the hardest position I know

[Rubinus]

Novou partii
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 1

Analysis by LCzero v0.8-id237:

1.Dd5 Vxe6
+- (1.54) Hloubka: 7 00:00:00 0kN
1.Dd5 Vxe6
+- (1.54) Hloubka: 7 00:00:00 0kN
1.Dd5 Vxe6 2.Sc4 Jxc4
+/= (0.70) Hloubka: 8 00:00:00 0kN
1.Dd5 Vxe6 2.Sc4 Jxc4
+/= (0.69) Hloubka: 9 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 Jf3+ 3.Kf2
+/= (0.58) Hloubka: 9 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 Jf3+ 3.Kf2
+/= (0.45) Hloubka: 10 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Sc4 Kf7 4.Sb3
+/= (0.44) Hloubka: 11 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Sc4 Kf7 4.Sb3 Vd8
= (-0.01) Hloubka: 12 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Sc4 Jxc4 4.Dxc4 Kf7 5.Vd1
= (0.04) Hloubka: 13 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Sc4 Jxc4 4.Dxc4 Kf7 5.Vd1 Vd8
= (0.17) Hloubka: 13 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+/= (0.26) Hloubka: 13 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+- (1.78) Hloubka: 14 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+- (1.93) Hloubka: 14 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+- (1.93) Hloubka: 14 00:00:00 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+- (1.43) Hloubka: 15 00:00:01 0kN
1.Dd5 Vxe6 2.Sb5 De7 3.Da8+ Kf7 4.Dxh8 Dc5+ 5.Kh1 Dxb5 6.Df8#
+/- (1.28) Hloubka: 16 00:00:01 0kN
1.Dd5 Vxe6 2.Sb5 Dc8 3.Sa6 Dc5+ 4.Dxc5 bxc5 5.Sc8 Kf7 6.Sxe6+ Kxe6 7.Se3 Vc8 8.Vd1 Jc4
+/- (0.94) Hloubka: 16 00:00:01 0kN
1.Dd5 Vxe6 2.Sb5 Dc8 3.Sa6 Dc5+ 4.Dxc5 bxc5 5.Sc8 Kf7 6.Sxe6+ Kxe6 7.Se3 Vb8 8.b3 c4 9.b4 Vd8 10.Sxa7
+/= (0.69) Hloubka: 16 00:00:02 1kN
1.Dd5 Vxe6 2.Sb5 Dc8 3.Sa6 Dc5+ 4.Dxc5 bxc5 5.Sc8 Kf7 6.Sxe6+ Kxe6 7.Se3 Vb8 8.b3 c4 9.b4 Vd8 10.Sxa7
+/= (0.46) Hloubka: 17 00:00:03 1kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Df2 Dc6 6.Da7+ Ve7 7.Dd4 Vhe8 8.a4 Vd7 9.Sb5 Vxd4 10.Sxc6
= (0.02) Hloubka: 18 00:00:07 2kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Df2 Dc6 6.Da7+ Ve7 7.Dd4 Vhe8 8.a4 Vd7 9.Sb5 Vxd4 10.Sxc6
= (0.02) Hloubka: 18 00:00:07 2kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Df2 Dc6 6.Da7+ Ve7 7.Dd4 Vhe8 8.a4 Vd7 9.Sb5 Vxd4 10.Sxc6
= (0.00) Hloubka: 19 00:00:08 2kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Dd4 De7 6.Sc4 Jxc4 7.Dxc4 Vd8 8.e5 f5 9.Sf4 Da7+ 10.Vf2 Vd1+
= (-0.10) Hloubka: 19 00:00:12 4kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Dd4 De7 6.Sc4 Jxc4 7.Dxc4 Vd8 8.e5 f5 9.Sf4 Da7+ 10.Vf2 Vd1+
= (-0.10) Hloubka: 19 00:00:12 4kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Dd4 De7 6.Sc4 Jxc4 7.Dxc4 Vd8 8.e5 f5 9.Sf4 Da7+ 10.Vf2 Vd1+
= (-0.11) Hloubka: 19 00:00:12 4kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Dd4 De7 6.Sc4 Jxc4 7.Dxc4 Vd8 8.e5 f5 9.Sf4 Da7+ 10.Vf2 Vd1+
= (-0.11) Hloubka: 19 00:00:13 4kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Vf1 Ve6 5.Df2 Dc6 6.Sd1 Vhe8 7.Sb3 Dxe4 8.h3 g5 9.Sxg5 Vg8 10.Sxe6+ Kxe6 11.Dxf6+
= (-0.13) Hloubka: 19 00:00:13 4kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.a5 Vd7 9.Db3 Vxd1+ 10.Sxd1 Dc5+ 11.Kg2 Dc6 12.Db4 Vd6 13.Sb3+
= (-0.05) Hloubka: 21 00:00:28 8kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.a5 Vd7 9.Db3 Vxd1+ 10.Sxd1 Dc5+ 11.Kg2 Dc6 12.Db4 Vd6 13.Sb3+
= (-0.03) Hloubka: 21 00:00:32 9kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.a5 Vd7 9.Db3 Vxd1+ 10.Sxd1 Dc5+ 11.Kg2 Dc6 12.Db4 Vd6 13.Sb3+
= (-0.04) Hloubka: 21 00:00:35 11kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.a5 Vd7 9.Db3 Vxd1+ 10.Sxd1 Dc5+ 11.Kg2 Dc6 12.Db4 Vd6 13.Sb3+
= (-0.04) Hloubka: 21 00:00:35 11kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.a5 Vd7 9.Db3 Vxd1+ 10.Sxd1 Dc5+ 11.Kg2 Dc6 12.Db4 Vd6 13.Sb3+
= (-0.04) Hloubka: 21 00:00:36 11kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 V8e7 8.Dd8 Ve8 9.Dxc8 Vxc8 10.Sf4 Jc4 11.Vd7+ Ve7 12.Vxe7+ Kxe7 13.b3 Ja5 14.b4 Jc4
= (-0.02) Hloubka: 21 00:00:37 11kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Dd4 Dc8 5.Dd5+ Ve6 6.Vd1 Vhe8 7.a4 Db8 8.b4 Dc7 9.a5 Dxc3 10.a6 Dxb4 11.Se3 Kg7 12.a7 Da3 13.Kf2 V6e7
= (0.11) Hloubka: 22 00:01:02 18kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vxe4 9.Dd5+ Ke8 10.Dc6+ Kf7 11.Dd5+ Ke8 12.h3 Vxg4+ 13.hxg4 De3+ 14.Vf2 Jf4 15.Db5+ Ke7 16.Db7+ Kd6 17.Df3 Ve8 18.Dxe3
= (0.12) Hloubka: 22 00:01:03 19kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vxe4 9.Dd5+ Ke8 10.Dc6+ Kf7 11.Dd5+ Ke8 12.h3 Vxg4+ 13.hxg4 De3+ 14.Vf2 Jf4 15.Db5+ Ke7 16.Db7+ Kd6 17.Df3 Ve8 18.Dxe3 Vxe3
= (0.14) Hloubka: 22 00:01:04 20kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vxe4 9.Dd5+ Ke8 10.Dc6+ Kf7 11.Dd5+ Ke8 12.h3 Vxg4+ 13.hxg4 De3+ 14.Vf2 Jf4 15.Dc6+ Ke7 16.Dc7+ Ke6 17.Dc6+ Ke7 18.Dc7+ Ke6 19.Dc6+ Kf7
= (0.14) Hloubka: 22 00:01:04 20kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vxe4 9.Dd5+ Ke8 10.Dc6+ Kf7 11.Dd5+ Ke8 12.h3 Vxg4+ 13.hxg4 De3+ 14.Vf2 Jf4 15.Db5+ Ke7 16.Db7+ Kd6 17.Df3 Dxf3 18.Vxf3 Ve8 19.Sg7
= (0.14) Hloubka: 22 00:01:04 20kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Dc8+ Kf7 11.Dc4+ Ke8 12.a4 Da7+ 13.Kh1 Db7 14.Vd1 Vxd1+ 15.Sxd1 Ke7 16.Sb3 Kd8 17.Dd4+ Kc8
= (0.23) Hloubka: 23 00:01:23 29kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
= (0.24) Hloubka: 23 00:01:28 31kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
= (0.24) Hloubka: 23 00:01:28 31kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
= (0.25) Hloubka: 23 00:01:30 31kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
+/= (0.26) Hloubka: 23 00:01:30 31kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
+/= (0.26) Hloubka: 23 00:01:31 31kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.Da4+ Kf7 11.Db3+ Ke8 12.Db8+ Kf7 13.Db3+ Ke8 14.Db5+ Kf7 15.Dc4+ Ke8 16.Db5+ Kf7 17.Dc4+
+/= (0.27) Hloubka: 23 00:01:32 32kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.b4 Da7+ 11.Dc5 Dxc5+ 12.bxc5 Va6 13.Sg7 Vg8 14.Sxf6 Jf4 15.e5 Vxa2 16.Sf3 Kf7 17.c6 Ke6 18.Sg4+ Kd5 19.Sf3+ Ke6 20.Vd1 g4 21.Se4 Jh3+ 22.Kf1 Vf2+
+/= (0.28) Hloubka: 23 00:01:36 33kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Vd6 9.Dc4+ Ke8 10.b4 Da7+ 11.Dc5 Dxc5+ 12.bxc5 Va6 13.Sg7 Vg8 14.Sxf6 Jf4 15.e5 Vxa2 16.Sf3 Kd7 17.c6+ Kc7 18.e6 Jh3+ 19.Kh1 Jf2+ 20.Kg1 Jh3+ 21.Kh1 Jf2+ 22.Kg1 Jh3+
+/= (0.30) Hloubka: 23 00:01:43 35kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 Db5 8.Vf5 Db6 9.e5 Vd8 10.Dxb6 Vxb6 11.b3 Vd2 12.Sxg5 Vxa2 13.b4 Vba6 14.Sxf6 Ke6 15.Sg4 Kd5 16.Sf3+ Ke6 17.Sg4 Kd5 18.e6+ Kxe6 19.Sd4 Ke7 20.b5 Ve6 21.Vf1 Ve4 22.Sf3 Vf4 23.b6 Vb2
+/= (0.38) Hloubka: 24 00:03:07 61kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Je5 9.Sh5+ Jg6 10.Sg4 Je5 11.Sh5+ Jg6
= (0.24) Hloubka: 25 00:04:25 123kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Je5 9.Sh5+ Jg6 10.Sg4 Je5 11.Sh5+ Jg6
= (0.24) Hloubka: 25 00:04:27 123kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Je5 9.Sh5+ Jg6 10.Sg4 Je5 11.Sh5+ Jg6
= (0.24) Hloubka: 25 00:04:30 125kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Je5 9.Sh5+ Jg6 10.Sg4 Je5 11.Sh5+ Jg6
= (0.23) Hloubka: 25 00:04:30 125kN
1.Da3 Vxe6 2.Dxa7 Ve7 3.Dxb6 Kf7 4.Sd1 g5 5.Sh5+ Jg6 6.Vf1 Ve6 7.Dd4 De7 8.Sg4 Je5 9.Sh5+ Jg6 10.Sg4 Je5 11.Sh5+ Jg6
= (0.23) Hloubka: 25 00:05:06 141kN


Standart engines probably needed depth cca 60.... (1.Qxe5 fe5 2.Rf1...)
[D]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 1

[reflectionofpower]

[D]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 1

My human instinct is to play Qd5. This threatens mate and Rxe6 is forced. Qxe6 is a complete loss with Qd8+. It's outcome is a draw unless you were a human someone makes an error.

[Eelco de Groot]

Hello Pavel,

I don't quite understand what you want to point out with the analysis. Because I don't see the Queen sacrifice and it is not likely to be found with just depth 25?

Here is some Kaissa output after giving it the first few moves. With backward analysis it should now be easy but from the root position I have not tried very hard, but could not find Qxe5 after twenty minutes or so, one thread.

1. Qxe5 fxe5 2. Rf1

[D]4q1kr/p6p/1pr1P1pB/4p3/4P3/2P5/PP2B2P/5RK1 b - -

Engine: Kaissa III (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

48 73:52 +3.10 2...Rc5 3.Bd1 b5 4.Bb3 Rc4 5.a4 a6
6.Rf3 Qe7 7.Kg2 g5 8.Rf5 Qg7 9.Bxg7 Kxg7
10.Bxc4 bxc4 11.Kf2 Rb8 12.Ke3 Rxb2
13.e7 Rb8 14.Rxe5 Kf7 15.Rxg5 Rb6 (10.741.029.373) 2423

48 73:52 +3.47 2...Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 a5
6.Kg2 Re8 7.Rf6 Rb8 8.Kg3 Ra8 9.Rf1 Re8
10.Kg4 Rc8 11.Kg5 Rb8 12.Kf6 Rf8+
13.Bxf8 Kxf8 14.b4 a4 15.Ra1 Ke8 (10.741.029.373) 2423

48 73:52 +3.85 2...Qe7 3.Bd1 Rc4 4.Bb3 b5 5.Kg2 Qe8
6.Kg3 Qe7 7.a4 a6 8.Kg2 Qe8 9.Rf3 Qe7
10.Ba2 g5 11.b4 Qg7 12.Bxg7 Kxg7
13.Bxc4 bxc4 14.Rf5 Re8 15.Rxe5 Kf6 (10.741.029.373) 2423

48 73:52 +3.88 2...Rc7 3.Bb5 Qe7 4.Ba4 b5 5.Bb3 Rc4
6.Kg2 Qe8 7.Kg3 Qe7 8.a4 a6 9.Kg2 g5
10.axb5 axb5 11.h4 Qg7 12.Bxg7 Kxg7
13.Bxc4 bxc4 14.hxg5 h6 15.Rf7+ Kg6 (10.741.029.373) 2423
___________________________________________________________

50 87:15 +3.67 2...Rc8 3.Bd1 Qxe6 4.Bb3 Qxb3 5.axb3 a5
6.Kg2 Re8 7.Rf6 Rb8 8.Kg3 Rd8 9.Kg4 Ra8
10.Rf1 Rc8 11.Kg5 Rd8 12.Kf6 Rf8+
13.Bxf8 Kxf8 14.b4 a4 15.Ra1 Ke8 (12.714.139.879) 2428

50 87:15 +3.79 2...Rc7 3.Bb5 Qe7 4.Ba4 b5 5.Bb3 Rc4
6.Kg2 Qe8 7.a4 a6 8.Rf3 Qe7 9.Ba2 g5
10.Rf5 Qg7 11.Bxg7 Kxg7 12.Bxc4 bxc4
13.Kf3 Re8 14.Rxe5 Kf6 15.Rf5+ Kg6 (12.714.139.879) 2428

50 87:15 +3.80 2...Qe7 3.Bd1 Rc4 4.Bb3 b5 5.Kg2 Qe8
6.a4 a6 7.Rf3 Qe7 8.Ba2 g5 9.Rf5 Qg7
10.Bxg7 Kxg7 11.Bxc4 bxc4 12.Kf3 Re8
13.Rxe5 Kf6 14.Rf5+ Kg6 15.Rc5 Rb8 (12.714.139.879) 2428

50 87:15 +3.80 2...Rc5 3.Bd1 b5 4.Bb3 Rc4 5.Rf2 Qe7
6.a4 a6 7.Kg2 Qe8 8.Rf3 Qe7 9.Ba2 g5
10.Rf5 Qg7 11.Bxg7 Kxg7 12.Bxc4 bxc4
13.Kf3 Re8 14.Rxe5 Kf6 15.Rf5+ Kg6 (12.714.139.879) 2428
____________________________________________________________

51 106:31 +3.80 2...Rc8 3.Bd1 b5 4.Bb3 Rc4 5.Rf2 Qe7
6.a4 a6 7.Kg2 Qe8 8.Rf3 Qe7 9.Ba2 g5
10.Rf5 Qg7 11.Bxg7 Kxg7 12.Bxc4 bxc4
13.Kf3 Re8 14.Rxe5 Kf6 15.Rf5+ Kg6 (15.595.827.683) 2440

51 106:31 +3.80 2...Rc7 3.Bb5 Qe7 4.Ba4 b5 5.Bb3 Rc4
6.Kg2 Qe8 7.a4 a6 8.Rf3 Qe7 9.Ba2 g5
10.Rf5 Qg7 11.Bxg7 Kxg7 12.Bxc4 bxc4
13.Kf3 Re8 14.Rxe5 Kf6 15.Rf5+ Kg6 (15.595.827.683) 2440

51 106:31 +3.81 2...Qe7 3.Bd1 Rc4 4.Bb3 b5 5.Kg2 Qe8
6.a4 a6 7.Rf3 Qe7 8.Ba2 g5 9.b4 Qg7
10.Bxg7 Kxg7 11.Bxc4 bxc4 12.Rf5 Re8
13.Rxe5 Kf6 14.Rf5+ Kg6 15.Rc5 Rxe6 (15.595.827.683) 2440

51 106:31 +4.44 2...Rc5 3.Bd1 b5 4.Bb3 Rc4 5.a4 a6
6.Rf2 Qe7 7.Kg2 Qg7 8.Bxg7 Kxg7
9.Bxc4 bxc4 10.Rf7+ Kh6 11.e7 Re8
12.Kg3 g5 13.Rf6+ Kg7 14.Rxa6 Rxe7
15.Kg4 Rf7 (15.595.827.683) 2440



http://www.talkchess.com/forum/viewtopi ... t&start=10

http://www.chessgames.com/perl/chessgam ... 6#reply142

(FAQ: To search on a position in Talkchess, you have to check for all the FEN parts: "Search for all terms")

[tpoppins]

Novou partii
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 1

The correct FEN is [d]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 24

This is Y. Gusev -- E. Auerbach, Chelyabinsk 1946. Extensively discussed here in the past. My latest post linking to (nearly) exhaustive analysis proving a White win in all critical lines is here (thank you, Eelco).

My human instinct is to play Qd5. This threatens mate and Rxe6 is forced. Qxe6 is a complete loss with Qd8+. It's outcome is a draw unless you were a human someone makes an error.

Your instinct is wrong. Neither is 24...Rxe6 forced, 24...Rc5 is the simplest. Admittedly, a power move like 24.Qxe5 is far from easy to spot.

[reflectionofpower]

Novou partii
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 1

The correct FEN is [d]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 0 24

My human instinct is to play Qd5. This threatens mate and Rxe6 is forced. Qxe6 is a complete loss with Qd8+. It's outcome is a draw unless you were a human someone makes an error.

Your instinct is wrong. Neither is 24...Rxe6 forced, 24...Rc5 is the simplest. Admittedly, a power move like 24.Qxe5 is far from easy to spot.

Rc5?? loses to Qb7 and it's mate in 10

[tpoppins]

Sorry, Lonnie, you are right. That's what comes of posting straight out of bed. ;)

[reflectionofpower]

Sorry, Lonnie, you are right. That's what comes of posting straight out of bed.

When I start playing chess in the morning it takes me a bit to start rolling too.