       170    -31       105133 Qd8 Bc2 Nxb5 Nxb5 Bg4 f3
no    7       340    -12       220075 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5
no    8       820    -18       516623 Bg4 f3 Be6 a3 Kg8 Nd5 Bxd5 cxd5
no    9      1340    -12       846039 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 Nxd4 exd4
no   10      4280    -31      2700016 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 g4 Rf6 Qe4
no   11     12990    -31      7851306 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 Qa3 Nxb5
                                      cxb5 Rff8 Qd3
yes  12     22780    +18     13844841 Rf3 gxf3
yes  12     23430    +82     14265135 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Ne2+
                                      Qxe2 Qg5+ Kh2 Qh4+ Kg1 Qg5+ Kh2 Qh4+ Kg1
yes  13     26460    +82     16165374 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Ne2+
                                      Qxe2 Qg5+ Kh2 Qh4+ Kg1 Qg5+ Kh2 Qh4+ Kg1
yes  14     29390   +132     18067335 Rf3 gxf3
yes  14     37640   +137     23337784 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3
                                      f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 exf4 Nxf4
yes  15     41170   +137     25580510 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3
                                      f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 exf4 Nxf4

[Marc MP]

22 seconds for Arasan 9.5, on a fairly slow machine:

Code: Select all

Bm:  Rf3

no    1         0     +6           60 Qf6
no    2         0    -31          342 Qf6 Nd5
no    3         0    -25         1973 Nxb5 Nxb5 Bg4
no    4        10    -31         7130 Nxb5 cxb5 Bg4 Nd5
no    5        50    -25        32766 Qd7 Nd5 Nxb5 cxb5 Qg4
no    6       170    -31       105133 Qd8 Bc2 Nxb5 Nxb5 Bg4 f3
no    7       340    -12       220075 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5
no    8       820    -18       516623 Bg4 f3 Be6 a3 Kg8 Nd5 Bxd5 cxd5
no    9      1340    -12       846039 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 Nxd4 exd4
no   10      4280    -31      2700016 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 g4 Rf6 Qe4
no   11     12990    -31      7851306 Bg4 f3 Be6 Nd5 Bxd5 exd5 Rf5 Qa3 Nxb5
                                      cxb5 Rff8 Qd3
yes  12     22780    +18     13844841 Rf3 gxf3
yes  12     23430    +82     14265135 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Ne2+
                                      Qxe2 Qg5+ Kh2 Qh4+ Kg1 Qg5+ Kh2 Qh4+ Kg1
yes  13     26460    +82     16165374 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Ne2+
                                      Qxe2 Qg5+ Kh2 Qh4+ Kg1 Qg5+ Kh2 Qh4+ Kg1
yes  14     29390   +132     18067335 Rf3 gxf3
yes  14     37640   +137     23337784 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3
                                      f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 exf4 Nxf4
yes  15     41170   +137     25580510 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3
                                      f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 exf4 Nxf4

Hi Jon,

22 sec is quite good! SlowChess WV 2.1:

SlowChess Blitz WV2.1 (190 MB hash)
FEN: r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - -

[17] -2.20 06:00.7 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 Qh5 Nf6 Kxf6 Rxd6+ Kg7 Rc1 exf4 gxf4
[16] -1.88 02:49.6 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 Qh5 Nf6 Kxf6 Rxd6+ Kg7 Rfd1 exf4 gxf4
[15] -1.16 01:19.7 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 Rg1 Bg2 Kxg2 Nxe4+ Kh2 Qh4+ Kg2 Qxf2+ Kh3 Qf3+ Kh2
[14] -1.12 00:40.9 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 Rg1 Bg2 Kxg2 Nxe4+ Kh2 Qh4+ Kg2 Qxf2+ Kh1
[13] -1.00 00:24.9 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 exf4 Nxf4 Bxf1 Rxf1
[12] -0.76 00:15.9 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 Bxf1 Rxf1 exf4 gxf4
[11] -0.76 00:15.1 Rf3 gxf3 Bf4 Nd5 Bxh2+ Kxh2 Qh4+ Kg1 Bh3 f4 Qg4+ Qg3 Ne2+ Kh2 Nxg3 fxg3 Bxf1 Rxf1 exf4 gxf4
[11] -0.28 00:14.8 Rf3 {++}
[11] -0.28 00:07.8 Be6 Nd5 Bxd5 exd5 Rf5 Nxd4 cxd4 g3 Qf7 f4 exf4 Qxd4+ Bf6
[10] -0.28 00:02.8 Be6 Nd5 Bxd5 exd5 Rf5 Nxd4 cxd4 g3 Qf7 f4 exf4 Qxd4+ Bf6
[9] -0.40 00:01.2 Be6 Nd5 Bxd5 exd5 Rf5 a4 Bf4 Kh1 Nxb5 axb5
[8] -0.36 00:00.4 Be6 Nd5 Bxd5 exd5 Rf6 Nc3 Raf8 f3
[7] -0.36 00:00.1 Be6 Nd5 Bxd5 exd5 Rf6 a4 a6 Nxd4 cxd4
[6] -0.48 00:00.0 Be6 Nd5 Bxd5 exd5 Qf6 Nc7
[5] -0.40 00:00.0 Be6 Nd5 Bxd5 exd5 Qf6
[4] -0.52 00:00.0 Be6 Nd5 Bxd5 exd5
[3] -0.52 00:00.0 Be6 Nd5 Bxd5 exd5
[2] -0.68 00:00.0 Be6 f3
[2] -0.52 00:00.0 Bd7 Nd5

3.2Ghz PIV Precott.

BTW: Have you noticed that number 187 and 197 in Arasan7 are identical?

[PauloSoare]

Arasan 9.5 64 on my computer and Arena GUI:

FEN: r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - - 0 1

Arasan 9.5:
1 00:00 60 6.000 +0.06 Qe7f6
2 00:00 342 34.200 -0.31 Qe7f6 Nc3d5
3 00:00 1.973 197.300 -0.25 Nd4xb5 Nc3xb5 Bc8g4
4 00:00 7.130 237.666 -0.31 Nd4xb5 c4xb5 Bc8g4 Nc3d5
5 00:00 32.766 819.150 -0.25 Qe7d7 Nc3d5 Nd4xb5 c4xb5 Qd7g4
6 00:00 105.133 750.950 -0.31 Qe7d8 Bb1c2 Nd4xb5 Nc3xb5 Bc8g4 f2f3
7 00:00 220.075 846.442 -0.12 Bc8g4 f2f3 Bg4e6 Nc3d5 Be6xd5 e4xd5 Rf8f5
8 00:00 516.621 846.919 -0.18 Bc8g4 f2f3 Bg4e6 a2a3 Kg7g8 Nc3d5 Be6xd5 c4xd5
9 00:01 846.030 863.295 -0.12 Bc8g4 f2f3 Bg4e6 Nc3d5 Be6xd5 e4xd5 Rf8f5 Nb5xd4 e5xd4
10 00:03 2.672.531 879.122 -0.31 Bc8g4 f2f3 Bg4e6 Nc3d5 Be6xd5 e4xd5 Rf8f5 g2g4 Rf5f6 Qd3e4
11 00:09 7.851.857 871.460 -0.31 Bc8g4 f2f3 Bg4e6 Nc3d5 Be6xd5 e4xd5 Rf8f5 Qd3a3 Nd4xb5 c4xb5 Rf5f8 Qa3d3

12 00:15 13.786.542 883.186 +0.18 Rf8f3 g2xf3 12 00:16 14.202.300 885.430 +0.82 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Nd4e2+ Qd3xe2 Qh4g5+ Kg1h2 Qg5h4+ Kh2g1 Qh4g5+ Kg1h2 Qg5h4+ Kh2g1
13 00:18 16.078.780 890.297 +0.82 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Nd4e2+ Qd3xe2 Qh4g5+ Kg1h2 Qg5h4+ Kh2g1 Qh4g5+ Kg1h2 Qg5h4+ Kh2g1
14 00:20 17.960.077 897.555 +1.32 Rf8f3 g2xf3
14 00:25 23.095.104 906.757 +1.37 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4
15 00:37 34.470.047 916.269 +1.37 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4 Bh3xf1
16 01:08 62.550.173 916.486 +1.37 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4 Bh3xf1 Rd1xf1
17 02:31 139.698.881 924.484 +1.31 Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Bh3xf1 Rd1xf1 Qg4e2+ Kh2g1 Qe2g4 Kg1h2

[Eelco de Groot]

Toga 1.3x4 Default needs 18 seconds to Find 1. ... Rf3, Toga 1.3 "Checkov" , with Material = 100 so the second version, finds it in four seconds on single core Athlon 2009 MHz, 256 Mb hash. After a while Toga Checkov thinks that 2. Nd5 is the best reply.

[D]r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - -

Engine: Toga II 1.3x4 Default (256 MB)
gemaakt door Thomas Gaksch and Fabien Letouzey

10/27 0:01 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxf1 6.Kxf1 Pxb5 7.cxb5 gxf5
8.Lxf5 Tf8 (899.221) 730

10/33 0:01 +0.42 1...Le6 2.Pd5 Lxd5 3.exd5 Tf6 4.Pc3 Kh8
5.Lc2 Tf5 6.Tde1 Lh4 (1.205.699) 730

11/33 0:02 +0.34 1...Le6 2.Pd5 Lxd5 3.exd5 Tf6 4.Pxd4 cxd4
5.Tde1 Dd7 6.Lc2 Tc8 7.Te4 Kh7 (1.672.652) 722

12/33 0:04 -0.01 1...Le6 2.Pd5 Lxd5 3.exd5 Df6 4.Pc7 Tad8
5.Dh3 Pe2+ 6.Kh1 Pf4 7.Dg4 h5 8.Df3 Kh8 (3.097.938) 707

12/33 0:05 +0.24 1...Lg4 2.Pd5 Dd7 3.f3 Pxb5 4.fxg4 Pd4
5.h3 Kh8 6.Lc2 Tac8 7.a3 (3.917.548) 713

13/35 0:10 +0.23 1...Lg4 2.Pd5 Dd7 3.f3 Pxb5 4.fxg4 Pd4
5.h3 Da4 6.Kh1 Kh8 7.a3 Lf4 (7.276.544) 724

13/44 0:18 +1.87++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 (13.431.495) 723

14/44 0:19 +1.87 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Lxf1
11.Txf1 De2+ 12.Kg1 exf4 13.gxf4 (14.437.891) 726

15/44 0:24 +2.14 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Le6+ 13.Kg1 (18.089.933) 731

16/53 0:31 +2.06 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 (23.222.507) 737

17/55 0:48 +2.38 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 Le6+
14.Kg1 (36.313.970) 749

18/55 1:15 +2.38 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 Le6+
14.Kg1 (56.919.594) 755


r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - -

Engine: Toga 1.3 "Checkov" 2 (256 MB)
gemaakt door Thomas Gaksch and Fabien Letouzey

10/26 0:00 +0.36 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxf1 6.Kxf1 Pxb5 7.cxb5 gxf5
8.Lxf5 Tf8 (649.506)

11/30 0:01 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxc4 6.Pxd6 Lxf1 7.Kxf1 Td8
8.Pxb7 (1.263.215) 705

12/31 0:03 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ gxf5
5.Lxd3 Pxb5 6.cxb5 Tad8 7.exf5 d5
8.b6 axb6 9.Tfe1 c4 (2.180.431) 720

12/33 0:04 +0.47 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Dg5+ 6.Kh2 Dh5+
7.Kg2 Dh3+ 8.Kg1 Pxf3+ 9.Dxf3 Dxf3
10.Td3 Dxe4 11.Pbc7 Tb8 12.Pe8+ Kf8
13.Pxd6 (3.496.976) 709

13/38 0:06 +2.01++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 (4.531.818) 714

14/38 0:07 +1.94 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 Tf8
13.Pxd6 Dxb2 (5.134.402) 721

15/40 0:09 +2.08 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 Td8
13.b3 (7.245.312) 723

16/43 0:17 +2.25 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 (12.562.105) 735

17/61 0:33 +2.59 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 13.Th1 exf4
14.gxf4 (24.551.395) 738

18/61 0:54 +2.59 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 13.Th1 exf4
14.gxf4 (40.006.622) 734

19/61 2:12 +3.59++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 exf4
14.Lc2 fxg3+ (98.215.168) 743

20/64 5:41 +4.28++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Tfe1 Lg4+ 12.Kg1 Lxd1 13.Pxd6 exf4
14.gxf4 Dg4+ (251.190.645) 735

21/64 8:54 +4.08 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Tfe1 Lg4+ 12.Kg1 Lxd1 13.Pxd6 exf4
14.Pxf4 Dg4 (387.802.061) 726

22/68 24:19 +4.30 1...Tf3 2.Pd5 Txd3 3.Pxe7 Txd1
4.Pf5+ Lxf5 5.Txd1 Lg4 6.f3 Le3+
7.Kf1 Le6 8.Pxd6 Td8 9.Pxb7 Tb8
10.Pxc5 Lxc4+ 11.Ld3 Txb2 12.Te1 Tf2+
13.Kg1 Pe2+ 14.Kh1 Lxa2 (1.056.485.453) 723



Eelco

[Marc MP]

Toga 1.3x4 Default needs 18 seconds to Find 1. ... Rf3, Toga 1.3 "Checkov" , with Material = 100 so the second version, finds it in four seconds on single core Athlon 2009 MHz, 256 Mb hash. After a while Toga Checkov thinks that 2. Nd5 is the best reply.

[D]r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - -

Engine: Toga II 1.3x4 Default (256 MB)
gemaakt door Thomas Gaksch and Fabien Letouzey

10/27 0:01 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxf1 6.Kxf1 Pxb5 7.cxb5 gxf5
8.Lxf5 Tf8 (899.221) 730

10/33 0:01 +0.42 1...Le6 2.Pd5 Lxd5 3.exd5 Tf6 4.Pc3 Kh8
5.Lc2 Tf5 6.Tde1 Lh4 (1.205.699) 730

11/33 0:02 +0.34 1...Le6 2.Pd5 Lxd5 3.exd5 Tf6 4.Pxd4 cxd4
5.Tde1 Dd7 6.Lc2 Tc8 7.Te4 Kh7 (1.672.652) 722

12/33 0:04 -0.01 1...Le6 2.Pd5 Lxd5 3.exd5 Df6 4.Pc7 Tad8
5.Dh3 Pe2+ 6.Kh1 Pf4 7.Dg4 h5 8.Df3 Kh8 (3.097.938) 707

12/33 0:05 +0.24 1...Lg4 2.Pd5 Dd7 3.f3 Pxb5 4.fxg4 Pd4
5.h3 Kh8 6.Lc2 Tac8 7.a3 (3.917.548) 713

13/35 0:10 +0.23 1...Lg4 2.Pd5 Dd7 3.f3 Pxb5 4.fxg4 Pd4
5.h3 Da4 6.Kh1 Kh8 7.a3 Lf4 (7.276.544) 724

13/44 0:18 +1.87++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 (13.431.495) 723

14/44 0:19 +1.87 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Lxf1
11.Txf1 De2+ 12.Kg1 exf4 13.gxf4 (14.437.891) 726

15/44 0:24 +2.14 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Le6+ 13.Kg1 (18.089.933) 731

16/53 0:31 +2.06 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 (23.222.507) 737

17/55 0:48 +2.38 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 Le6+
14.Kg1 (36.313.970) 749

18/55 1:15 +2.38 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 Le6+
14.Kg1 (56.919.594) 755


r1b2r2/pp2q1k1/3p2pp/1Np1p1b1/2PnP3/2NQ4/PP3PPP/1B1R1RK1 b - -

Engine: Toga 1.3 "Checkov" 2 (256 MB)
gemaakt door Thomas Gaksch and Fabien Letouzey

10/26 0:00 +0.36 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxf1 6.Kxf1 Pxb5 7.cxb5 gxf5
8.Lxf5 Tf8 (649.506)

11/30 0:01 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ Txf5
5.exf5 Lxc4 6.Pxd6 Lxf1 7.Kxf1 Td8
8.Pxb7 (1.263.215) 705

12/31 0:03 +0.33 1...Lg4 2.Pd5 Le2 3.Pxe7 Lxd3 4.Pf5+ gxf5
5.Lxd3 Pxb5 6.cxb5 Tad8 7.exf5 d5
8.b6 axb6 9.Tfe1 c4 (2.180.431) 720

12/33 0:04 +0.47 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Dg5+ 6.Kh2 Dh5+
7.Kg2 Dh3+ 8.Kg1 Pxf3+ 9.Dxf3 Dxf3
10.Td3 Dxe4 11.Pbc7 Tb8 12.Pe8+ Kf8
13.Pxd6 (3.496.976) 709

13/38 0:06 +2.01++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 (4.531.818) 714

14/38 0:07 +1.94 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 Tf8
13.Pxd6 Dxb2 (5.134.402) 721

15/40 0:09 +2.08 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+
4.Kxh2 Dh4+ 5.Kg1 Lh3 6.f4 Dg4+
7.Dg3 Pe2+ 8.Kh2 Pxg3 9.fxg3 Lxf1
10.Txf1 De2+ 11.Kg1 exf4 12.gxf4 Td8
13.b3 (7.245.312) 723

16/43 0:17 +2.25 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 (12.562.105) 735

17/61 0:33 +2.59 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 13.Th1 exf4
14.gxf4 (24.551.395) 738

18/61 0:54 +2.59 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Kg7 13.Th1 exf4
14.gxf4 (40.006.622) 734

19/61 2:12 +3.59++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Pf6 Kxf6 12.Txd6+ Ke7 13.Th1 exf4
14.Lc2 fxg3+ (98.215.168) 743

20/64 5:41 +4.28++ 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Tfe1 Lg4+ 12.Kg1 Lxd1 13.Pxd6 exf4
14.gxf4 Dg4+ (251.190.645) 735

21/64 8:54 +4.08 1...Tf3 2.gxf3 Lf4 3.Pd5 Lxh2+ 4.Kg2 Dg5+
5.Kxh2 Dh4+ 6.Kg1 Lh3 7.f4 Dg4+
8.Dg3 Pe2+ 9.Kh2 Pxg3 10.fxg3 Dh5
11.Tfe1 Lg4+ 12.Kg1 Lxd1 13.Pxd6 exf4
14.Pxf4 Dg4 (387.802.061) 726

22/68 24:19 +4.30 1...Tf3 2.Pd5 Txd3 3.Pxe7 Txd1
4.Pf5+ Lxf5 5.Txd1 Lg4 6.f3 Le3+
7.Kf1 Le6 8.Pxd6 Td8 9.Pxb7 Tb8
10.Pxc5 Lxc4+ 11.Ld3 Txb2 12.Te1 Tf2+
13.Kg1 Pe2+ 14.Kh1 Lxa2 (1.056.485.453) 723



Eelco

Hi Eelco,

What are your Checkov settings? I'm curious as always.

[Dann Corbit]

Glaurung (bitboard beta):

Code: Select all

2) Rf3; id "Barta-Kluge 
    Searching move: Rf8-f3
    Best move (Glaurung): Rf8-f3
    identical moves! Found in: 01:02
      2	00:00	         643	0	+0.80	Bc8g4 Nc3d5
      2	00:00	         806	0	+0.88	Bg5h4 Nc3d5
      3	00:00	       1.270	0	+0.49	Bg5h4 Nc3d5 Qe7d8 Nb5xd4 c5xd4
      3	00:00	       1.498	0	+0.68	Bc8g4 Nc3d5 Nd4e2+ Kg1h1
      3	00:00	       1.655	0	+0.70	Bc8e6 Nc3d5 Be6xd5 Nb5xd4
      4	00:00	       2.926	0	+0.64	Bc8e6 Nb5xd4 c5xd4 Nc3d5 Be6xd5 c4xd5
      5	00:00	       6.166	0	+0.72	Bc8e6 Nb5xd4 c5xd4 Nc3d5 Be6xd5 e4xd5 Rf8f5
      6	00:00	      17.125	1.070.312	+0.58	Bc8e6 Nb5xd4 c5xd4 Nc3d5 Be6xd5 e4xd5 Rf8f5 Bb1c2
      7	00:00	      46.118	732.031	+0.41	Bc8e6 Nc3d5 Be6xd5 c4xd5 Bg5h4 f2f3 Bh4g5 Nb5xd4 c5xd4
      8	00:00	     102.150	817.200	+0.56	Bc8e6 Nc3d5 Be6xd5 c4xd5 Qe7d7 Nb5xd4 c5xd4 Bb1c2 Ra8c8 Qd3e2
      9	00:00	     219.336	777.787	+0.37	Bc8e6 Nc3d5 Be6xd5 c4xd5 Qe7d7 Nb5xd4 c5xd4 Qd3a3 Bg5h4 f2f3 Bh4g5
     10	00:01	     553.027	785.549	+0.15	Bc8e6 Nc3d5 Qe7d7 f2f4 Rf8xf4 Rf1xf4 Bg5xf4 Nb5xd4 Be6xd5 e4xd5 c5xd4 Qd3xg6+ Kg7f8 Qg6f6+ Kf8e8
     11	00:01	   1.280.324	772.675	+0.15	Bc8e6 Nc3d5 Qe7d7 f2f4 Bg5xf4 Nb5xd4 Be6xd5 e4xd5 c5xd4 Qd3xg6+ Kg7h8 Bb1e4 Bf4e3+ Kg1h1 Rf8xf1+ Rd1xf1
     11	00:02	   1.605.773	772.377	+0.39	Bc8g4 Nc3d5 Nd4e2+ Kg1h1 Ne2f4 Nd5xf4 Bg5xf4 Qd3xd6 Qe7g5 Qd6xc5 Bg4xd1 Rf1xd1 Qg5g4 Qc5e7+ Rf8f7
     12	00:03	   2.658.027	776.746	+0.39	Bc8g4 Nc3d5 Qe7d7 f2f3 Nd4xb5 c4xb5 Bg4e6 Qd3e2 Rf8f7 Bb1c2 Ra8f8 Rf1e1 Be6xd5 Rd1xd5
     13	00:06	   4.568.756	781.785	+0.31	Bc8g4 Nc3d5 Qe7d7 f2f3 Nd4xb5 c4xb5 Bg4e6 Qd3e2 Ra8c8 Bb1c2 Be6g8 Rf1e1 Bg5h4 g2g3 Bg8xd5 Rd1xd5
     14	00:12	   9.525.081	786.546	+0.45	Bc8g4 Nc3d5 Qe7d7 f2f3 Nd4xb5 c4xb5 Bg4e6 Qd3e2 Ra8c8 Bb1c2 c5c4 a2a4 Qd7d8 Rf1e1 Be6xd5 Rd1xd5
     15	00:26	  19.532.155	758.500	+0.47	Bc8g4 Nc3d5 Qe7d7 f2f3 Nd4xb5 c4xb5 Bg4e6 Qd3e2 Ra8c8 Bb1c2 c5c4 a2a4 Qd7d8 Rf1e1 Be6xd5 Rd1xd5 Qd8b6+ Qe2f2
     16	00:43	  33.548.670	781.874	+0.47	Bc8g4 Nc3d5 Qe7d7 f2f3 Nd4xb5 c4xb5 Bg4e6 Qd3e2 Ra8c8 Bb1c2 c5c4 a2a4 Qd7d8 Rf1e1 Qd8d7 Qe2f2 Be6xd5 Rd1xd5
     16	01:02	  49.587.855	793.570	+1.50	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4 Bh3xf1 Rd1xf1 Qg4d7
     17	01:09	  55.212.745	795.824	+1.07	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4 Bh3xf1 Rd1xf1 g6g5 Nf4d5 Qg4e2+ Kh2g1 Qe2xb2 Nb5xd6
     18	01:37	  77.825.403	800.359	+1.07	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 e5xf4 Nd5xf4 Bh3xf1 Rd1xf1 g6g5 Nf4d5 Qg4e2+ Kh2g1 Qe2xb2 Nb5xd6
     19	02:50	 138.639.113	815.121	+3.56	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Qg4h5 Nd5f6 Kg7xf6 Rd1xd6+ Kf6g7 Rf1f2 e5xf4 g3xf4 Bh3e6+ Kh2g1 Be6xc4
     20	04:09	 204.692.550	822.907	+3.62	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Qg4h5 Nd5f6 Kg7xf6 Rd1xd6+ Kf6e7 g3g4 Bh3xg4+ Kh2g1 e5xf4 Rf1xf4 Bg4f3
     21	06:47	 339.748.436	834.543	+4.03	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Qg4h5 Rf1e1 Bh3g4+ Kh2g1 Bg4xd1 Nb5xd6 e5xf4 g3xf4 Qh5g4+ Kg1f1 Qg4h3+ Kf1g1 Qh3g3+ Kg1f1
     22	12:00	 607.858.324	843.597	+4.25	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Qg4h5 Rf1e1 Bh3g4+ Kh2g1 Bg4xd1 Nb5xd6 Qh5g4 Kg1h2 e5xf4 Nd5xf4 Ra8d8 e4e5
     23	21:10	1.070.192.733	843.083	+4.03	Rf8f3 g2xf3 Bg5f4 Nc3d5 Bf4xh2+ Kg1xh2 Qe7h4+ Kh2g1 Bc8h3 f3f4 Qh4g4+ Qd3g3 Nd4e2+ Kg1h2 Ne2xg3 f2xg3 Qg4h5 Rf1e1 Bh3g4+ Kh2g1 Bg4xd1 Nb5xd6 Qh5g4 Kg1h2 Qg4h5+ Kh2g1 e5xf4 g3xf4 Qh5g4+ Kg1f2 Qg4f3+ Kf2g1 Qf3g3+ Kg1f1
   5/9/2007 1:20:08 AM, Time for this analysis: 00:29:55, Rated time: 31:02

[Eelco de Groot]

Hi Eelco,

What are your Checkov settings? I'm curious as always.

Hi Marc,

I appreciate the interest!

The Toga Checkov settings were made to solve one of the combination testpositions from Michael Gurevich, No. 277 from a game by Valery Chekov (Чехов). So the name "Checkov" was initially a mistake. Reminded me a bit of Zarkov. Maybe one day there will be discovered a lost episode of Star Trek with Pavel Chekov playing a game against Toga Checkov and he will claim it was programmed by one of his Russian kosmonaut ancestors, on the last functional boardcomputer of space station Mir, to pass the time.

Suddenly "Q" materalizes on the Enterprise bridge and he wants to organize an interstellar chessmatch against a Klingon chessprogram, Rubka, the winner will get the shipping rights to the Delta quadrant.

I haven't thought of an ending yet...

But about the settings; not very much has changed from Blueberry 0.94a, only thing I was experimenting with was a History Treshold of 95. I'm not sure it can be very good, as 90 is already a lot and in Toga 1.2.1a the History Treshold was only 70. But in rapid games against Deep Sjeng it is not doing very bad either, but it takes a while to get a fair number of games at the timecontrol I was testing now, twenty minutes + ten seconds bonus. The only other change was a one unit raise in Piece Activity, that can't hurt the settings very much although I would not go higher either.

So that gives the following Toga 1.3 Checkov 2 Settings:

Hash = 128 [256 Mb for Analysis, less for Blitz games]
Search Time = 0 [Default]
Search Depth = 0 [Default]
BookFile = performance.bin [Default, but not in use because the Shredder book is used as a "neutral" book]
Bitbases Path = <empty> [Default = D:\egbb5\egbb]
Bitbases Cache Size = 16
NullMove Pruning = Always [Default]
NullMove Reduction = 3 [Default]
Verification Search = Always [Default]
Verification Reduction = 6 [Default = 5]
History Pruning = true [Default]
History Threshold = 95 [Default = 75, Blueberry 0.94a = 90]
Futility Pruning = true [Default]
Futility Margin = 120 [Default = 100]
Extended Futility Margin = 220 [Default = 200]
Delta Pruning = true [Default]
Delta margin = 55 [Default = 50]
Quiescence Check Plies = 1 [Default]
Material = 100 [= Default, only change from Checkov 1 with Material = 95]
Piece Activity = 103 [Default = 100, Blueberry 0.94a = 102]
Piece Square Activity = 103 [Default = 100]
King Safety = 125 [Default = 100]
Pawn Structure = 106 [Default = 100]
Passed Pawns = 106 [Default = 100]
Toga Lazy Eval = true [Default]
Toga Lazy Eval Margin = 240 [Default = 200]
Toga King Safety = true [Default]
Toga Extended History Pruning = true [Default]

Some match results for Toga Checkov will follow later but I can only compare the results against Deep Sjeng 2.5 as an opponent.

Eelco

[Marc MP]

Thank you Eelco,

I'm away from home now, but I check Checkov (!) on Friday. Thank you posting the settings.