Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCEC4

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beram
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Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCEC4

Post by beram » Tue Nov 09, 2010 6:46 pm

[D] r1b1r1k1/1p2qpp1/2p4p/6n1/p3PP1n/7P/1P1NQ1PB/1BRR2K1 b - - 0 31

Only at depth 20, Rybka4 gives the wright positive evaluation for the position to white. Before that it thinks black is slightly better

Position from the last game of the TCEC4 by Martin Thoresen. A ver nice tournament with interesting and best engines with (very) LTC on superfast PC (Fritzmark 39)

This is probably a position difficult to handle for Rybka. It sees relatively late at depth 20 that f4! is better for white. A long time it prefers Rc3 for white to deal with the threat Nxh3 and a3. But white's f4 forcing black to offer a piece, gives him the lead.

What does your engines think

grt Bram

Kurt Utzinger
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Re: Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCE

Post by Kurt Utzinger » Tue Nov 09, 2010 7:40 pm

Correct position before f4 is:

[D]r1b1r1k1/1p2qpp1/2p4p/6n1/p3P2n/7P/1P1NQPPB/1BRR2K1 w - -

zullil
Posts: 5562
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Full name: Louis Zulli

Re: Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCE

Post by zullil » Tue Nov 09, 2010 7:43 pm

Stockfish-1.9.1 (8 threads) thinks that the position after f4 favors White by about half a pawn:

Code: Select all

Searching: r1b1r1k1/1p2qpp1/2p4p/6n1/p3PP1n/7P/1P1NQ1PB/1BRR2K1 b - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     +0.04   00:00     2722 Ne6 f5 
 3     +0.24   00:00     3382 Ne6 Nc4 b5 
 4     +0.36   00:00     5169 Ne6 Nc4 Qc5+ Qe3 Qxe3+ Nxe3 
 5     +0.40   00:00     7885 Ne6 Nc4 Qc5+ Ne3 Nd4 Rxc5 Nxe2+ Kf2 
 6  <  +0.28   00&#58;00     9260 Ne6 Nc4 Qc5+ Ne3 Nd4 Qd2 
 6     +0.20   00&#58;00    12598 Ne6 Nc4 Qc5+ Ne3 Qb6 Qf2 Rd8 Rxd8+ Qxd8 
 7  <  -0.04   00&#58;00    19465 Ne6 Nc4 Qc5+ Ne3 Qb6 Bg3 Nd4 Rxd4 Qxd4 Bxh4 
 7  <  -0.28   00&#58;00    36693 Ne6 Qf2 Rd8 g3 Ng6 Rc4 
 7     -0.28   00&#58;00    42022 Ne6 Qf2 Rd8 Bg3 g5 fxg5 hxg5 Be5 
 8  <  -0.89   00&#58;00    59742 Ne6 Qf2 Rd8 Bg3 g5 Nc4 Rxd1+ Rxd1 Nxf4 Bxh4 
 8     -0.73   00&#58;00    83268 Nh7 Nc4 Rd8 Rxd8+ Qxd8 Rd1 Qe8 Bg3 Nf5 
 9     -0.57   00&#58;00   321061 Nh7 Qf2 Be6 Bg3 g5 f5 Bb3 Nxb3 axb3 Bd3 
10     -0.69   00&#58;00   404404 Nh7 Qf2 Bd7 Bg3 g5 Nc4 Be6 fxg5 hxg5 e5 Bxc4 Rxc4 
                              Ng6 Bxg6 fxg6 
11  <  -0.89   00&#58;00   497223 Nh7 Qf2 Bd7 Bg3 g5 Nc4 Be6 fxg5 hxg5 e5 Bxc4 Rxc4 
                              Ng6 Bxg6 fxg6 Qc2 
11  <  -1.09   00&#58;01   740580 Nh7 Qf2 Bd7 Bg3 g5 Nc4 Be6 fxg5 hxg5 Nd6 Bb3 Rd4 
11     -0.97   00&#58;01   807334 a3 bxa3 Bxh3 gxh3 Nxh3+ Kh1 Ng6 f5 Ngf4 Bxf4 Nxf4 
                              Qg4 Qe5 
12     -0.81   00&#58;01    1287K a3 bxa3 Nxh3+ gxh3 Rxa3 Bd3 Bxh3 Nc4 Qc5+ Ne3 Qd4 
                              e5 Bg4 Bh7+ Kxh7 Qc2+ Bf5 Rxd4 Bxc2 Nxc2 
13  >  -0.48   00&#58;01    1842K a3 bxa3 Nxh3+ gxh3 Rxa3 Bd3 Bxh3 Nc4 Qc5+ Ne3 Qd4 
                              e5 Bg4 Bh7+ Kxh7 Qc2+ Bf5 Rxd4 Bxc2 Nxc2 Nf3+ 
13     -0.57   00&#58;01    1896K a3 bxa3 Nxh3+ gxh3 Rxa3 Bd3 Bxh3 Nc4 Qc5+ Ne3 Qd4 
                              Kh1 Rxe4 Rc4 Rxd3 Rxd4 Rdxd4 Ra1 Rd8 
14  <  -0.89   00&#58;01    2476K a3 bxa3 Nxh3+ gxh3 Rxa3 Qf2 Rxh3 Bg3 Bg4 Rf1 Rd8 
                              Rc3 
14  >  -0.24   00&#58;02    3639K a3 bxa3 Nxh3+ gxh3 Rxa3 Qf2 Rxh3 Bg3 Bg4 Rf1 Rd8 
                              Rc3 b5 e5 b4 Rxc6 Rxd2 Bxh4 Rxf2 Bxe7 Rxf1+ Kxf1 
                              Rh1+ 
14     -0.40   00&#58;02    3790K a3 bxa3 Nxh3+ gxh3 Rxa3 Qf2 Rxh3 Bg3 Bg4 Rf1 Rd8 
                              Rc3 b5 Nb3 b4 Re3 c5 Bd3 Rxd3 Rxd3 c4 Bxh4 Qxh4 
                              Qxh4 Rxh4 
15  <  -0.69   00&#58;02    4796K a3 bxa3 Nxh3+ gxh3 Rxa3 Bd3 Bxh3 Nb1 Ra4 Bg3 Nf5 
                              Qf2 Nxg3 Qxg3 Be6 Nc3 
15     -0.36   00&#58;02    5434K a3 bxa3 Nxh3+ gxh3 Rxa3 e5 Bxh3 Be4 Nf5 Bxf5 Bxf5 
                              Nc4 Qc5+ Qf2 Qxf2+ Kxf2 Ra2+ Kg3 Rea8 Bg1 
16  <  -0.48   00&#58;02    5908K a3 bxa3 Nxh3+ gxh3 Rxa3 e5 Bxh3 Be4 Nf5 Bxf5 Bxf5 
                              Nc4 Qc5+ Kg2 Qb5 Qf2 Rh3 Nd6 
16  >  -0.24   00&#58;02    7048K a3 bxa3 Nxh3+ gxh3 Rxa3 e5 Rxh3 Be4 h5 Qf2 Qd7 f5 
                              Nxf5 Nc4 Qe6 
16  <  -0.61   00&#58;02    7195K a3 bxa3 Nxh3+ gxh3 Rxa3 e5 Rxh3 Be4 h5 Qf2 Qd7 f5 
                              Nxf5 Nc4 Qe6 Bxf5 Qxf5 Qxf5 Bxf5 Nd6 
16     -0.57   00&#58;03    7922K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 h5 Qf2 Qd7 f5 
                              Rd8 e6 fxe6 f6 gxf6 Qxf6 Qg7+ Qxg7+ Kxg7 Be5+ 
17  >  -0.32   00&#58;03   11925K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Qf2 Bg4 
                              Rf1 Rd8 Nc4 Nf3+ Bxf3 Rxf3 
17     -0.24   00&#58;03   12830K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Bg2 Nxg2 
                              Qxg2 Qa3 Ne4 Qe3+ Kh1 Rxh2+ Kxh2 Qxf4+ Kg1 Qe3+ 
                              Kh1 Bh3 Nf6+ Kf8 Nh7+ Kg8 
18     -0.28   00&#58;05   21387K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rc2 Qb4 
                              Nc4 Bd5 Nd6 Nf3+ Bxf3 Bxf3 Qd2 Qb6+ Qd4 Qxd4+ 
                              Rxd4 Ra8 Rdd2 Bd5 Rc1 b6 Nf5 Ra7 Nd6 
19  >  -0.08   00&#58;06   31143K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rc2 Qb4 
                              Nc4 Bd5 Nd6 Nf3+ Bxf3 Bxf3 Qd2 Qb6+ Qd4 Qxd4+ 
                              Rxd4 Ra8 Rdd2 b5 Rc1 b4 Rb2 c5 Kf1 Bc6 
19  <  -0.48   00&#58;07   37022K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Qa7 Rg1 h5 Rg3 Bg4 Nf3 
19     -0.48   00&#58;08   40196K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Rb8 Rg1 Nf5 Rb2 g6 Nf3 Bd5 Rd2 Ne3 Bxd5 Nxd5 
                              Kg2 Nc3 Qf2 
20  >  -0.24   00&#58;09   48458K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Rb8 Rg1 Nf5 Rb2 g6 Nf3 Kg7 Rc2 Qe3 
20     -0.44   00&#58;09   51777K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Rb8 Rg1 Nf5 Rg2 b5 Rbg1 g6 Bxf5 Bxf5 Ne4 Qe3 
                              Nf6+ Kh8 Qxe3 Rxe3 Rc1 b4 Rxc6 b3 
21  >  -0.28   00&#58;11   63299K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Rb8 Rg1 Nf5 Rg2 b5 Rbg1 g6 Bxf5 Bxf5 Ne4 Qe3 
                              Nf6+ Kh8 Qxe3 Rxe3 Rc1 b4 Rxc6 Rc3 
21  >  -0.12   00&#58;13   76384K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Bf5 Kf1 h5 
                              Bg1 Bg4 Qf2 Bxd1 Rxd1 
21     -0.08   00&#58;15   89328K Nxh3+ gxh3 a3 bxa3 Rxa3 Bd3 Qe6 Nc4 Qxh3 Nxa3 Bg4 
                              Qf2 Bxd1 Qg3 Qg4 Qxg4 Bxg4 Bg3 Rd8 Bc4 Nf3+ Kf2 
                              Ra8 Nc2 Nd2 Bd3 Nb3 Rh1 Nc5 Ke3 b5 
22     -0.24   00&#58;19  122393K Nxh3+ gxh3 a3 bxa3 Rxa3 e5 Rxh3 Be4 Be6 Rb1 Qc5+ 
                              Kh1 Rb8 Rg1 Nf5 Rbe1 g6 Bxf5 Bxf5 Ne4 Qd4 Nf6+ 
                              Kg7 Qg2 c5 Rd1 Qe3 Rc1 b5 Nd5 Qd4 Rcd1 Rd3 
23  <  -0.61   00&#58;51  379531K Nxh3+ gxh3 a3 Bg3 axb2 Rc3 Nf5 Nc4 Nxg3 Rxg3 Qh4 
                              Qf2 Qh5 Rdd3 
23     -0.85   01&#58;42  784227K Nxh3+ gxh3 a3 Bg3 axb2 Rc3 Bxh3 Nc4 Red8 Nxb2 Ng6 
                              Nd3 h5 Nf2 h4 Bh2 Be6 Rxd8+ Rxd8 Qb2 Bc8 Kg2 Qf6 
                              Qc1 Rd4 f5 Ne5 Qf4 Rc4 Rxc4 Nxc4 
23     -0.53   01&#58;49  833564K a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Qe7 Ra1 Be6 
                              Bf4 Qb4 Qf2 Red8 Be5 Qe7 
24     -0.57   01&#58;58  902528K a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Qe7 Ra1 Be6 
                              Bf4 Qb4 Qf2 Red8 Be5 Qe7 Qg3 f6 Bf4 g5 Be3 Bb3 
                              Rd2 Kg7 Qf3 Rd7 h4 Rad8 Bb6 Re8 Qf5 Qe6 
25     -0.73   02&#58;39    1227M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Qe7 Bf4 Qb4 
                              Qf2 Be6 Ra1 Red8 Rd2 Rd7 Be5 Qe7 Bc3 Qg5 Bc2 Rdd8 
                              Rxd8+ Rxd8 b3 Ra8 h4 
26  >  -0.53   02&#58;59    1379M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Qe7 Ra1 Be6 
                              Bf4 Qb4 Qf2 Bb3 Rd2 Rad8 Be3 Rd7 Bc5 Qa5 e5 Rd5 
                              Bb6 Qb4 Bc7 c5 Rf1 Rd4 
26     -0.65   03&#58;03    1413M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Qe7 Ra1 Be6 
                              Bf4 Qb4 Qf2 Rad8 Be5 Bb3 Bc3 Qe7 Rd2 b5 Qg3 f6 
                              Be2 Qc5+ Kh1 Qg5 Qxg5 hxg5 Rxd8 Rxd8 Kg1 Re8 Kf2 
                              Rxe4 Kf3 
27  >  -0.48   04&#58;03    1883M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Be6 Bf4 Qf6 e5 
                              Qh4 Be3 Bb3 Rf1 
27     -0.57   04&#58;13    1964M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Be6 Bf4 Qf6 e5 
                              Qe7 Qe4 g6 Ra1 Bb3 Rdc1 Bd5 Qe3 h5 Qf2 Ra4 Rf1 
                              Rb4 Qd2 Rd4 Qe3 Rb4 Rf2 h4 b3 Bxb3 Rfxa2 
28     -0.61   05&#58;13    2432M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Be6 Bf4 Qf6 e5 
                              Qe7 Qe4 g6 Ra1 Bb3 Rdc1 Bd5 Qe3 h5 Qf2 Ra4 Rf1 
                              Rb4 Qd2 Rd4 Qe3 Rb4 Rf2 h4 Rd2 Qe6 
29  <  -0.69   06&#58;10    2899M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Be6 Bf4 Qa5 
                              Ra1 Qb6+ Qf2 Qb4 Rd2 Red8 Be5 f6 Bc3 Qb3 Qg3 Qb6+ 
                              Rf2 Kh8 
29     -0.69   06&#58;56    3259M a3 fxg5 Qxg5 Nf3 Nxf3+ Qxf3 a2 Bd3 Be6 Bf4 Qf6 e5 
                              Qe7 Qe4 g6 Ra1 Bb3 Rdc1 Bd5 Qe3 h5 Qf2 Ra4 Rf1 
                              Rb4 Qd2 Rd4 Qe3 Rb4 Rf2 h4 Qa7 
30  >  -0.57   07&#58;41    3620M a3 fxg5 a2 Bd3 Qxg5 
30  >  -0.44   08&#58;19    3922M a3 bxa3 Nxh3+ 
30     -0.48   10&#58;00    4720M a3 fxg5 a2 Bd3 Qxg5 Nf3 Nxf3+ Qxf3 Be6 Bf4 Qf6 e5 
                              Qh4 Ra1 Red8 Qf2 Qxf2+ Kxf2 Bb3 Rd2 g5 Be3 

Nodes&#58; 5607698555
Nodes/second&#58; 7902975
Best move&#58; a3
Ponder move&#58; fxg5

beram
Posts: 1187
Joined: Wed Jan 06, 2010 2:11 pm

Re: Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCE

Post by beram » Tue Nov 09, 2010 8:22 pm

Correct, Thx Kurt

zullil
Posts: 5562
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Middlegame position - IvanhoeB52aF - DR4 1-0 game 30 TCE

Post by zullil » Tue Nov 09, 2010 9:05 pm

Kurt Utzinger wrote:Correct position before f4 is:

[D]r1b1r1k1/1p2qpp1/2p4p/6n1/p3P2n/7P/1P1NQPPB/1BRR2K1 w - -
Stockfish-1.9.1 (8 threads) MultiPV=3

Code: Select all

info multipv 1 score cp 48 depth 30 time 3961217 nodes 33215675017 nps 8385219 pv f2f4 a4a3 f4g5 e7g5 d2f3 h4f3 e2f3 a3a2 b1d3 c8e6 h2f4 g5f6 e4e5 f6h4 d3c2 e8d8 d1d8 h4d8 c1a1 d8d4 f3f2 d4b4 f4e3 b4b5 e3d4 e6b3 e5e6 b3e6 f2g3 b5g5 g3g5 h6g5 g1f2 a8d8 d4c3
 
info multipv 2 score cp 20 depth 30 time 3961218 nodes 33215675017 nps 8385217 pv g1h1 a4a3 b2a3 a8a3 f2f3 e8d8 e2f2 e7b4 h2c7 d8d7 c7g3 h4g6 f3f4 g5h7 f4f5 g6f8 g3e5 h7g5 h3h4 g5h7 f2f4 f7f6 e5b8 d7d4 f4f2 c6c5 d2f3 d4d1 c1d1 f8d7 b8d6 g8h8 e4e5 a3a1
 
info multipv 3 score cp 0 depth 30 time 3961218 nodes 33215675017 nps 8385217 pv c1c3 e8d8 f2f4 g5e6 f4f5 e6g5 c3e3 a4a3 b2a3 a8a3 b1d3 b7b6 d2b1 a3b3 b1d2 b3c3 d2b1 c3b3 

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