Interesting Test Position

MMoisan · Post by **MMoisan** » Sun Jan 24, 2016 9:46 pm

This position comes from the analysis provided by Chessbase of the game Carlsen-Tomashevsky, Tata Steel 2016 (http://en.chessbase.com/post/tata-steel ... a-and-ding ):

8
7
6
5
4
3
2
1
	a	b	c	d	e	f	g	h

r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 19

IM Sagar Shah proposes 19. Rxd2! here, which is corroborated by my Stockfish 7 at depth 43 (+0.93). However Houdini 3 tactical found that 19.Qxd2! leads the a larger advantage (+2.10) after a three hours think. Can someone confirm that 19. Qxd2! is indeed the best here?

Vinvin · Post by **Vinvin** » Sun Jan 24, 2016 10:35 pm

Please post the 2 main lines !

zullil · Post by **zullil** » Sun Jan 24, 2016 10:49 pm

MMoisan wrote:This position comes from the analysis provided by Chessbase of the game Carlsen-Tomashevsky, Tata Steel 2016 (http://en.chessbase.com/post/tata-steel ... a-and-ding ):

8
7
6
5
4
3
2
1
a b c d e f g h

r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 19

IM Sagar Shah proposes 19. Rxd2! here, which is corroborated by my Stockfish 7 at depth 43 (+0.93). However Houdini 3 tactical found that 19.Qxd2! leads the a larger advantage (+2.10) after a three hours think. Can someone confirm that 19. Qxd2! is indeed the best here?

A quick search with the latest Stockfish:

Code: Select all

info depth 40 seldepth 80 multipv 1 score cp 244 nodes 34075489993 nps 27592629 hashfull 999 tbhits 0 time 1234949 pv e5g4 f8c8 e2d2 g8f8 f6f7 f8f7 d1f1 f7e8 d2g5 b7a6 g5h5 e8d7 g4e5 d7c7 f1f7 c7b8 f7d7 d6d7 e5d7 b8b7 h5f7 c8c7 f7e6 a6b5 d7e5 a8c8 e6d5 b5c6 e5c6 c7c6 d4c5 b6c5 g2g4 g7g6 h3h4 b7c7 d5e5 c7b7 b2b3 a7a6 a2a4 c8d8 g1g2 d8d6 h4h5 g6h5 g4h5 d6e6 e5d5 e6d6 d5c4 b7c7 g2g3 c7d8 g3h4 d8e7 a4a5 e7e8 h4g4 d6f6 c4g8 e8e7 g8d5 e7e8 d5e5 e8f7 g4g5 f6e6

info depth 40 seldepth 80 multipv 2 score cp 63 nodes 34075489993 nps 27592629 hashfull 999 tbhits 0 time 1234949 pv d1d2 d6d8 f6f4 d8g5 f4g4 g5h6 d4c5 b6c5 e2f2 d5d4 c3d4 a8d8 g4h4 h6g5 f2f7 f8f7 h4h8 g8h8 e5f7 h8g8 f7g5 d8d4 d2d4 c5d4 g5e6 d4d3 g1f2 b7d5 e6g5 d5g2 f2e3 g7g6 e3d3 g8g7 h3h4 g7h6 g5f7 h6h5 f7e5 g2f1 d3e3 f1b5 e3f4 b5e8 f4g3 g6g5 h4g5 h5g5 g3f3 g5f5 e5d3 e8c6 f3e3 f5e6 e3d4 e6d6 d3e5 c6e8

Eelco de Groot · Post by **Eelco de Groot** » Sun Jan 24, 2016 11:19 pm

Right, Ne5-g4! I would play that without thinking

But the grandmasters these days, what are they relying on? Not their intuition, not Houdini apparently, and Stockfish also does not play that for a while I think. Rainbow Serpent has Rxd2 as its first move at the moment. But as Louis shows, Ne5-g4 is much better. Does Stockfish's line transpose with the Houdini Qd2? What about Komodo here.

r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - -

Engine: Rainbow Serpent Sf20151218_008 MOD MP (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

27 5:33 +0.51 1.Rxd2 Qd8 2.Rf4 Qg5 3.Rg4 Qh6
4.dxc5 bxc5 5.Qf2 d4 6.cxd4 Rad8
7.Rh4 Qg5 8.Qxf7+ Rxf7 9.Rh8+ Kxh8
10.Nxf7+ Kg8 11.Nxg5 Rxd4 12.Rxd4 cxd4
13.Nxe6 d3 14.Kf2 (1.000.111.442) 2997

27 5:33 +0.48 1.Rf4 f6 2.Ng6 cxd4 3.cxd4 Rfe8
4.Qh5 e5 5.dxe5 Rxe5 6.Nxe5 Qxe5
7.Qxe5 fxe5 8.Rf5 Re8 9.Rxd2 d4
10.g4 Re7 11.Rd1 Be4 12.Rff1 Bd5
13.b3 Bb7 14.Rfe1 (1.000.111.442) 2997

27 5:33 0.00 1.Qh5 gxf6 2.Qg4+ Kh8 3.Qh4+ Kg7
4.Qg3+ Kh7 5.Qh4+ Kg7 (1.000.111.442) 2997

27 5:33 0.00 1.Rdf1 Ba6 2.Qh5 Bxf1 3.Nxf7 Rxf7
4.Qxf7+ Kh8 5.Qh5+ Kg8 6.Qf7+ (1.000.111.442) 2997

27 5:33 0.00 1.Qg4 cxd4 2.Qh5 gxf6 3.Qg4+ Kh7
4.Qh4+ Kg7 5.Qg3+ Kh7 6.Qh4+ (1.000.111.442) 2997

27 5:33 0.00 1.Qxd2 cxd4 2.cxd4 Ba6 3.Qf2 Qe7
4.Ng4 Rac8 5.Nh6+ Kh7 6.Ng4 Kg8 (1.000.111.442) 2997

[Event "Tata Steel Masters"] 
[Site "Wijk aan Zee"] 
[Date "2016.01.22"] 
[Round "6.1"] 
[White "Carlsen, Magnus"] 
[Black "Tomashevsky, Evgeny"] 
[Result "1-0"] 
[BlackElo "2728"] 
[WhiteElo "2844"] 
[LiveChessVersion "1.4.8-SNAPSHOT"] 
[ECO "A46"] 
 
1. d4 {[%clk 1:40:14]} Nf6 {[%clk 1:40:51]} 2. Nf3 {[%clk 1:40:33]} e6 
{[%clk 1:41:04]} 3. Bf4 {[%clk 1:40:54]} b6 {[%clk 1:40:33]} 4. e3 
{[%clk 1:41:13]} Bb7 {[%clk 1:40:40]} 5. h3 {[%clk 1:40:39]} Be7 {[%clk 1:37:35]} 
6. Bd3 {[%clk 1:40:07]} O-O {[%clk 1:35:08]} 7. O-O {[%clk 1:39:52]} c5 
{[%clk 1:34:54]} 8. c3 {[%clk 1:39:51]} Nc6 {[%clk 1:29:47]} 9. Nbd2 
{[%clk 1:37:55]} d5 {[%clk 1:20:36]} 10. Qe2 {[%clk 1:33:53]} Bd6 
{[%clk 1:05:45]} 11. Rfe1 {[%clk 1:33:23]} Ne7 {[%clk 0:44:37]} 12. Rad1 
{[%clk 1:28:50]} Ng6 {[%clk 0:42:56]} 13. Bxg6 {[%clk 1:22:53]} hxg6 
{[%clk 0:42:16]} 14. Bxd6 {[%clk 1:23:15]} Qxd6 {[%clk 0:42:36]} 15. Ne5 
{[%clk 1:23:40]} g5 {[%clk 0:35:48]} 16. f4 {[%clk 1:18:28]} gxf4 
{[%clk 0:32:11]} 17. Rf1 {[%clk 1:18:43]} Nd7 {[%clk 0:25:27]} 18. Qh5 
{[%clk 1:14:40]} Nf6 {[%clk 0:13:59]} 19. Qh4 {[%clk 1:11:42]} Qd8 
{[%clk 0:11:05]} 20. Rxf4 {[%clk 1:09:46]} Ne4 {[%clk 0:11:30]} 21. Nxe4 
{[%clk 1:07:56]} Qxh4 {[%clk 0:09:07]} 22. Rxh4 {[%clk 1:08:24]} dxe4 
{[%clk 0:08:37]} 23. dxc5 {[%clk 1:08:52]} bxc5 {[%clk 0:07:24]} 24. Rd7 
{[%clk 1:09:19]} Rab8 {[%clk 0:06:11]} 25. b3 {[%clk 1:09:34]} a5 
{[%clk 0:02:46]} 26. Rc7 {[%clk 1:09:50]} a4 {[%clk 0:02:39]} 27. bxa4 
{[%clk 1:07:48]} Ba8 {[%clk 0:02:16]} 28. a5 {[%clk 1:06:08]} Rb7 
{[%clk 0:00:49]} 29. Rxc5 {[%clk 1:06:23]} Ra7 {[%clk 0:00:35]} 30. Nc4 
{[%clk 1:05:15]} 1-0

Vinvin · Post by **Vinvin** » Sun Jan 24, 2016 11:26 pm

After some learning to show Qxd2 is not that bad :

Code: Select all

FEN: r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 19

Stockfish_16012415_x64_modern:

 38/71	16:47	 9.899.311k	9.823k	+0,52	19.Qxd2 Ba6 20.Ng4 Qe7 21.Qf2 Rac8 22.Nh6+ Kh7 23.Rxf7 Rxf7 24.Nxf7 Qf6 25.Ne5 Qxf2+ 26.Kxf2 cxd4 27.Rxd4 Rf8+ 28.Kg3 Bb5 29.Rf4 Rf6 30.h4 Kg8 31.Kf3 Kf8 32.g4 Rxf4+ 33.Kxf4 Ke7 34.g5 Be2 35.Nc6+ Kd6 36.Nxa7 e5+ 37.Ke3 Bg4 38.a4 g6 39.Nb5+ Kc5 40.Na3 Bd7 41.b4+ Kd6 42.h5 gxh5 43.g6 Be6 44.a5 bxa5 45.bxa5 Kc6
 39/71	16:47	 9.899.311k	9.823k	+1,08	19.Rxd2 Qd8 20.Rf4 Qg5 21.Rg4 Qh6 22.dxc5 bxc5 23.Qf2 f6 24.Ng6 Rf7 25.Re2 f5 26.Ne5 Rf6 27.Rh4 Qc1+ 28.Re1 Qg5 29.Nd7 Bc6 30.Nxf6+ Qxf6 31.Rf4 c4 32.Rf3 a5 33.Rfe3 Bd7 34.Qf4 a4 35.Qd6 Rd8 36.R3e2 Bc8 37.Qc5 Bd7 38.Qc7 Bc8 39.Rf2 Bd7 40.Rff1 Bc8 41.Re5 Rf8 42.Kh2 Qg5 43.Rf2 Qf6 44.g4 Rd8 45.gxf5 exf5

MMoisan · Post by **MMoisan** » Sun Jan 24, 2016 11:34 pm

Vinvin wrote:Please post the 2 main lines !

Hi Vincent,

Unfounately I didn't keep Stockfish analysis. Here is Houdini 3 Tactical at depth 25:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:

19.Dg4 
  =/+  (-0.47 ++)   Profondeur: 7/18   00:00:00  9kN
19.Dg4 
  =/+  (-0.32 ++)   Profondeur: 7/18   00:00:00  9kN
19.Txd2 cxd4 20.Txd4 Dd8 21.Tf1 f6 22.Cg6 e5 23.Th4 
  =  (-0.21)   Profondeur: 7/19   00:00:00  23kN
19.Txd2 De7 20.Tf4 Dg5 21.Tg4 Df5 22.Td1 cxd4 23.cxd4 Tac8 24.Tf1 
  =  (-0.27)   Profondeur: 8/21   00:00:00  73kN
19.Txd2 Dd8 20.Tf4 cxd4 21.Tfxd4 Dg5 22.Tg4 Df5 23.Td1 Fa6 24.c4 dxc4 25.Cxc4 
  =  (-0.28)   Profondeur: 9/21   00:00:00  102kN
19.Txd2 
  =  (-0.20 ++)   Profondeur: 10/23   00:00:00  129kN
19.Txd2 Dd8 20.Tf4 Dg5 21.Tg4 Df5 22.dxc5 bxc5 23.b3 Fa6 24.c4 d4 
  =  (-0.25)   Profondeur: 10/25   00:00:00  145kN
19.Dh5 
  =  (-0.06 ++)   Profondeur: 10/30   00:00:01  593kN
19.Dh5 Dc7 20.Txd2 gxf6 21.Dg4+ Rh7 22.Dh4+ Rg7 23.Dg3+ Rh7 24.Dh4+ Rg7 
  =  (0.00)   Profondeur: 10/30   00:00:01  627kN
19.Dh5 Dc7 20.Txd2 gxf6 21.Dg4+ Rh7 22.Dh4+ Rg7 23.Dg3+ Rh7 24.Dh4+ Rg7 
  =  (0.00)   Profondeur: 11/33   00:00:01  1258kN
19.Dh5 Dc7 20.Txd2 gxf6 21.Dg4+ Rh7 22.Dh4+ Rg7 23.Dg3+ Rh7 24.Dh4+ Rg7 
  =  (0.00)   Profondeur: 12/34   00:00:01  1543kN
19.Txd2 
  =  (0.07 ++)   Profondeur: 12/39   00:00:01  3205kN
19.Txd2 Dd8 
  =  (-0.07 --)   Profondeur: 12/39   00:00:01  3396kN
19.Dh5 Dc7 20.Txd2 gxf6 21.Dg4+ Rh7 22.Dh4+ Rg7 23.Dg3+ Rh7 24.Dh4+ Rg7 
  =  (0.00)   Profondeur: 12/39   00:00:01  3396kN
19.Dh5 gxf6 20.Dg4+ Rh8 21.Dh4+ Rg7 22.Dg3+ Rh7 23.Dh4+ Rg8 24.Dg3+ Rh7 25.Dh4+ 
  =  (0.00)   Profondeur: 13/39   00:00:02  4574kN
19.Dh5 gxf6 20.Dg4+ Rh8 21.Dh4+ Rg7 22.Dg3+ Rh7 23.Dh4+ Rg8 24.Dg3+ Rh7 25.Dh4+ 
  =  (0.00)   Profondeur: 14/39   00:00:02  6626kN
19.Txd2 
  =  (0.07 ++)   Profondeur: 14/39   00:00:03  8907kN
19.Txd2 Dd8 20.Tf4 Dg5 21.Tg4 Dh6 22.dxc5 bxc5 23.Df2 Tad8 24.b3 f6 25.Cd3 Tc8 26.Cf4 Tc6 27.Te2 f5 28.Tg6 
  =  (0.00)   Profondeur: 14/39   00:00:03  8955kN
19.Txd2 Fa6 20.Dg4 cxd4 21.cxd4 Tac8 22.Tdf2 Tc1+ 23.Rh2 Tf1 24.Txf1 Fxf1 25.Dh5 gxf6 26.Dg4+ Rh7 27.Dh5+ Rg7 28.Dg4+ Rh6 29.Dh4+ Rg7 30.Dg4+ Rh6 
  =  (0.00)   Profondeur: 15/42   00:00:03  13443kN
19.Txd2 Fa6 20.Dg4 cxd4 21.cxd4 Tac8 22.Tdf2 Tc1+ 23.Rh2 Tf1 24.Txf1 Fxf1 25.Dh5 gxf6 26.Dg4+ Rh7 27.Dh5+ Rg7 28.Dg4+ Rh6 29.Dh4+ Rg7 30.Dg4+ Rh6 
  =  (0.00)   Profondeur: 16/45   00:00:04  18167kN
19.Txd2 
  =  (0.07 ++)   Profondeur: 17/51   00:00:13  67596kN
19.Txd2 De7 20.Tf4 Dg5 21.Tg4 Dh6 22.dxc5 bxc5 23.Df2 Tad8 24.b3 d4 25.cxd4 Td5 26.Th4 Dg5 27.Tg4 Dh6 28.Th4 
  =  (0.00)   Profondeur: 17/51   00:00:15  76648kN
19.Txd2 De7 20.Tf4 Dg5 21.Tg4 Dh6 22.dxc5 bxc5 23.Df2 Tad8 24.b3 d4 25.cxd4 Td5 26.Th4 Dg5 27.Tg4 Dh6 28.Th4 
  =  (0.00)   Profondeur: 18/56   00:00:21  106mN
19.Cg4 
  =  (0.07 ++)   Profondeur: 18/57   00:02:04  645mN
19.Cg4 
  =  (0.22 ++)   Profondeur: 18/57   00:02:07  664mN
19.Cg4 Tfc8 20.Dxd2 Rf8 21.Tf2 Tc7 22.Dg5 Rg8 23.dxc5 Dd8 24.Cf6+ Rf8 25.Ch7+ Rg8 26.Cf6+ Rf8 
  =  (0.00)   Profondeur: 18/57   00:02:08  666mN
19.Cg4 
  =  (0.07 ++)   Profondeur: 18/57   00:02:08  667mN
19.Cg4 
  =  (0.22 ++)   Profondeur: 18/57   00:02:08  667mN
19.Cg4 Tfc8 20.Dxd2 Rf8 21.Tf2 cxd4 22.cxd4 f5 23.Dg5 De7 24.Dh5 Rg8 25.Ce5 Fc6 26.Cg6 Df6 27.Dh8+ Rf7 28.Ce5+ Dxe5 29.Dxc8 Txc8 30.dxe5 Fa4 31.b3 Fe8 32.a4 Re7 
  =  (0.18)   Profondeur: 18/57   00:02:08  669mN
19.Cg4 Tfc8 20.Dxd2 Rf8 21.Tf2 cxd4 22.cxd4 f5 23.Dg5 De7 24.Dh5 Rg8 25.Ce5 Fc6 26.Cg6 Df6 27.Dh8+ Rf7 28.Ce5+ Dxe5 29.Dxc8 Txc8 30.dxe5 Fa4 31.b3 Fe8 32.a4 Re7 
  =  (0.21)   Profondeur: 18/57   00:02:10  677mN
19.Cg4 
  =  (0.29 ++)   Profondeur: 18/57   00:02:17  712mN
19.Cg4 Tfc8 20.Dxd2 Rf8 21.Tf2 cxd4 22.cxd4 Dd8 23.Ce5 Tc7 24.Df4 f5 25.Cf3 Tc6 26.Cg5 De8 27.Te1 Dg6 28.h4 Rg8 29.De5 Tac8 30.Cxe6 Tc2 31.Tfe2 Txe2 32.Txe2 Tc1+ 33.Te1 Txe1+ 34.Dxe1 
  =  (0.19)   Profondeur: 18/57   00:02:18  718mN
19.Cg4 
  =  (0.26 ++)   Profondeur: 19/57   00:02:37  816mN
19.Cg4 Tfe8 20.Dxd2 Rf8 21.Tf3 f5 22.Ce5 Rg8 23.Tg3 Te7 24.Dh6 Tc7 25.Tf1 Tf8 26.a3 Fa6 27.Te1 f4 28.Tg6 Tf6 29.Txg7+ Txg7 30.Dxf6 cxd4 31.cxd4 
  =  (0.28)   Profondeur: 19/57   00:02:45  857mN
19.Cg4 
  +/=  (0.35 ++)   Profondeur: 20/57   00:03:25  1068mN
19.Cg4 
  +/=  (0.50 ++)   Profondeur: 20/57   00:03:37  1126mN
19.Cg4 
  +/-  (0.91 ++)   Profondeur: 20/66   00:04:43  1466mN
19.Cg4 De7 20.Ch6+ gxh6 21.Dg4+ Rh7 22.Dh4 Dxf6 23.Dxf6 cxd4 24.cxd4 Tac8 25.Txd2 Tc7 26.Td3 Tg8 27.Tc3 Td7 28.Rf2 Fa6 29.g4 Tc8 30.Txc8 Fxc8 31.Re3 Fa6 32.De5 Fb7 33.b3 a5 34.Rf4 Fa6 
  +/-  (1.29)   Profondeur: 20/71   00:05:57  1852mN
19.Cg4 
  +/-  (1.40 ++)   Profondeur: 21/71   00:06:55  2156mN
19.Cg4 Tfc8 20.Dxd2 Tc7 21.Tdf1 Fa6 22.Dg5 Fxf1 23.Ch6+ Rf8 24.Cf5 Dd8 25.Dxg7+ Re8 26.dxc5 exf5 27.Dg8+ Rd7 28.Td6+ Re7 29.Dg5+ Re8 30.Txd8+ Txd8 31.cxb6 axb6 32.Rxf1 d4 33.cxd4 Txd4 34.De3+ Te4 35.Dxb6 Tcc4 36.Rf2 Rf8 37.Dh6+ Re8 38.Rf3 Tc2 39.Db6 Re7 40.Db5 
  +/-  (1.51)   Profondeur: 21/71   00:07:51  2445mN
19.Cg4 Tfc8 
  +/-  (1.40 --)   Profondeur: 22/71   00:09:14  2903mN
19.Cg4 Tfc8 20.Dxd2 Tc7 21.Tdf1 Fa6 22.Dg5 Fxf1 23.Ch6+ Rf8 24.Cf5 Dd8 25.Dxg7+ Re8 26.dxc5 exf5 27.Dg8+ Rd7 28.Td6+ Re7 29.Dg5+ Re8 30.Txd8+ Txd8 31.cxb6 axb6 32.Rxf1 d4 33.cxd4 Txd4 34.De3+ Te4 35.Dxb6 Tcc4 36.Rf2 Rf8 37.Dh6+ Re7 38.Dd2 Ted4 39.De2+ Te4 40.Dd3 Ted4 41.De3+ Rf6 42.Rf3 Te4 43.Dh6+ Re7 44.Dg5+ Re6 45.Dd2 Tcd4 46.Dc3 Tc4 47.Dd3 Tcd4 48.Da6+ Td6 49.Dc8+ Rf6 50.Dc3+ Re7 
  +/-  (1.44)   Profondeur: 22/71   00:14:11  4509mN
19.Cg4 
  +/-  (1.56 ++)   Profondeur: 23/71   00:18:06  5771mN
19.Cg4 
  +-  (1.78 ++)   Profondeur: 23/71   00:20:37  6563mN
19.Cg4 Tfc8 20.Dxd2 Tc7 21.Tdf1 Fa6 22.Dg5 Fxf1 23.Ch6+ Rf8 24.Cf5 Dd8 25.Dxg7+ Re8 26.Dg8+ Rd7 27.Dxf7+ Rc8 28.Dxe6+ Rb8 29.Rxf1 cxd4 30.Cxd4 Dd7 31.Dxd7 Txd7 32.g4 Rb7 33.g5 Th7 34.Rg2 Tg8 35.Ce6 Rc8 36.Rg3 Te7 37.g6 Rd7 38.Cf4 Te5 39.Rg4 Tg7 40.Tf7+ Te7 41.Tf5 
  +-  (1.79)   Profondeur: 23/73   00:23:09  7365mN
19.Cg4 Tfc8 
  +-  (1.68 --)   Profondeur: 24/73   00:25:58  8314mN
19.Dxd2 
  +-  (1.91 ++)   Profondeur: 24/78   02:46:49  54064mN
19.Dxd2 Fa6 20.Cg4 Tfc8 21.Dg5 Rf8 22.Tf2 Tc7 23.Dg6 cxd4 24.cxd4 Dg3 25.Dh7 Tac8 26.Dh8+ Re7 27.Dxg7 Rd6 28.Tf3 Dh4 29.De5+ Rc6 30.Txf7 Rb7 31.Dxe6 Dg5 32.Txc7+ Txc7 33.De5 Dd8 34.Cf6 Te7 35.Dxd5+ Dxd5 36.Cxd5 Te2 37.b3 Txa2 38.h4 Ta5 39.Cb4 Tb5 40.Cxa6 Rxa6 41.Rf2 Rb7 42.Tb1 
  +-  (2.10)   Profondeur: 24/78   02:59:19  58082mN
19.Dxd2 
  +-  (2.21 ++)   Profondeur: 25/87   03:47:44  74345mN
19.Dxd2 Fa6 20.Cg4 Tfc8 21.Dg5 Rf8 22.Tf2 Tc7 23.Dg6 cxd4 24.cxd4 Dg3 25.Dh7 Tac8 26.Dh8+ Re7 27.Dxg7 Rd6 28.Tf3 Dh4 29.De5+ Rc6 30.Txf7 Rb7 31.Dxe6 Dg5 32.Txc7+ Txc7 33.De5 Dd8 34.Ce3 Td7 35.Tc1 Fd3 36.h4 Fe4 37.h5 Df8 38.a4 Dh6 39.Tc3 Df8 40.a5 
  +-  (2.30)   Profondeur: 25/87   04:14:14  82840mN

Vinvin · Post by **Vinvin** » Sun Jan 24, 2016 11:55 pm

MMoisan wrote:

Vinvin wrote:Please post the 2 main lines !

Hi Vincent,

Unfounately I didn't keep Stockfish analysis. Here is Houdini 3 Tactical at depth 25:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:
...
19.Dxd2 Fa6 20.Cg4 Tfc8 21.Dg5 Rf8 22.Tf2 Tc7 23.Dg6 cxd4 24.cxd4 Dg3 25.Dh7 Tac8 26.Dh8+ Re7 27.Dxg7 Rd6 28.Tf3 Dh4 29.De5+ Rc6 30.Txf7 Rb7 31.Dxe6 Dg5 32.Txc7+ Txc7 33.De5 Dd8 34.Ce3 Td7 35.Tc1 Fd3 36.h4 Fe4 37.h5 Df8 38.a4 Dh6 39.Tc3 Df8 40.a5 
  +-  (2.30)   Profondeur: 25/87   04:14:14  82840mN

SF thinks 20... Rfc8 is a mistake and prefers ...Qe7

Code: Select all

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

Stockfish_16012415_x64_modern:

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

 33/61	08:46	 5.486.502k	10.422k	+2,62	2. ... Rfb8 3.Qg5 Kf8 4.Rf2 Rb7 5.Qg6 cxd4 6.cxd4 Rc8 7.Qh7 Ke8 8.Qxg7 Kd8 9.Ne5 f5 10.Qg8+ Kc7 11.Rc2+ Bc4 12.Qg3 Kb8 13.b3 b5 14.Qf4 Rcc7 15.bxc4 dxc4 16.h4 b4 17.Re1 c3 18.Kf2 Rh7 19.g3 a5 20.Nc6+ Kc7 21.Qxd6+ Kxd6 22.Nxa5 Ra7 23.Re5 Kd7
 33/61	08:46	 5.486.502k	10.422k	+2,43	2. ... Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qc7 8.dxc5 bxc5 9.Re1 Bd3 10.Rxf6 Bxg6 11.Rxg6 Re8 12.Rexe6 Rxe6 13.Rxe6 Qf7 14.Qxd5 Rf8 15.Qe5 Qf5 16.Qxf5 Rxf5 17.b3 Rd5 18.Ra6 Rd7 19.c4 Kf7 20.Kh2 Ke7 21.Rc6 Rd2
 34/61	08:46	 5.486.502k	10.422k	+1,36	2. ... Qe7 3.Qf2 Rac8 4.Qh4 Be2 5.Nh6+ gxh6 6.Rd2 Bh5 7.Rdf2 Kg7 8.dxc5 Rfe8 9.Qxh5 Qxf6 10.Rxf6 Kxf6 11.Qxh6+ Ke7 12.cxb6 axb6 13.Qg5+ Kf8 14.h4 e5 15.Qh6+ Kg8 16.Qd2 Kg7 17.Qxd5 Rcd8 18.Qe4 Rd1+ 19.Kh2 Rd6 20.b4 Ree6 21.a4 Rd2 22.Kg3 Ra2 23.b5 Ra3 24.Qc4 Ra1 25.Kf2 e4 26.Ke3 Re1+ 27.Kd2 Rb1 28.Qd4+ Kg6 29.g4

The best way to arbitrate between 2 engines is to test line from engine1 on engine2 and line from engine2 on engine1.

MMoisan · Post by **MMoisan** » Mon Jan 25, 2016 12:20 am

Vinvin wrote:

MMoisan wrote:

Vinvin wrote:Please post the 2 main lines !

Hi Vincent,

Unfounately I didn't keep Stockfish analysis. Here is Houdini 3 Tactical at depth 25:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:
...
19.Dxd2 Fa6 20.Cg4 Tfc8 21.Dg5 Rf8 22.Tf2 Tc7 23.Dg6 cxd4 24.cxd4 Dg3 25.Dh7 Tac8 26.Dh8+ Re7 27.Dxg7 Rd6 28.Tf3 Dh4 29.De5+ Rc6 30.Txf7 Rb7 31.Dxe6 Dg5 32.Txc7+ Txc7 33.De5 Dd8 34.Ce3 Td7 35.Tc1 Fd3 36.h4 Fe4 37.h5 Df8 38.a4 Dh6 39.Tc3 Df8 40.a5 
  +-  (2.30)   Profondeur: 25/87   04:14:14  82840mN

SF thinks 20... Rfc8 is a mistake and prefers ...Qe7

Code: Select all

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

Stockfish_16012415_x64_modern:

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

 33/61	08:46	 5.486.502k	10.422k	+2,62	2. ... Rfb8 3.Qg5 Kf8 4.Rf2 Rb7 5.Qg6 cxd4 6.cxd4 Rc8 7.Qh7 Ke8 8.Qxg7 Kd8 9.Ne5 f5 10.Qg8+ Kc7 11.Rc2+ Bc4 12.Qg3 Kb8 13.b3 b5 14.Qf4 Rcc7 15.bxc4 dxc4 16.h4 b4 17.Re1 c3 18.Kf2 Rh7 19.g3 a5 20.Nc6+ Kc7 21.Qxd6+ Kxd6 22.Nxa5 Ra7 23.Re5 Kd7
 33/61	08:46	 5.486.502k	10.422k	+2,43	2. ... Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qc7 8.dxc5 bxc5 9.Re1 Bd3 10.Rxf6 Bxg6 11.Rxg6 Re8 12.Rexe6 Rxe6 13.Rxe6 Qf7 14.Qxd5 Rf8 15.Qe5 Qf5 16.Qxf5 Rxf5 17.b3 Rd5 18.Ra6 Rd7 19.c4 Kf7 20.Kh2 Ke7 21.Rc6 Rd2
 34/61	08:46	 5.486.502k	10.422k	+1,36	2. ... Qe7 3.Qf2 Rac8 4.Qh4 Be2 5.Nh6+ gxh6 6.Rd2 Bh5 7.Rdf2 Kg7 8.dxc5 Rfe8 9.Qxh5 Qxf6 10.Rxf6 Kxf6 11.Qxh6+ Ke7 12.cxb6 axb6 13.Qg5+ Kf8 14.h4 e5 15.Qh6+ Kg8 16.Qd2 Kg7 17.Qxd5 Rcd8 18.Qe4 Rd1+ 19.Kh2 Rd6 20.b4 Ree6 21.a4 Rd2 22.Kg3 Ra2 23.b5 Ra3 24.Qc4 Ra1 25.Kf2 e4 26.Ke3 Re1+ 27.Kd2 Rb1 28.Qd4+ Kg6 29.g4

The best way to arbitrate between 2 engines is to test line from engine1 on engine2 and line from engine2 on engine1.

It seems that Houdini found a win after 20...Qe7:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/p3qpp1/bp2pR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:

...

21.Te1 Tfc8 22.Te5 Rf8 23.Th5 Dxf6 24.Cxf6 gxf6 25.dxc5 Re7 26.cxb6 axb6 27.Th6 Tc6 28.Dd4 e5 29.Dxd5 Fb7 30.Th7 Tf8 31.h4 Fa8 32.Db3 Td6 33.h5 Fd5 34.c4 Fe6 35.Db4 Tfd8 36.Rh2 Ff5 37.Tg7 Th8 38.g4 Fe6 39.Rg3 f5 40.Dc3 fxg4 41.Dxe5 Td3+ 42.Rg2 
  +-  (3.40)   Profondeur: 23/70   00:09:36  2952mN

[/code]

Vinvin · Post by **Vinvin** » Mon Jan 25, 2016 12:56 am

MMoisan wrote:

Vinvin wrote:

MMoisan wrote:

Vinvin wrote:Please post the 2 main lines !

Hi Vincent,

Unfounately I didn't keep Stockfish analysis. Here is Houdini 3 Tactical at depth 25:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:
...
19.Dxd2 Fa6 20.Cg4 Tfc8 21.Dg5 Rf8 22.Tf2 Tc7 23.Dg6 cxd4 24.cxd4 Dg3 25.Dh7 Tac8 26.Dh8+ Re7 27.Dxg7 Rd6 28.Tf3 Dh4 29.De5+ Rc6 30.Txf7 Rb7 31.Dxe6 Dg5 32.Txc7+ Txc7 33.De5 Dd8 34.Ce3 Td7 35.Tc1 Fd3 36.h4 Fe4 37.h5 Df8 38.a4 Dh6 39.Tc3 Df8 40.a5 
  +-  (2.30)   Profondeur: 25/87   04:14:14  82840mN

SF thinks 20... Rfc8 is a mistake and prefers ...Qe7

Code: Select all

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

Stockfish_16012415_x64_modern:

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

 33/61	08:46	 5.486.502k	10.422k	+2,62	2. ... Rfb8 3.Qg5 Kf8 4.Rf2 Rb7 5.Qg6 cxd4 6.cxd4 Rc8 7.Qh7 Ke8 8.Qxg7 Kd8 9.Ne5 f5 10.Qg8+ Kc7 11.Rc2+ Bc4 12.Qg3 Kb8 13.b3 b5 14.Qf4 Rcc7 15.bxc4 dxc4 16.h4 b4 17.Re1 c3 18.Kf2 Rh7 19.g3 a5 20.Nc6+ Kc7 21.Qxd6+ Kxd6 22.Nxa5 Ra7 23.Re5 Kd7
 33/61	08:46	 5.486.502k	10.422k	+2,43	2. ... Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qc7 8.dxc5 bxc5 9.Re1 Bd3 10.Rxf6 Bxg6 11.Rxg6 Re8 12.Rexe6 Rxe6 13.Rxe6 Qf7 14.Qxd5 Rf8 15.Qe5 Qf5 16.Qxf5 Rxf5 17.b3 Rd5 18.Ra6 Rd7 19.c4 Kf7 20.Kh2 Ke7 21.Rc6 Rd2
 34/61	08:46	 5.486.502k	10.422k	+1,36	2. ... Qe7 3.Qf2 Rac8 4.Qh4 Be2 5.Nh6+ gxh6 6.Rd2 Bh5 7.Rdf2 Kg7 8.dxc5 Rfe8 9.Qxh5 Qxf6 10.Rxf6 Kxf6 11.Qxh6+ Ke7 12.cxb6 axb6 13.Qg5+ Kf8 14.h4 e5 15.Qh6+ Kg8 16.Qd2 Kg7 17.Qxd5 Rcd8 18.Qe4 Rd1+ 19.Kh2 Rd6 20.b4 Ree6 21.a4 Rd2 22.Kg3 Ra2 23.b5 Ra3 24.Qc4 Ra1 25.Kf2 e4 26.Ke3 Re1+ 27.Kd2 Rb1 28.Qd4+ Kg6 29.g4

The best way to arbitrate between 2 engines is to test line from engine1 on engine2 and line from engine2 on engine1.

It seems that Houdini found a win after 20...Qe7:

Code: Select all

1: Carlsen,M - Tomashevsky,E, 78th Tata Steel GpA 2016
r4rk1/p3qpp1/bp2pR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 w - - 0 1

Analysis by Houdini 3 x64:

...

21.Te1 Tfc8 22.Te5 Rf8 23.Th5 Dxf6 24.Cxf6 gxf6 25.dxc5 Re7 26.cxb6 axb6 27.Th6 Tc6 28.Dd4 e5 29.Dxd5 Fb7 30.Th7 Tf8 31.h4 Fa8 32.Db3 Td6 33.h5 Fd5 34.c4 Fe6 35.Db4 Tfd8 36.Rh2 Ff5 37.Tg7 Th8 38.g4 Fe6 39.Rg3 f5 40.Dc3 fxg4 41.Dxe5 Td3+ 42.Rg2 
  +-  (3.40)   Profondeur: 23/70   00:09:36  2952mN

Yes, I forgot SF run in background and here's the result after 1 hours : it dropped Qe7 too !

Code: Select all

FEN: r4rk1/p4pp1/bp1qpR2/2pp4/3P2N1/2P4P/PP1Q2P1/3R2K1 b - - 2 2

Stockfish_16012415_x64_modern:
...
 35/68	28:18	 17.621.193k	10.375k	+3,06	2. ... Rae8 3.Qg5 Qe7 4.Rd2 e5 5.dxe5 Bc8 6.Nh6+ Kh7 7.Qh4 Qxf6 8.exf6 gxh6 9.Qa4 Be6 10.Qxa7 Rb8 11.Qc7 Rfc8 12.Qf4 Rg8 13.Re2 Rbc8 14.g4 Rg6 15.Rxe6 fxe6 16.Qd6 Rgg8 17.Qxe6 Rcf8 18.Qxb6 d4 19.Qc7+ Kg6 20.Qxc5 dxc3 21.Qf5+ Kf7 22.Qh7+ Kxf6 23.Qxh6+ Kf7 24.bxc3
 35/68	28:18	 17.621.193k	10.375k	+2,35	2. ... Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qc7 8.dxc5 bxc5 9.Re1 Bd3 10.Rxf6 Bxg6 11.Rxg6 Re8 12.Rexe6 Rxe6 13.Rxe6 Qf7 14.Qxd5 Rf8 15.Qe5 Qf1+ 16.Kh2 Qf5 17.Qxf5 Rxf5 18.Ra6 c4 19.Rxa7 Rb5 20.Rc7 Rxb2 21.a4 Ra2 22.Rxc4 Kf7 23.Kg3 g5 24.Kf3
 35/68	28:18	 17.621.193k	10.375k	+1,39	2. ... Qe7 3.Qf2 Bb5 4.dxc5 bxc5 5.Qh4 Be2 6.Nh6+ gxh6 7.Rd2 Bh5 8.Rdf2 Kg7 9.Rg6+ Bxg6 10.Qxe7 c4 11.g4 Rh8 12.Re2 Rhe8 13.Qc7 Rec8 14.Qe5+ Kh7 15.Rf2 Rg8 16.Kh2 Rg7 17.Rf6 h5 18.Rf4 Rag8 19.b3 cxb3 20.axb3 hxg4 21.Rxg4 Bf5 22.Rh4+ Kg6 23.Qf4 f6 24.Rh6+ Kf7 25.Qc7+ Ke8 26.Qc6+ Ke7 27.Qc5+ Ke8
---------------------------------------------------------------------------
 36/68	45:08	 28.235.517k	10.424k	+3,41	2. ... Rac8 3.Qg5 Qe7 4.Rd2 Rc7 5.Qh5 gxf6 6.Qh6 f5 7.Nf6+ Qxf6 8.Qxf6 Rfc8 9.g4 fxg4 10.hxg4 Kf8 11.dxc5 Ke8 12.cxb6 axb6 13.Rh2 Bd3 14.Rh8+ Kd7 15.Qxf7+ Kd6 16.Qf4+ Kc6 17.Rh6 Re8 18.Qe5 Rce7 19.g5 Be4 20.c4 Kd7 21.a4 Rf7 22.Qd4 Rg8 23.Qxb6 Rxg5+ 24.Kh2 Rg6 25.Rxg6 Bxg6 26.cxd5 Rf6 27.Qc6+ Ke7
 36/68	45:08	 28.235.517k	10.424k	+3,14	2. ... Rae8 3.Qg5 Qe7 4.Rd2 e5 5.dxe5 Bc8 6.Nh6+ Kh7 7.Qh4 Qxf6 8.exf6 gxh6 9.Qa4 Be6 10.Qxa7 Rb8 11.Re2 Kg6 12.Qc7 Rg8 13.Qg3+ Kh7 14.Qf4 Kg6 15.a3 Kh7 16.Kh2 Kg6 17.g4 Rbd8 18.Rd2 Rd7 19.Rf2 Kh7 20.Re2 d4 21.cxd4 cxd4 22.Qe4+ Kh8 23.Qd3 Re8 24.Kg3 Kg8
 36/68	45:08	 28.235.517k	10.424k	+2,75	2. ... Rfc8 3.Qg5 Kf8 4.Rf2 Rc7 5.Qg6 cxd4 6.cxd4 Rb8 7.Qh7 Ke8 8.Qxg7 Kd7 9.Rxf7+ Kc8 10.Nf6 Bb5 11.Re1 Qd8 12.Rxc7+ Qxc7 13.Qxc7+ Kxc7 14.Rxe6 Rh8 15.Nxd5+ Kd7 16.Rg6 Bc4 17.Rg7+ Kc6 18.Nc3 Rf8 19.Rxa7 Rf1+ 20.Kh2 Rf2 21.b3 Rc2 22.bxc4 Rxc3 23.Ra4 Rd3 24.d5+ Kc5 25.a3 Rd2
---------------------------------------------------------------------------
 37/70	54:26	 34.070.890k	10.432k	+3,41	2. ... Rfb8 3.Qg5 Qe7 4.Rd2 Rb7 5.Rdf2 cxd4 6.Nh6+ Kf8 7.Rxf7+ Qxf7 8.Rxf7+ Rxf7 9.Nxf7 Kxf7 10.Qf4+ Kg6 11.Qxd4 Rf8 12.Qg4+ Kh7 13.Qh4+ Kg8 14.Qe7 Bc4 15.b3 Bd3 16.Qxe6+ Kh7 17.Qxd5 Bg6 18.Qd4 Rf6 19.Qh4+ Kg8 20.Qc4+ Kh7 21.Qa4 Rf7 22.Qh4+ Kg8 23.Kh2 Rf6 24.Kg3 Be8 25.Qc4+ Kh7 26.Qd3+ Bg6 27.Qd4 Be8 28.Qe4+ Rg6+ 29.Kf4 Bc6 30.Qf5
 37/70	54:26	 34.070.890k	10.432k	+3,36	2. ... Rac8 3.Qg5 Qe7 4.Rd2 Rc7 5.Qh5 gxf6 6.Qh6 f5 7.Nf6+ Qxf6 8.Qxf6 Rfc8 9.g4 fxg4 10.hxg4 Kf8 11.dxc5 Ke8 12.cxb6 axb6 13.Rh2 Bd3 14.Rh8+ Kd7 15.Qxf7+ Kd6 16.Qf4+ Kc6 17.Rh6 Re8 18.Qe5 Rce7 19.g5 Be4 20.a4 Kb7 21.c4 Rg8 22.Kh2 Rge8 23.Kg3 Rg8 24.cxd5 Bxd5 25.g6 Rc7
 37/70	54:26	 34.070.890k	10.432k	+3,04	2. ... Rfc8 3.Qg5 Qe7 4.Rd2 Kf8 5.Qh5 Ke8 6.Rf3 g6 7.Qh6 f5 8.Ne5 Rc7 9.Qxg6+ Kd8 10.dxc5 Qe8 11.Rg3 Qxg6 12.Rxg6 Bb7 13.c6 Bc8 14.c4 Rh7 15.cxd5 exd5 16.Rxd5+ Kc7 17.Nd3 Ba6 18.Nf4 Rc8 19.Rxf5 Kb8 20.Kf2 Re7 21.Kg3 Re3+ 22.Kh2 Bc4 23.b3 Bd3 24.Nxd3 Rxd3 25.Rf7 Rd2 26.Kg3 Rxa2
---------------------------------------------------------------------------
 37/77	59:34	 37.174.767k	10.400k	+3,36	2. ... Rac8 3.Qg5
 38/77	59:34	 37.174.767k	10.400k	+3,42	2. ... Rfb8 3.Qg5 Qe7 4.Rd2 Kf8 5.Qh5 Qxf6 6.Nxf6 gxf6 7.Qh4 Ke7 8.Rf2 Rf8 9.Qxf6+ Kd7 10.Qg7 Ke8 11.dxc5 bxc5 12.h4 Rd8 13.Qg3 d4 14.Qc7 Rd7 15.Qxc5 d3 16.Qg5 Rd5 17.Qe3 Rd7 18.Rd2 Rh8 19.Qg5 Kf8 20.Qc5+ Ke8 21.h5 Bb7 22.Qe5 Rh7 23.Kf2 Kf8 24.g4 Ke8 25.Qb8+ Ke7
 38/77	59:34	 37.174.767k	10.400k	+3,29	2. ... Rfc8 3.Qg5 Qe7 4.Rd2 Kf8 5.Qh5 Ke8 6.Rf3 g6 7.Qh6 f5 8.Ne5 Rc7 9.Qxg6+ Kd8 10.dxc5 Qe8 11.Rg3 Qxg6 12.Rxg6 Bb7 13.c6 Bc8 14.c4 Rh7 15.cxd5 exd5 16.Rxd5+ Kc7 17.Nd3 Ba6 18.Nf4 Rc8 19.Rxf5 Bc4 20.b3 Bf7 21.Rgf6 Bg8 22.Rg5 Kb8 23.Kf2 Rf7 24.Rgg6 Rfc7 25.g4 Bh7 26.Nd5 Bxg6 27.Nxc7 Kxc7 28.Rxg6 a5 29.Kg3

zullil · Post by **zullil** » Mon Jan 25, 2016 1:31 am

zullil wrote:
MMoisan wrote:This position comes from the analysis provided by Chessbase of the game Carlsen-Tomashevsky, Tata Steel 2016 (http://en.chessbase.com/post/tata-steel ... a-and-ding ):

8
7
6
5
4
3
2
1
a b c d e f g h

r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 19

IM Sagar Shah proposes 19. Rxd2! here, which is corroborated by my Stockfish 7 at depth 43 (+0.93). However Houdini 3 tactical found that 19.Qxd2! leads the a larger advantage (+2.10) after a three hours think. Can someone confirm that 19. Qxd2! is indeed the best here?
A quick search with the latest Stockfish:
Code: Select all
info depth 40 seldepth 80 multipv 1 score cp 244 nodes 34075489993 nps 27592629 hashfull 999 tbhits 0 time 1234949 pv e5g4 f8c8 e2d2 g8f8 f6f7 f8f7 d1f1 f7e8 d2g5 b7a6 g5h5 e8d7 g4e5 d7c7 f1f7 c7b8 f7d7 d6d7 e5d7 b8b7 h5f7 c8c7 f7e6 a6b5 d7e5 a8c8 e6d5 b5c6 e5c6 c7c6 d4c5 b6c5 g2g4 g7g6 h3h4 b7c7 d5e5 c7b7 b2b3 a7a6 a2a4 c8d8 g1g2 d8d6 h4h5 g6h5 g4h5 d6e6 e5d5 e6d6 d5c4 b7c7 g2g3 c7d8 g3h4 d8e7 a4a5 e7e8 h4g4 d6f6 c4g8 e8e7 g8d5 e7e8 d5e5 e8f7 g4g5 f6e6

info depth 40 seldepth 80 multipv 2 score cp 63 nodes 34075489993 nps 27592629 hashfull 999 tbhits 0 time 1234949 pv d1d2 d6d8 f6f4 d8g5 f4g4 g5h6 d4c5 b6c5 e2f2 d5d4 c3d4 a8d8 g4h4 h6g5 f2f7 f8f7 h4h8 g8h8 e5f7 h8g8 f7g5 d8d4 d2d4 c5d4 g5e6 d4d3 g1f2 b7d5 e6g5 d5g2 f2e3 g7g6 e3d3 g8g7 h3h4 g7h6 g5f7 h6h5 f7e5 g2f1 d3e3 f1b5 e3f4 b5e8 f4g3 g6g5 h4g5 h5g5 g3f3 g5f5 e5d3 e8c6 f3e3 f5e6 e3d4 e6d6 d3e5 c6e8

Code: Select all

info depth 45 seldepth 87 multipv 1 score cp 317 nodes 301807158343 nps 28815068 hashfull 999 tbhits 0 time 10473935 pv e2d2 b7a6 e5g4 f8c8 d2g5 g8f8 f6f2 c8c7 g5g6 a6b5 d1e1 a8e8 g4e5 f7f6 g6h7 f8e7 h7g7 e7d8 e5f7 c7f7 g7f7 f6f5 f7a7 d6c7 a7c7 d8c7 h3h4 c7d6 f2f3 e8h8 g2g3 b5e8 g1f2 h8g8 b2b4 c5b4 c3b4 g8g4 f3f4 g4g7 g3g4 f5g4 f4f6 g4g3 f2g2 e8f7 e1e5 d6e7 f6f4 g7h7 g2g3 f7g6 a2a4 g6e4 h4h5 h7h8 a4a5 b6a5 b4a5 e7d6

info depth 45 seldepth 87 multipv 2 score cp 252 nodes 301807158343 nps 28815068 hashfull 999 tbhits 0 time 10473935 pv e5g4 f8c8 e2d2 g8f8 f6f7 f8f7 d1f1 f7e8 d2g5 b7a6 g5h5 e8d7 g4e5 d7c7 f1f7 c7b8 f7d7 d6d7 e5d7 b8b7 h5f7 c8c7 f7e6 a6b5 d7e5 c5d4 e6d5 b5c6 d5d4 a8h8 e5c6 b7c6 d4e4 c6b5 a2a4 b5a6 b2b4 c7c3 e4e7 b6b5 e7d6 a6b7 d6d5 b7b8 d5b5 b8c8 b5d5 c8b8 a4a5 c3c7 a5a6 h8f8 d5e5 b8c8 b4b5 c8b8 g1h2 f8c8 e5e6 b8a8 e6d6 c7c5 h3h4 c5c7 d6e5 c7d7 e5f5 d7c7 f5e4 a8b8 e4e5 b8a8

Interesting Test Position

Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position

pgn Re: Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position

Re: Interesting Test Position