Vass wrote on 11/03/11 at 12:01:04:

As correspondence chess players know...the engines are far from perfection. One may look at this position with

*Houdini, Rybka or whatever and never find the win for black *(position taken from a correspondence chess game):

Then try to think yourself, analyze a bit...and you'll see:

1... g3! 2. h3 Bxh3! 3. gxh3 g2 4. Rfc1 Qh4-+

They use to to say correspondence chess is dead. Yes, it's dead...when relying only on machines.

Never draw conclusions without analysing properly. As I said You need to know what and How to use engines.

3: 1...g3!!

r5rk/1ppb1p1p/1n1p1q2/3Pb3/1PPNPpp1/3Q1P2/2B1N1PP/1R3RK1 b - - 0 1

Analysis by SPARK-1.0-win64-mp-corei TA:

1...Ra2 2.Nf5

-+ (-6.38 ++) Depth: 7/9 00:00:00 36kN

1...Ra2 2.Nf5

-+ (-6.63 ++) Depth: 7/9 00:00:00 40kN

1...Ra2 2.fxg4 Rxg4 3.Nf5 Bxf5 4.exf5 Qh4 5.Rf2

-+ (-6.73) Depth: 7/9 00:00:00 49kN

1...Ra2 2.fxg4 Rxg4 3.Nf5 Bxf5 4.exf5 Qh4 5.Rf2

-+ (-6.48 --) Depth: 8/12 00:00:00 67kN

1...Ra2 2.fxg4 Rxg4 3.Nf5 Bxf5 4.exf5 Qh4 5.Rf2

-+ (-6.23 --) Depth: 8/14 00:00:00 109kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfc1 Qh4 5.Ra1 Rxa1 6.Rxa1 Qxh3

-+ (-6.39) Depth: 8/14 00:00:00 134kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfc1 Qh4 5.Ra1 Rxa1 6.Rxa1 Qxh3

-+ (-6.39) Depth: 9/14 00:00:00 137kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfc1 Qh4 5.Ra1 Rxa1 6.Rxa1 Qxh3

-+ (-6.39) Depth: 10/18 00:00:00 227kN

1...g3 2.h3

-+ (-6.64 ++) Depth: 11/19 00:00:00 369kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rf2 Qh4 5.Rxg2 Qxh3 6.Rg4 Ra2 7.Rxg8+ Kxg8

-+ (-6.84) Depth: 11/19 00:00:00 377kN

1...g3 2.h3

-+ (-7.09 ++) Depth: 12/26 00:00:00 1154kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.cxd6 cxd6 7.Nf5 Qxh3

-+ (-6.71) Depth: 12/26 00:00:00 1175kN

1...g3 2.h3

-+ (-6.96 ++) Depth: 13/26 00:00:00 2029kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nc8 6.Nf5 Qxh3 7.Rd2 dxc5 8.bxc5 Qh1+ 9.Kf2

-+ (-6.56) Depth: 13/26 00:00:00 2066kN

1...g3 2.h3

-+ (-6.81 ++) Depth: 14/28 00:00:00 3807kN

1...g3 2.h3

-+ (-7.06 ++) Depth: 14/28 00:00:00 3966kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.Qb3 Qxh3 7.Nf5 b6 8.cxd6 cxd6

-+ (-6.80) Depth: 14/28 00:00:00 4016kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.Qb3 Qxh3 7.Nf5 b6 8.cxd6 cxd6

-+ (-6.55 --) Depth: 15/34 00:00:00 6936kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.Qb3 Qxh3 7.Nf5 b6 8.cxd6 cxd6

-+ (-6.30 --) Depth: 15/36 00:00:01 15261kN

1...g3 2.h3

-+ (-7.05 ++) Depth: 15/36 00:00:02 22626kN

1...g3 2.h3

-+ (-7.30 ++) Depth: 15/36 00:00:02 26544kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.Nf5 Qxh3 7.cxd6 cxd6 8.Qb3 b6 9.Rbc1 Qh1+ 10.Kf2

-+ (-7.42) Depth: 15/36 00:00:02 27335kN

1...g3 2.h3

-+ (-7.67 ++) Depth: 16/36 00:00:02 29504kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.c6 bxc6 7.Nxc6 Qxh3 8.Ne7 Qh1+ 9.Kf2 Qh4+ 10.Kg1 Rg5 11.Nf5 Qh1+ 12.Kf2

-+ (-7.47) Depth: 16/36 00:00:02 29766kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.c6 bxc6 7.Nxc6 Qxh3 8.Ne7 Qh1+ 9.Kf2 Qh4+ 10.Kg1 Rg5 11.Nf5 Qh1+ 12.Kf2

-+ (-7.22 --) Depth: 17/40 00:00:03 40826kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.c6 bxc6 7.Nxc6 Qxh3 8.Ne7 Qh1+ 9.Kf2 Qh4+ 10.Kg1 Rg5 11.Nf5 Qh1+ 12.Kf2

-+ (-6.97 --) Depth: 17/40 00:00:04 64726kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.c6 bxc6 7.Nxc6 Qxh3 8.Ne7 Qh1+ 9.Kf2 Qh4+ 10.Kg1 Rg5 11.Nf5 Qh1+ 12.Kf2

-+ (-5.97 --) Depth: 17/43 00:00:05 86180kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 Ra2 7.Ng1 Qh1 8.Ke2 Na4 9.Rb3 b5 10.Re1

-+ (-5.40) Depth: 17/46 00:00:10 157mN

(Prakash, Bhubaneswar 04.01.2012)

3: 1...g3!!

r5rk/1ppb1p1p/1n1p1q2/3Pb3/1PPNPpp1/3Q1P2/2B1N1PP/1R3RK1 b - - 0 1

Analysis by Stockfish 2.2 JA 64bit:

1...Qg7 2.g3 gxf3 3.Rxf3 fxg3 4.hxg3 Bg4 5.Rf2 Nd7

-+ (-1.61) Depth: 7/7 00:00:00 3kN

1...Qg7 2.g3 gxf3 3.Rxf3 fxg3 4.hxg3 Bg4 5.Rf2 Nd7

-+ (-1.61) Depth: 8/7 00:00:00 4kN

1...Qg7 2.fxg4 Bxg4 3.Rf2 f3 4.Nxf3 Bxf3 5.Qxf3 Nxc4 6.g3 Nd2 7.Qxf7 Nxb1 8.Bxb1 Qh6 9.Qxc7 Raf8 10.Qxb7 Qe3

-/+ (-1.33) Depth: 9/12 00:00:00 15kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Qxh3 7.cxb6 Qh1+ 8.Kf2 g1B+ 9.Rxg1 Rxg1 10.Nxg1

-+ (-1.57) Depth: 10/18 00:00:00 62kN

1...Qg7 2.fxg4 Bxg4 3.Rf2 Nxc4 4.Qxc4 f3 5.Qd3 fxe2 6.Nxe2 Bxe2 7.Rxe2 Qh6 8.g3 Qh3 9.Rg2 Rg7 10.g4 Qxd3 11.Bxd3 Bd4+ 12.Kf1 Rgg8 13.Ke1

-+ (-2.02) Depth: 11/21 00:00:00 99kN

1...Qg7 2.fxg4 Bxg4 3.Rf2 Nxc4 4.Qxc4 f3 5.Nf5 Bxf5 6.exf5 fxe2 7.Rxe2 Ra3 8.Bb3

-+ (-1.81) Depth: 12/21 00:00:00 135kN

1...Qg7 2.fxg4 Bxg4 3.Rf2 Nxc4 4.Qxc4 f3 5.Qd3 fxe2 6.Nxe2 Bh5 7.g3 Bxe2 8.Rxe2 Bd4+ 9.Kg2 Rab8 10.h3

-+ (-1.77) Depth: 13/22 00:00:00 193kN

1...Qg7 2.g3 Qh6 3.c5 gxf3 4.Rxf3 fxg3 5.hxg3 Nc8 6.Qe3 Qh4 7.Nf5 Bxf5 8.exf5 Ne7 9.Rd1 Qh3 10.cxd6 cxd6 11.Nf4 Bxf4 12.Qxf4

-+ (-1.61) Depth: 14/25 00:00:00 389kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 Bd6 11.Nxd6 Qh4+ 12.Kg1 cxd6 13.Nxf4 Qxf4

-+ (-1.77) Depth: 15/26 00:00:00 527kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 Nd7 6.Nf5 Qxh3 7.Kf2 dxc5 8.Ng1 Qh5 9.Ke1 cxb4 10.Rxb4 Qh2 11.Kd2 Nc5 12.Qc4

-+ (-1.77) Depth: 16/29 00:00:00 627kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1Q+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Rg8 17.Rb8

-+ (-3.11) Depth: 17/32 00:00:00 1224kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1Q+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nh6 Bg7 21.Nf5 Nxf5 22.exf5 Qxc6

-+ (-2.42) Depth: 18/40 00:00:00 1600kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nxg3 fxg3 21.Qxg3 Qxc6

-+ (-2.58) Depth: 19/41 00:00:00 1806kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Nh5 17.Kf1 Ng3+ 18.Nxg3 fxg3 19.Qxg3 Rg8 20.Qf2

-+ (-2.58) Depth: 20/41 00:00:00 2034kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nxg3 fxg3 21.Qxg3 Qxc6

-+ (-2.42) Depth: 21/45 00:00:00 2831kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nxg3 fxg3 21.Qxg3 Qf1+

-+ (-2.58) Depth: 22/45 00:00:00 3549kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qh2+ 16.Qf2 Qh3 17.Qg1 Nh5 18.Bb3

-+ (-3.07) Depth: 23/45 00:00:01 5858kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nh6 Bg7 21.Nf5 Nxf5 22.exf5 Qd4

-+ (-3.51) Depth: 24/47 00:00:01 11302kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nh6 Bg7 21.Nf5 Nxf5 22.exf5 Qd4

-+ (-3.51) Depth: 25/48 00:00:02 17735kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Qf1 Bc3+ 15.Ke2 Qc5 16.Qg2 Qc4+ 17.Kd1 Rd8+ 18.Kc1 Nh5 19.Rb3 Ng3 20.Nh6 Bg7 21.Nf5 Nxf5 22.exf5 Qd4

-+ (-3.59 ++) Depth: 26/48 00:00:03 24319kN

1...g3 2.h3 Bxh3 3.Nf5 Bxf5 4.exf5 Qh6 5.Rfe1 Ra3 6.Rb3 Qh2+ 7.Kf1 Ra2 8.Ng1 Rxc2 9.Qxc2 Bd4

-+ (-3.67 ++) Depth: 26/48 00:00:06 38632kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1B+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+ 13.Nxg1 Qxg1+ 14.Kd2 Qf2+ 15.Kc1 h5 16.Rb5 Ra1+ 17.Bb1 Qe1+ 18.Kc2 Kh7 19.Qd2 Qg1 20.Qd1 Qf2+ 21.Kc1 Ra5

-+ (-3.51) Depth: 26/48 00:00:07 46036kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.c5 dxc5 6.bxc5 Nd7 7.c6 bxc6 8.dxc6 Nf6 9.Nf5 Qxh3 10.Kf2 g1Q+ 11.Rxg1 Qh2+ 12.Ke1 Rxg1+

-+ (-3.59 ++) Depth: 27/48 00:00:09 61269kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1B+ 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Qxf1+ 11.Kxf1 Nxc4 12.Rd1 Bc3 13.Ke2 Ne5

-+ (-3.43 --) Depth: 27/48 00:00:10 69662kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1B+ 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Qh2 11.Qf2 Bc3+ 12.Ke2 Qxf2+ 13.Kxf2 Ra2 14.Rc1 Bxb4 15.Kg1 Bd2 16.Bb3 Rb2 17.Rc2 Rxb3 18.Rxd2 Nxc4 19.Rc2

-+ (-3.31 --) Depth: 27/48 00:00:11 74863kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 Qh2 7.Rg1

-+ (-3.13 --) Depth: 27/48 00:00:12 81089kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1N 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Bc3+ 11.Ke2 Qh2+ 12.Qf2 Qxf2+ 13.Kxf2 Ra2 14.Rc1 Bxb4 15.Kg1 Ba3 16.Bb3 Bc5+ 17.Kh1 Rf2 18.Rb1 Rxf3 19.Bd1 Rf1+ 20.Kg2 Rg1+ 21.Kf3 Be3 22.Nxe3 fxe3 23.Kxe3 Nxc4+ 24.Kf2 Rh1 25.Ra1 Kg7 26.Ra4 Rxd1 27.Rxc4

-+ (-3.43) Depth: 27/63 00:00:13 91302kN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1N 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Bc3+ 11.Ke2 Qh2+ 12.Qf2 Qxf2+ 13.Kxf2 Ra2 14.Rc1 Bxb4 15.Kg1 Ba3 16.Bb3 Bc5+ 17.Kh1 Rf2 18.Rb1 Rxf3 19.Bd1 Rf2 20.Bh5

-+ (-3.51 ++) Depth: 28/63 00:00:16 109mN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1B+ 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Bc3+ 11.Ke2 Qh2+ 12.Qf2 Qxf2+ 13.Kxf2 Ra2 14.Rc1 Bxb4 15.Kg1 Ba3 16.Bb3 Bc5+ 17.Kh1 Rf2 18.Rb1 Rxf3 19.Bd1 Rf2 20.Bh5

-+ (-3.35 --) Depth: 28/63 00:00:18 120mN

1...g3 2.h3 Bxh3 3.gxh3 g2 4.Rfd1 Qh4 5.Nf5 Qxh3 6.Kf2 g1B+ 7.Rxg1 Qh2+ 8.Ke1 Rxg1+ 9.Nxg1 Qxg1+ 10.Qf1 Bc3+ 11.Ke2 Qh2+ 12.Qf2 Qxf2+ 13.Kxf2 Ra2 14.Rc1 Bxb4 15.Kg1 Ba3 16.Bb3 Bc5+ 17.Kh1 Rf2 18.Rc3 h5 19.Nh4 Kg7 20.Rc2 Rxc2 21.Bxc2 Nxc4 22.Nf5+ Kf6 23.Kg2 b5 24.Bd3 Ne5

-+ (-3.55) Depth: 28/63 00:00:20 141mN

(Prakash, Bhubaneswar 04.01.2012)