The Most Important Novelty of Informant 105, testposition?

beachknight · Post by **beachknight** » Sat Jan 09, 2010 11:59 pm

4&#58; 2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2
2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2P3/1NN1BP2/PPPQ3P/2KR1B1R w k - 0 1

Analysis by Fruit 2.2.1&#58;

1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Rb8 6.Bxa6 Qc6 7.Qd3 Bg4 8.Rdg1 Bf3 9.Na5 Qd7 
  +/=  &#40;0.62&#41;   Depth&#58; 17/47   00&#58;02&#58;17  132mN
1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Ra8 6.Kb1 Be7 7.Qe2 0-0 8.Bxa6 Qc6 9.Bd3 Rfb8 10.c3 
  +/=  &#40;0.60&#41;   Depth&#58; 18/50   00&#58;04&#58;28  259mN
1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Ra8 6.Kb1 Be7 7.Qe2 0-0 8.Bxa6 Qc6 9.Bd3 Rfb8 10.Rhf1 Be6 
  +/=  &#40;0.64&#41;   Depth&#58; 19/50   00&#58;09&#58;04  526mN
1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Be7 6.Bxa6 Ra8 7.Be2 0-0 8.Kb1 Rfb8 9.Rhf1 Bh3 10.Rf2 Be6 11.Ka1 
  +/=  &#40;0.62&#41;   Depth&#58; 20/56   00&#58;18&#58;50  1093mN

(, chessengines20 10.01.2010&#41;

yanquis1972 · Post by **yanquis1972** » Sun Jan 10, 2010 12:15 am

5 min analysis of 64 bit IG, which appears to be legit (2 CPU):

2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2P3/1NN1BP2/PPPQ3P/2KR1B1R w k -

Engine: Igorrit version 0086v5 (256 MB)
by Yakov Petrovich Golyadkin, Igor Igorovi

13.02 0:01 +0.34 1.gxf6 bxc3 2.bxc3 gxf6 3.Bxa6 Nc4
4.Qd3 Nxe3 5.Bxc8 Bh6 6.Qb5+ Kf8
7.Bxe6 Nxd1+ 8.Kxd1 fxe6 9.Rg1 Be3
10.Rg4 Rg8 11.a4 (4.056.378) 2681

13.40 0:01 +0.34 1.gxf6 bxc3 2.bxc3 gxf6 3.Bxa6 Nc4
4.Qd3 Nxe3 5.Bxc8 Bh6 6.Qb5+ Kf8
7.Bxe6 Nxd1+ 8.Kxd1 fxe6 9.Rg1 Be3
10.Rg4 Rg8 11.a4 (4.059.545) 2683

14.01 0:02 +0.20 1.gxf6 bxc3 2.bxc3 gxf6 3.Bxa6 Nc4
4.Bb5+ Bd7 5.Bxc4 Rxc4 6.Rhg1 Qa8
7.Kb1 Qc6 8.Bh6 Ke7 9.Bxf8+ Rxf8
10.Qf2 Rxc3 11.Rg7 Qa6 12.Qh4 Rxf3
13.Rxh7 (5.772.688) 2762

14.02 0:02 +0.26 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Rb8 6.Kb1 Be7 7.Ka1 O-O
8.Bxa6 Qc6 9.Bd3 Bg4 10.Rdf1 Be6
11.h4 Nc5 12.Nxc5 dxc5 (6.945.849) 2800

14.40 0:02 +0.26 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Rb8 6.Kb1 Be7 7.Ka1 O-O
8.Bxa6 Qc6 9.Bd3 Bg4 10.Rdf1 Be6
11.h4 Nc5 12.Nxc5 dxc5 (6.949.328) 2802

15.01 0:02 +0.26 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Rb8 6.Kb1 Be7 7.Ka1 O-O
8.Bxa6 Qc6 9.Bd3 Bg4 10.Rdf1 Be6
11.h4 Nc5 12.Nxc5 dxc5 (7.811.456) 2829

15.40 0:03 +0.26 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Rb8 6.Kb1 Be7 7.Ka1 O-O
8.Bxa6 Qc6 9.Bd3 Bg4 10.Rdf1 Be6
11.h4 Nc5 12.Nxc5 dxc5 (8.794.544) 2818

16.01 0:03 +0.31 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Ra8 6.Qe2 Be7 7.Kb1 O-O
8.h4 Qc6 9.h5 Be6 10.h6 g6 11.Qf2 Rab8
12.Ka1 d5 (11.460.018) 2880

16.40 0:04 +0.31 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Bd3 Bd7 5.Qd2 Ra8 6.Qe2 Be7 7.Kb1 O-O
8.h4 Qc6 9.h5 Be6 10.h6 g6 11.Qf2 Rab8
12.Ka1 d5 (12.580.884) 2880

17.02 0:07 +0.29 1.gxf6 bxc3 2.bxc3 gxf6 3.Bxa6 Nc4
4.Bb5+ Bd7 5.Bxc4 Rxc4 6.Bh6 Be7
7.Rhg1 Qb6 8.Rg3 Qc7 9.Kb2 Be6
10.Qd3 Rc6 11.Qb5 f5 12.Na5 Qb6 (21.888.432) 2887

17.40 0:08 +0.29 1.gxf6 bxc3 2.bxc3 gxf6 3.Bxa6 Nc4
4.Bb5+ Bd7 5.Bxc4 Rxc4 6.Bh6 Be7
7.Rhg1 Qb6 8.Rg3 Qc7 9.Kb2 Be6
10.Qd3 Rc6 11.Qb5 f5 12.Na5 Qb6 (23.965.414) 2860

18.01 0:14 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (41.005.720) 2879

18.40 0:15 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (44.043.570) 2875

19.01 0:16 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (48.550.395) 2889

19.40 0:19 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (55.669.839) 2899

20.01 0:25 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (74.813.101) 2934

20.40 0:29 +0.41 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (87.097.823) 2926

21.01 0:39 +0.39 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (118.924.022) 3001

21.40 0:50 +0.39 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qc6 6.Bxa6 Ra8 7.Bb5 Qxe4
8.Bxd7+ Kxd7 9.Qb5+ Qc6 10.Qxc6+ Kxc6
11.Rf2 Nb6 12.Bxb6 Kxb6 13.Rxf7 Rxa2
14.Rhf1 (151.665.766) 3020

22.01 1:17 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (237.357.364) 3065

22.40 1:36 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (295.992.505) 3075

23.01 2:08 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (399.953.559) 3112

23.40 2:46 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (516.238.961) 3105

24.01 3:35 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (673.575.625) 3122

24.40 4:41 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (878.701.531) 3123

24.01 5:00 +0.40 1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7
4.Rd2 Bd7 5.Qa5 Qxa5 6.Nxa5 Rb8 7.c3 Be7
8.Bc4 O-O 9.Rf1 Rbc8 10.Rdf2 Rxc4
11.Nxc4 Bb5 12.Na5 Bxf1 13.Rxf1 Nc5
14.Nc6 (939.625.565) 3125

best move: Nc3-a4 time: 5:00.739 min n/s: 3.125.000 nodes: 939.625.565

beachknight · Post by **beachknight** » Sun Jan 10, 2010 12:56 am

Code: Select all

4&#58; 2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2
2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2P3/1NN1BP2/PPPQ3P/2KR1B1R w k - 0 1

Analysis by Fruit 2.2.1&#58;

1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Be7 6.Bxa6 Ra8 7.Be2 0-0 8.Kb1 Rfb8 9.Rhf1 Bh3 10.Rf2 Be6 11.Ka1 
  +/=  &#40;0.62&#41;   Depth&#58; 20/56   00&#58;18&#58;50  1093mN
1.Na4 Nxe4 2.fxe4 Nxa4 3.Qxb4 Qc7 4.Bd3 Bd7 5.Qd2 Qc6 6.Qa5 Ra8 7.Kb1 Be7 8.Rdf1 0-0 9.h4 Rfb8 10.Ka1 Be6 11.h5 Nc5 
  +/=  &#40;0.55&#41;   Depth&#58; 21/62   00&#58;40&#58;45  2358mN

(, chessengines20 10.01.2010&#41;

michiguel · Post by **michiguel** » Sun Jan 10, 2010 1:39 am

Eelco de Groot wrote:From a column in Chesscafé about the novelty of the year which was awarded to the game L. Domingues Perez - A. Morozevich from Wijk aan Zee. Any engines out there that stick to the best move? Apparently it has to be found on positonal grounds only, Stockfish 1.6.3s likes 13. gxf6 too and only very deeply calculating decides that there is probably no more than a total draw in that. Then it finds 13. Na4 again after about 20 hours. I suppose gxf6 is not so bad at some point it also gets a good score.

It is probably not so easy to say what you should evaluate better to just play Na4, I have no idea myself because the variations after gxf6 at one point became very different from each other, I have not seen many common traits there.

[Event "Corus 2009 "]
[Site "Wijk aan Zee"]
[Date "?"]
[Round "?"]
[White "L. Dominguez Perez "]
[Black "A. Morozevich "]
[WhiteElo "2717"]
[BlackElo "2771"]
[ECO "B90"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
e5 7. Nb3 Be6 8. Qd2 Nbd7 9. f3 b5 10. O-O-O Rc8 11. g4 Nb6
12. g5 b4 *

[D]2rqkb1r/5ppp/pn1pbn2/4p1P1/1p2P3/1NN1BP2/PPPQ3P/2KR1B1R w k -

Engine: Stockfish 1.6.3s(dc) Build 024 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski. Modifications by Dann Corbit, Eelco de Groot

1.00 0:00 +0.68 13.gxf6 (1.236) 6

2.00 0:00 +0.52 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 (1.396) 7

3.00 0:00 +0.52 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 (2.297) 12

3.00 0:00 +1.37 13.Nb1 Nfd7 14.Qxb4 (3.068) 16

4.00 0:00 +0.92 13.Nb1 Nfd7 14.Bxa6 Nc4 (3.503) 18

5.00 0:00 +0.72 13.Nb1 Nfd7 14.Bxa6 Nc4 15.Bxc4 Rxc4 (5.708) 28

6.00 0:00 +0.72 13.Nb1 Nfd7 14.Bxa6 Nc4 15.Bxc4 Rxc4 (9.706) 47

6.00 0:00 +1.57++ 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 (13.128) 59

7.00 0:00 +0.24 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Rc6 17.Bb5 (17.438) 79

7.00 0:00 +0.80 13.Nb1 Nfd7 14.Bxa6 Nc4 15.Bxc4 Rxc4
16.h4 (19.891) 85

7.00 0:00 +1.05 13.Bxb6 Qxb6 14.Na4 Qc6 15.gxf6 Qxa4
16.fxg7 Bxg7 17.Qxd6 Bh6+ 18.Kb1 (36.684) 137

8.00 0:00 +0.40 13.Bxb6 Qxb6 14.Na4 Qc6 15.Nac5 Nd7
16.Nxe6 fxe6 17.Na5 Qb6 18.Nc4 (54.539) 174

8.00 0:00 +0.92 13.Nb1 Nfd7 14.Na5 Qc7 15.Bxa6 Ra8
16.Bxb6 Qxb6 (62.777) 191

9.00 0:00 +0.76 13.Nb1 Nfd7 14.Bxa6 Nc4 15.Bxc4 Rxc4
16.h4 f5 17.Qf2 fxe4 18.fxe4 Rxe4 (92.129) 235

10.00 0:00 +0.80 13.Nb1 Nfd7 14.Qxb4 Nc4 15.Bxc4 Rxc4
16.Qb7 Be7 17.Nc3 Rc7 18.Qxa6 Bxg5 (249.528) 354

11.00 0:01 +0.56-- 13.Nb1 Nfd7 14.Qxb4 d5 15.Qd2 Be7
16.Bxa6 Ra8 (411.540) 399

11.07 0:01 +1.05++ 13.Na4 Nxa4 14.gxf6 gxf6 15.Bxa6 (734.673) 443

12.01 0:02 +1.13 13.Na4 Nxa4 14.gxf6 gxf6 15.Bxa6 Rb8
16.Ba7 Ra8 17.Qxb4 Rxa7 18.Qxa4+ Qd7
19.Qa5 Bh6+ 20.Kb1 Bxb3 21.axb3 Qc6
22.Bb5 Rxa5 23.Bxc6+ Ke7 (998.193) 462

13.01 0:05 +1.17 13.Na4 Nxa4 14.gxf6 gxf6 15.Bxa6 Rb8
16.f4 Qc7 17.Qd3 Rg8 18.Bb5+ Bd7
19.Bxd7+ Qxd7 20.fxe5 fxe5 21.Kb1 Rg2
22.Qf1 Qg4 23.Qc4 Qd7 (2.552.766) 508

14.01 0:08 +0.92-- 13.Na4 Nxe4 14.fxe4 Nxa4 15.Bxa6 Rb8
16.Ba7 Ra8 17.Qxb4 Rxa7 18.Qxa4+ Bd7
19.Qc4 Qb6 (4.322.045) 521

15.01 0:18 +0.48 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.c3 Bd7 17.Qa5 Be7 18.Qxc7 Rxc7 19.Bxa6
O-O 20.Bd3 f5 21.exf5 Bxf5 22.Rhf1 e4 (9.780.907) 532

16.01 1:00 +0.60 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Rd2 Bd7 17.Qa5 Be7 {This variation follows
the game, Morozevich continued with 17... Qc6}
18.Qxc7 Rxc7 19.Bxa6 O-O 20.Rf1 Bc6 21.Bd3
Bd7 22.h4 Bh3 23.Rh1 Bd7 24.Kb1 Rb8
25.Be2 Bc6 26.Bf3 (32.172.075) 532

16.03 1:21 +0.64 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Bb5+ Bd7 17.Bxc4 Rxc4 18.Bh6 Rc6
19.Bxf8 Rxf8 20.Rhg1 Qc7 21.Rg7 Rxc3
22.Rxh7 f5 23.Qxd6 Rxc2+ 24.Kb1 Qxd6
25.Rxd6 Ke7 26.Kxc2 (43.632.834) 534

17.01 1:46 +0.48 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Bb5+ Bd7 17.Bxc4 Rxc4 18.Bh6 Be6
19.Bxf8 Rxf8 20.Kb1 Qc7 21.Qxd6 Qxd6
22.Rxd6 Rxc3 23.Rd3 Rxd3 24.cxd3 Ke7
25.Rc1 Rd8 26.Kc2 (56.976.393) 532

18.01 3:38 +0.40 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Bb5+ Bd7 17.Bxc4 Rxc4 18.Bh6 Be6
19.Bxf8 Rxf8 20.Rhg1 Qc7 21.Qxd6 Qxd6
22.Rxd6 Rxc3 23.Rd3 Rxd3 24.cxd3 Ke7
25.Rg2 f5 26.Rc2 (117.210.503) 537

19.01 5:31 +0.40 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Bb5+ Bd7 17.Bxc4 Rxc4 18.Bh6 Be6
19.Bxf8 Rxf8 20.Rhg1 Qc7 21.Qxd6 Qxd6
22.Rxd6 Rxc3 23.Rd3 Rxd3 24.cxd3 Ke7
25.Rg7 h5 26.Rg2 (177.250.220) 535

20.01 11:49 +0.60++ 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.c5 Qc7 20.Qd3 Qa7 21.Rd2 Bh6
22.Qxd6 Bxd2+ 23.Nxd2 (375.413.691) 528

21.01 12:41 +0.40 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.c5 Qc7 20.Qd3 Qa7 21.Rd2 Rg8
22.f4 exf4 23.Rf1 Rg7 24.a4 Bxa4
25.Bc4 Kd8 26.cxd6 (402.522.483) 528

22.01 41:50 +0.28 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.c5 Bh6+ 21.Kb2 Qxc5
22.Qxd6 Qxd6 23.Rxd6 Bf8 24.Rdd1 Rg8
25.Rhg1 Rxg1 26.Rxg1 (1.283.593.304) 511

22.02 44:33 +0.36 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Nc5
19.Bxc5 Rxc5 20.b4 Rc7 21.Bxa6 Be7
22.Rhg1 h6 23.g6 fxg6 24.Nc4 Ba4
25.Rxg6 O-O 26.Rdg1 (1.360.560.811) 508

23.01 58:02 +0.24 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.h4 O-O 21.h5 Rb8 22.h6 g6
23.Kb1 Be6 24.Be2 Rb4 25.Bf3 f6
26.gxf6 (1.781.336.079) 511

24.01 103:12 +0.24 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.h4 O-O 21.h5 Bg4
22.Rdg1 Be6 23.Kb1 f6 24.gxf6 Bxf6
25.h6 g6 26.Rd1 (3.211.250.702) 518

25.01 199:14 +0.32 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.h4 O-O 21.h5 Bg4
22.Rdg1 Be6 23.Kb1 Rb8 24.h6 g6
25.Rf1 Bc4 26.Rf2 (6.134.342.476) 513

26.01 392:06 +0.24 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.h4 O-O 21.h5 Bg4
22.Rd2 Be6 23.h6 Rb8 24.Kb1 g6
25.Be2 Rb4 26.Bf3 (12.132.648.971) 515

26.04 559:22 +0.36 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.c5 Bh6+ 21.Kb2 Qxc5
22.Qxd6 Qxd6 23.Rxd6 Bf8 24.Rdd1 Bc5
25.Rd5 Be3 26.Rhd1 (17.447.088.586) 519

27.01 744:53 +0.56++ 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rd5 (23.521.070.825) 526

28.01 1223:070.00 13.gxf6 bxc3 14.bxc3 gxf6 15.Bxa6 Nc4
16.Qd3 Ke7 17.Kb1 Rc6 18.Bb5 Na3+
19.Ka1 Nxb5 20.Qxb5 Qc8 21.Rhg1 Bd7
22.Kb1 Ke8 23.Qe2 Qa8 24.Rd5 Ra6
25.Qc4 Be6 26.Qb5+ (38.702.047.486) 527

28.02 1379:31+0.24 13.Na4 Nxe4 14.fxe4 Nxa4 15.Qxb4 Qc7
16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.h4 O-O 21.h5 Bg4
22.Rd2 Be6 23.h6 Rb8 24.Kb1 g6
25.Be2 Rb4 26.Bf3 (43.669.719.983) 527

best move: Nc3-a4 time: 1462:04.594 min n/s: 527.851 nodes: 46.305.570.436

Gaviota plays Na4 and sticks to it after 9.6s, with a smiley. The score is really nice (+1.37)

Miguel

analyze
********* Starts iterative deepening, thread = 0
set timer to infinite
36 1 0.0 +0.44 1.gxf6 bxc3
550 1 0.0 +0.52 1.Qf2 bxc3 2.Bxb6 cxb2+ 3.Kxb2
703 1 0.0 +0.53 1.Qe1 bxc3 2.gxf6 cxb2+ 3.Kxb2
936 2 0.0 +0.40 1.Qe1 bxc3 2.gxf6 Bxb3 3.axb3 cxb2+
4.Kxb2 Qxf6
1389 2 0.0 +0.52 1.Qf2 bxc3 2.Bxb6 cxb2+ 3.Kxb2
3010 2 0.0 +0.83 1.Nb5 axb5 2.gxf6
4172 3 0.0 +0.83 1.Nb5 axb5 2.gxf6
9971 4 0.1 +0.99 1.Nb5 axb5 2.gxf6 Nc4
22624 4 0.1 +1.24 1.Nb1 Nc4 2.Bxc4 Rxc4 3.gxf6 Qxf6
38579 5 0.2 +1.24 1.Nb1 Nc4 2.Bxc4 Rxc4 3.gxf6 Qxf6
107778 6 0.4 +1.13 1.Nb1 Nfd7 2.Qxb4 d5 3.Qa5 d4
168594 6: 0.7 +1.13 1.Nb1 Nfd7 2.Qxb4 d5 3.Qa5 d4
272135 7 1.0 +1.19 1.Nb1 Nfd7 2.Bxa6 Nc4 3.Bxc4 Rxc4 4.Qf2
505635 7 1.7 +1.21 1.Na4 Nxa4 2.gxf6 Qxf6 3.Qxb4 Nxb2
4.Kxb2 Qxf3
614467 7: 2.0 +1.21 1.Na4 Nxa4 2.gxf6 Qxf6 3.Qxb4 Nxb2
4.Kxb2 Qxf3
670312 8 2.2

1.Na4
1270022 8 3.2

1425050 8 3.4 +0.37 1.Na4 Nxa4 2.gxf6 Qxf6 3.Be2 Bc4 4.Bxc4
Rxc4 5.Qg2
1699216 8 3.7 +0.77 1.Nb1 Nfd7 2.Qxb4 d5 3.Qe1 d4 4.Nxd4
exd4 5.Rxd4
2159391 8: 4.2 +0.77 1.Nb1 Nfd7 2.Qxb4 d5 3.Qe1 d4 4.Nxd4
exd4 5.Rxd4
2924579 9 5.1 +1.07 1.Nb1 Nfd7 2.Bxa6 Nc4 3.Bxc4 Rxc4 4.Qf2
Rc6 5.h3
4290785 9: 6.5 +1.07 1.Nb1 Nfd7 2.Bxa6 Nc4 3.Bxc4 Rxc4 4.Qf2
Rc6 5.h3
5612531 10 8.1 +0.68 1.Nb1 Nfd7 2.Bxa6 Nc4 3.Bxc4 Rxc4 4.Qe2
Qa8 5.N1d2 Rc6
7066604 10 9.6 +0.95 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8
11424105 10: 14.0 +0.95 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8
15315040 11 18.1

1.Na4
18968550 11 21.8 +1.38 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8 8.Rdf1
29899433 11: 32.9 +1.38 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8 8.Rdf1
41133924 12 44.4 +1.17 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8 8.Rdf1 Nc5 9.Nxc5 dxc5
95614102 12: 98.9 +1.17 1.Na4 Nxa4 2.gxf6 Qxf6 3.Bxa6 Qxf3
4.Bb5+ Bd7 5.Bxd7+ Kxd7 6.Rhf1 Qxe4
7.Rxf7+ Ke8 8.Rdf1 Nc5 9.Nxc5 dxc5
181613001 13 186.0 +1.37 1.Na4 Nxe4 2.fxe4 Nxa4 3.Bxa6 Rb8 4.Kb1
Qd7 5.Qf2 Qc6 6.Ba7 Ra8 7.Bd3
392242977 13: 393.8 +1.37 1.Na4 Nxe4 2.fxe4 Nxa4 3.Bxa6 Rb8 4.Kb1
Qd7 5.Qf2 Qc6 6.Ba7 Ra8 7.Bd3

Eelco de Groot · Post by **Eelco de Groot** » Sun Jan 10, 2010 1:51 am

Thanks for all the feedback guys! John, just because this version of Iggorit exists does that make it legitimate

Standards, my friends, we need standards.
It is of course not a new novelty, but that is because it was awarded a prize by the readers of Informant for one of the most influential novelties in the last issue. So I thought it might be a good idea to give it some computer analysis. I see that most computers agree with Na4, thanks Harun! Crafty is the noticeable exception here. Crafty knows a lot about pawns so I would not dismiss its opinion here lightly. Shredder 12 does not like gxf6 so much. It still might be that with deeper searching 13. gxf6 is found playable as well by some engines. In fact I tried to apply a correction so that 13. gxf6 would get less points but that seemed to have an opposite effect. I increased the penalty for a doubled isolated pawn that ensues if White takes on c3 after 13. gxf6. But now it seems less playable for Black for a strange reason. Maybe because White decides to use the marginal pawn on c3 for a crowbar, trying to exchange it on c5 or d6. If he can get away with that he could be building some sort of attack. Anyway that was my explanation. Looking at the position that can arise after

[Event "Corus 2009 "]
[Site "Wijk aan Zee"]
[Date "2010.01.10"]
[Round "?"]
[White "L. Dominguez Perez "]
[Black "A. Morozevich "]
[WhiteElo "2717"]
[BlackElo "2771"]
[ECO "B90"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
e5 7. Nb3 Be6 8. Qd2 Nbd7 9. f3 b5 10. O-O-O Rc8 11. g4 Nb6
12. g5 b4 (13. gxf6 bxc3 14. bxc3 gxf6 15. Bxa6 Nc4 16. Qd3 *)

[D]2rqkb1r/5p1p/B2pbp2/4p3/2n1P3/1NPQBP2/P1P4P/2KR3R b k -

Engine: Stockfish 1.6.3s(dc) Build 025 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski, Modifications by Dann cornit, Eelco de Groot

1.00 0:00 -0.16 16...Rc6 (1.194) 8

2.00 0:00 -0.20 16...Rc6 17.Bb5 (1.320) 8

3.00 0:00 -1.97 16...Rc6 17.Bb5 Qc8 18.Bxc6+ Qxc6 (1.779) 11

3.00 0:00 -0.40 16...Nxe3 17.Bxc8 Bh6 18.Bxe6 Nxd1+
19.Kb1 fxe6 20.Rxd1 (3.135) 19

4.00 0:00 -0.40 16...Nxe3 17.Bxc8 Bh6 18.Bxe6 Nxd1+
19.Kb1 fxe6 20.Rxd1 (4.266) 27

5.00 0:00 -0.24 16...Nxe3 17.Bxc8 Bh6 18.Bxe6 Nxd1+
19.Kxd1 fxe6 20.Rg1 (7.714) 49

6.00 0:00 -0.56-- 16...Nxe3 17.Qxe3 Rb8 18.a4 Bxb3
19.cxb3 Rxb3 20.Bb5+ (13.080) 76

7.00 0:00 -0.88 16...Nxe3 17.Qxe3 Rb8 18.a4 Bd7
19.Bc4 Qc7 20.Qd3 Bh6+ 21.Kb1 Bxa4
22.Qxd6 Qxd6 23.Rxd6 (20.937) 111

7.00 0:00 -0.52 16...Na3 17.Bxc8 Qxc8 18.Rdg1 Bc4
19.Qd2 Bb5 20.Bb6 (30.169) 148

8.00 0:00 -0.68 16...Na3 17.Bxc8 Qxc8 18.Rdg1 Bc4
19.Qd2 Bb5 20.Bb6 Qc6 21.Ba5 (49.214) 196

9.00 0:00 -0.68 16...Na3 17.Bxc8 Qxc8 18.Kb2 Qa8
19.Ka1 Bc4 20.Qd2 Be6 21.Bh6 Nc4
22.Qc1 (124.148) 305

10.00 0:00 -0.88-- 16...Na3 17.Bxc8 Qxc8 18.Kb2 Qa8
19.Ka1 Bc4 20.Qd2 Be6 21.Bh6 Nc4
22.Qc1 (210.830) 364

11.00 0:00 -0.96 16...Na3 17.Bxc8 Qxc8 18.f4 Bg4
19.fxe5 fxe5 20.Rhf1 Bxd1 21.Kxd1 Nc4
22.Kc1 Nxe3 23.Qxe3 (387.873) 413

11.00 0:01 -0.60 16...Nxe3 17.Qxe3 Ra8 18.Bb5+ Bd7
19.a4 Bxb5 20.axb5 Ra2 21.Kd2 Rg8
22.Rdg1 Rg6 23.Rxg6 hxg6 24.Ra1 Rxa1
25.Nxa1 d5 (830.691) 470

12.01 0:04 -0.60 16...Nxe3 17.Qxe3 Ra8 18.Qd3 Bh6+
19.Kb1 Rg8 20.Bb5+ Kf8 21.a4 Qe7
22.Rhg1 Rxg1 23.Rxg1 Bg5 24.Rd1 Rc8
25.c4 Rd8 26.a5 (2.464.572) 510

13.01 0:07 -0.44 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.Bb5 Bxb5 21.cxb5 Qxb5
22.Qxb5+ Rxb5 23.Kb2 Ke7 24.Rhg1 Bh6
25.c4 (4.127.437) 518

14.01 0:11 -0.56 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Kb1 Qc7 20.Qd3 Rg8 21.Bb5 Rg2
22.Qf1 Rg8 23.f4 Bxb5 24.cxb5 exf4
25.Qxf4 Rg2 (6.120.147) 522

15.01 0:16 -0.36 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rhg1 Qc7 20.Kb1 Rb6 21.Bb5 Bxb5
22.cxb5 Rxb5 23.h4 Rb6 24.a4 Rc6
25.Rg2 Rc3 26.Rd3 Rxd3 27.Qxd3 Bh6
28.a5 (8.976.206) 534

16.01 0:25 -0.36 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rhg1 Qc7 20.Kb1 Rb6 21.Bb5 Bxb5
22.cxb5 Rxb5 23.h4 Rb6 24.a4 Rc6
25.Rg2 Rc3 26.Rd3 Rxd3 27.cxd3 Qb7
28.Rb2 d5 29.Nc5 Qc7 (13.772.905) 541

17.01 0:29 -0.56-- 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rhg1 Qc7 20.Kb1 Rb6 21.Bb5 Bxb5
22.cxb5 Rxb5 23.f4 exf4 24.Qxf4 Qc3
25.Rdf1 Be7 26.Rf3 (16.011.245) 543

17.04 0:46 -0.16++ 16...Qd7 17.Bxc8 Qxc8 18.Kb1 Na3+
19.Ka1 Bc4 20.Qd2 Be2 21.f4 Bf3
22.fxe5 fxe5 23.Rhf1 Bxe4 24.Bc5 Nxc2+
25.Kb1 Na3+ 26.Kb2 Nc4+ (25.408.448) 540

18.01 1:12 -0.68 16...Qd7 17.Bxc8 Qxc8 18.Rhg1 Qa8
19.Kb1 Na3+ 20.Ka1 Bc4 21.Qd2 Be6
22.Qc1 h5 23.Rd3 Nc4 24.Rgd1 h4
25.Bf2 Bh6 26.Qb1 (38.641.505) 535

18.02 1:48 -0.16 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Bb5 Bxb5 20.cxb5 Rxb5 21.Kb1 Qc7
22.Rhg1 Rb6 23.Qd3 Qc6 24.Qd5 Qa4
25.c4 Rc6 26.Ka1 Qxc4 (58.729.994) 539

19.01 2:51 -0.36 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.c5 Qb4 21.Bc4 Qa4
22.cxd6 Bh6+ 23.Kb1 O-O 24.Ka1 Rfc8
25.Bd5 Ra8 26.Rhg1+ Kh8 27.Nc5 Rxc5
28.Bxa8 Qxa8 29.Qb3 Bg5 (92.023.972) 535

20.01 6:07 -0.52 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.c5 Qb4 21.Bc4 Qa4
22.cxd6 Bh6+ 23.Kb1 O-O 24.Ka1 Qa3
25.Rhg1+ Kh8 26.c3 Rb6 27.Qc2 Rxd6
28.Rxd6 Qxd6 29.Rd1 Qc7 (194.919.467) 530

20.02 7:25 -0.48 16...h5 17.Bxc8 Qxc8 18.Kb1 Na3+
19.Kb2 Qa8 20.Rhg1 Bc4 21.Qd2 Be6
22.Ka1 Nc4 23.Qd3 Na3 24.Bc1 Bc4
25.Qd2 Nb5 26.Kb1 Bh6 27.Qe1 Na3+
28.Bxa3 Qxa3 29.Ka1 (237.553.664) 533

21.01 8:42 -0.92-- 16...h5 17.Bxc8 Qxc8 18.Kb1 Na3+
19.Kb2 Qa8 20.Rhg1 Bc4 21.Qd2 Be6
22.Ka1 Nc4 23.Qd3 Na3 24.Bc1 Bc4
25.Qd2 Nb5 26.Bb2 d5 27.Kb1 h4
28.exd5 Bh6 (277.929.086) 531

21.02 9:29 -0.52 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Qd3 Qb6 20.c5 Qb4 21.Bc4 Qa4
22.Kb1 Rb4 23.Bd5 dxc5 24.a3 Rb6
25.Rhg1 Rd6 26.Qc4 Qxc4 27.Bxc4 f5
28.Rxd6 Bxd6 29.Rg7 fxe4 (304.370.921) 534

22.01 14:14 -0.32++ 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7 (455.320.079) 533

23.01 31:21 -0.68 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rd5 Rg8 20.Qd2 Ra8 21.Bb5 Bxb5
22.Rxb5 Be7 23.Rd1 Qc8 24.Ra5 Qc6
25.Rxa8+ Qxa8 26.Kb1 Qa6 27.c5 dxc5
28.c4 Qc8 29.Kc1 f5 (992.402.667) 527

Suddenly it is no longer a 0.00 score here...

Regards,
Eelco

Eelco de Groot · Post by **Eelco de Groot** » Sun Jan 10, 2010 1:59 am

michiguel wrote: Gaviota plays Na4 and sticks to it after 9.6s, with a smiley. The score is really nice (+1.37)

Miguel

Thanks Miguel! That is really looking good for Gaviota. Is the novelty that good !? Well you are the better player here probably unless Slavik is an anonymous GM, do you think, or does Gaviota think, that 13. gxf6 is inferior?

Regards,
Eelco

yanquis1972 · Post by **yanquis1972** » Sun Jan 10, 2010 2:42 am

John, just because this version of Iggorit exists does that make it legitimate Standards, my friends, we need standards.

true, but i also need a diversion until rybka 4 is released. which i will very happily pay money for, provided it's a quality product.

i don't really feel for vas in this situation as should igorrit be stronger than rybka, he can release rybka 4 at any moment of his choosing & make the whole thing moot.

Eelco de Groot · Post by **Eelco de Groot** » Sun Jan 10, 2010 3:21 pm

Eelco de Groot wrote: 23.01 31:21 -0.68 16...Nxe3 17.Qxe3 Rb8 18.c4 Bd7
19.Rd5 Rg8 20.Qd2 Ra8 21.Bb5 Bxb5
22.Rxb5 Be7 23.Rd1 Qc8 24.Ra5 Qc6
25.Rxa8+ Qxa8 26.Kb1 Qa6 27.c5 dxc5
28.c4 Qc8 29.Kc1 f5 (992.402.667) 527

Suddenly it is no longer a 0.00 score here...

Regards,
Eelco

Just wanted to add that I should have waited a bit longer. There were no hash contents anymore so it was more difficult to find but a little bit later I got:

[D]2rqkb1r/5p1p/B2pbp2/4p3/2n1P3/1NPQBP2/P1P4P/2KR3R b k -

Engine: Stockfish 1.6.3s(dc) Build 025 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski

23.21 118:32 0.00 16...Ke7 17.Kb1 Rc6 18.Bb7 Rc7
19.Ba6 Rc6 (3.762.176.432) 528

The conclusion seems to be for Stockfish that both sides can't afford to attack and have to protect their Kings, i.e strengthen the bases of the pawn chains that form their pawn shelter. (a2 is a pawn chain of one

)It is very interesting but I wish that did not take 118 minutes

Both King moves Ke7 and Kb1 are quiet moves that is one part of the problem.

I think my Rybka 2.3.2a in this position just gives lower scores to the attacking possibilities on both sides:

2rqkb1r/5p1p/B2pbp2/4p3/2n1P3/1NPQBP2/P1P4P/2KR3R b k -

Engine: Rybka 2.3.2a PV-tips32-bit (128 MB)
by Vasik Rajlich

21.01 16:48 -0.19 16...Nxe3 17.Qxe3 Rb8 18.c4 Qb6
19.Qxb6 Bh6+ 20.Kb2 Rxb6 21.Bb5+ Ke7
22.a4 Rc8 23.a5 Rbb8 24.Rd3 Bxc4
25.Bxc4 Rxc4 26.Rhd1 Rbc8 27.c3 R4c6
28.Rg1 (68.066.870) 69

22.01 30:51 -0.24 16...Nxe3 17.Qxe3 Rb8 18.c4 Qb6
19.Qxb6 Bh6+ 20.Kb2 Rxb6 21.Bb5+ Ke7
22.Rd3 f5 23.a4 fxe4 24.fxe4 f5
25.c5 dxc5 26.Nxc5 fxe4 27.Nxe4 Bf5
28.Re1 Bf4 29.c4 (121.685.875) 67

23.01 52:18 -0.20 16...Nxe3 17.Qxe3 Rb8 18.c4 Qb6
19.Qxb6 Bh6+ 20.Kb2 Rxb6 21.Bb5+ Ke7
22.Rd3 f5 23.a4 fxe4 24.fxe4 f5
25.c5 dxc5 26.Nxc5 fxe4 27.Nxe4 Bf5
28.Re1 Bf4 29.c4 Rh6 (207.145.964) 67

Eelco

Eelco de Groot · Post by **Eelco de Groot** » Sun Jan 10, 2010 6:08 pm

After 16... Ke7 Rybka 2.3.2a sees it too:

[D]2rq1b1r/4kp1p/B2pbp2/4p3/2n1P3/1NPQBP2/P1P4P/2KR3R w - -

Engine: Rybka 2.3.2a PV-tips32-bit (128 MB)
by Vasik Rajlich

8.00 0:00 +0.73 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 Ke7 24.Rhg1 (19.573) 71

9.00 0:00 +0.44 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 Ke7 24.Qb6 Rd8 (45.273) 70

10.00 0:01 +0.44 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 Ke7 24.Qb6 Rd8 25.Rhg1 (73.338) 72

11.00 0:01 +0.56 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 Ke7 24.Qb6 Rd8 25.Rhg1 h6 (125.530) 74

12.01 0:03 +0.52 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 Ke7 24.Qb6 Rd8 25.Rhg1 f5
26.Qb7+ (225.614) 76

13.01 0:06 +0.48 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Ke8 22.cxd6 Bxd6
23.Nb1 (461.574) 77

14.01 0:15 +0.27 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qc3 Rc8 (1.184.277) 76

15.01 0:37 +0.31 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qc3 Rc8 24.Qb2 (2.693.316) 72

16.01 1:17 +0.31 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qc3 Rc8 24.Qb2 Qa5 (5.508.567) 72

17.01 2:07 +0.48 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qb6 Rc8 24.Qb2 Qa5 25.c3 (9.013.675) 72

18.01 3:56 +0.24 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qb6 Rc8 24.Qb2 Qa5 25.c3 (16.735.112) 72

19.01 7:48 +0.23 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.c4 Qxa2 21.c5 Bh6 22.cxd6+ Kd7
23.Qb6 Rc8 24.Qb2 Qa5 25.c3 Rxc3+
26.Kb1 Bxd2 27.Qb7+ (33.556.393) 73

20.01 17:55 +0.18 17.Bxc8 Qxc8 18.Nd2 Nxe3 19.Qxe3 Qa6
20.Rde1 h5 21.Kd1 Bh6 22.Qd3 Qa3
23.Ke2 Rc8 24.c4 Qa7 25.a3 Rg8 (75.781.112) 72

20.25 27:04 +0.20 17.Kb1 Na3+ 18.Ka1 Ra8 19.Bb7 Bc4
20.Qd2 Rb8 21.Bd5 Bxd5 22.exd5 Ra8
23.Qd3 Qc8 24.Nd2 h5 25.Rdg1 Bh6
26.Bxh6 (113.668.967) 71

21.01 70:48 0.00 17.Kb1 Rc6 18.Bb7 Rc7 19.Ba6 Rc6
20.Bb7 Rc7 21.Ba6 Rc6 22.Bb7 Rc7
23.Ba6 Rc6 24.Bb7 Rc7 25.Ba6 Rc6
26.Bb7 Rc7 27.Ba6 Rc6 28.Bb7 Rc7
29.Ba6 Rc6 30.Bb7 (272.114.141) 65

22.01 133:37 0.00 17.Kb1 Rc6 18.Bb7 Rc7 19.Ba6 Rc6
20.Bb7 Rc7 21.Ba6 Rc6 22.Bb7 Rc7
23.Ba6 Rc6 24.Bb7 Rc7 25.Ba6 Rc6
26.Bb7 Rc7 27.Ba6 Rc6 28.Bb7 Rc7
29.Ba6 Rc6 30.Bb7 (508.960.719) 65

best move: Kc1-b1 time: 134:45.468 min n/s: 65.105 nodes: 514.073.746

Eelco de Groot · Post by **Eelco de Groot** » Mon Jan 11, 2010 2:05 pm

In the Na4 line, Stockfish 1.6.3.s(dc) finally sees more in the position after 15... Qc7

[Event "Corus 2009 "]
[Site "Wijk aan Zee"]
[Date "2010.01.10"]
[Round "?"]
[White "L. Dominguez Perez "]
[Black "A. Morozevich "]
[WhiteElo "2717"]
[BlackElo "2771"]
[ECO "B90"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
e5 7. Nb3 Be6 8. Qd2 Nbd7 9. f3 b5 10. O-O-O Rc8 11. g4 Nb6
12. g5 b4 13. gxf6 (13. Na4 {Main line} Nxe4 14. fxe4 Nxa4 15. Qxb4 Qc7 {See analysis below} 16. Bd3 (16. Rd2 {Main variation})) 13... bxc3 14. bxc3 gxf6 15. Bxa6 Nc4 16. Qd3 Ke7 17. Bxc8 { ?! Tempting because of the material plus pawn and exchange but this is a bit deceptive, Stockfish finds 17. Kb1 is needed} 17...Qxc8

[D]2r1kb1r/2q2ppp/p2pb3/4p1P1/nQ2P3/1N2B3/PPP4P/2KR1B1R w k -

Engine: Stockfish 1.6.3s(dc) (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski Modifications Dann Corbit, Eelco de Groot

1.00 0:00 +4.00 16.Qxa4+ (344) 3

2.00 0:00 -0.04 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4 (562) 2

3.00 0:00 -0.04 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4 (927) 2

4.00 0:00 -0.04 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4 (1.536) 3

5.00 0:00 -0.12 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4
19.Nd2 (3.107) 3

6.01 0:01 -0.08 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4
19.Nd2 Ra4 20.a3 Be7 21.Rhf1 (5.634) 3

7.01 0:04 -0.28-- 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4
19.Nd2 Rc8 20.Rhf1 Bb5 (20.227) 4

8.01 0:05 -0.24 16.Qxa4+ Bd7 17.Qc4 Qxc4 18.Bxc4 Rxc4
19.Nd2 Rc8 20.b3 Be6 21.Nf3 Be7 (23.851) 4

8.09 0:06 +0.56++ 16.c3 Qc6 17.Na5 (32.463) 5

9.01 0:09 +0.16 16.c3 Bd7 17.Bh3 Bxh3 18.Qxa4+ Qd7
19.Qxa6 Bg2 20.Rhf1 Bxf1 21.Rxf1 (65.597) 7

10.01 0:11 +0.52 16.c3 Bd7 17.Qa5 Be7 18.Qxc7 Rxc7
19.Bxa6 O-O 20.Kb1 Ra8 21.Bd3 Bg4 (215.213) 18

11.01 0:13 +0.56 16.c3 Bd7 17.Rd5 Rb8 18.Qa5 Nb6
19.Rd2 Be7 20.Bxa6 O-O 21.Kb1 Bg4 (941.803) 71

12.01 0:14 +0.12-- 16.c3 Bd7 17.Rd5 Rb8 18.Qa5 Nb6
19.Rd2 Be7 20.Bxa6 O-O 21.Kb1 Qc6 (1.694.381) 114

13.01 0:18 +0.12 16.c3 Bd7 17.Rd5 Rb8 18.Qa5 Nb6
19.Rd1 Be7 20.Kb1 O-O 21.Bd3 Bc6
22.Qxa6 d5 23.exd5 Nxd5 (3.393.267) 185

14.01 0:24 +0.08 16.c3 Bd7 17.Rd5 Rb8 18.Qa5 Nb6
19.Rd2 Be7 20.Bxa6 O-O 21.Bd3 Rfc8
22.h4 Nc4 23.Qxc7 Rxc7 24.Bxc4 Rxc4 (6.328.550) 261

14.02 0:28 +0.48 16.Rd2 Bd7 17.Bxa6 d5 18.Qb7 d4
19.Bf2 Qxb7 20.Bxb7 Rc7 21.Bd5 Bb4
22.Rd3 Bb5 23.Rf3 Bd6 24.Kb1 O-O (8.620.811) 300

15.01 0:33 +0.20 16.Rd2 Bd7 17.Bxa6 d5 18.Qb7 d4
19.Bf2 Be7 20.Bg3 Bxg5 21.Qxc7 Rxc7
22.Bxe5 Rc6 23.Bb5 Rg6 24.Bd3 O-O
25.Bxd4 Rb8 26.c4 Bxd2+ 27.Kxd2 Rd6 (11.289.851) 332

16.01 1:31 +0.28 16.Rd2 Bd7 17.Qa5 Qc6 18.Bd3 Ra8
19.Qb4 Be7 20.Qc4 O-O 21.Qxc6 Bxc6
22.Rf1 Bd7 23.h4 Rfc8 24.c3 f6
25.Kb1 fxg5 26.hxg5 (40.037.074) 437

17.01 1:48 +0.08 16.Rd2 Bd7 17.Qa5 Qc6 18.Bd3 Ra8
19.Rf1 Be7 20.Qd5 Qxd5 21.exd5 O-O
22.Rdf2 f6 23.gxf6 Bxf6 24.Kb1 Rab8
25.Bxa6 Nb6 26.Rd1 Ra8 27.Be2 (48.620.261) 447

18.01 3:08 +0.04 16.Rd2 Bd7 17.Qa5 Qc6 18.Bd3 Ra8
19.Rf1 Be7 20.Qd5 Qxd5 21.exd5 O-O
22.Rdf2 f6 23.gxf6 Rxf6 24.Rxf6 Bxf6
25.c3 Be7 26.Kc2 Bh3 27.Rg1 g6
28.Rg3 Bd7 (88.279.729) 468

18.03 3:37 +0.16 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rdf1 Bg4 23.Rf2 Be6 24.Rhf1 d5
25.c3 dxe4 26.Bxe4 (102.865.735) 473

19.01 4:10 +0.16 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rdf1 Bg4 23.Rf2 Be6 24.Rd1 Rb4
25.Rh2 Rb8 26.Be2 f5 27.gxf6 Bxf6
28.c3 Be7 (119.576.359) 477

20.01 6:47 +0.16 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rdf1 Bg4 23.Rf2 Be6 24.Rd1 Bg4
25.Rdf1 Be6 26.Re1 h6 27.c3 hxg5
28.hxg5 (197.017.983) 483

21.01 10:31 +0.16 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rhf1 Bg4 23.Rde1 Be6 24.Rf2 Rb7
25.h5 d5 26.exd5 Bxd5 27.Bc1 Bd6
28.Na5 Nc3+ 29.Ka1 (302.644.271) 479

22.01 15:34 +0.16 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rhf1 Be6 23.Rf2 Rd8 24.Rfd2 Rb8
25.Be2 Rb7 26.Rf1 Rb4 27.Bh5 Rc7
28.Bf3 Rb8 (451.206.480) 482

23.01 34:15 +0.12 16.Bd3 Bd7 17.Qa5 Qxa5 18.Nxa5 Be7
19.Nb3 Rc6 20.Kb1 O-O 21.h4 Rb8
22.Rhf1 Be6 23.Rf2 Rd8 24.Rfd2 Rb8
25.Be2 Rb7 26.Rf1 Rb4 27.Bf3 Rb8
28.h5 Bc4 29.Rfd1 (1.000.562.916) 486

23.04 49:17 +0.36++ 16.Rd2 (1.413.883.300) 478

24.01 73:22 +0.52 16.Rd2 Bd7 17.Qa5 Qc6 18.Bxa6 Rb8
19.Rd5 Be7 20.Ba7 O-O 21.Bxb8 Rxb8
22.Bb5 Rxb5 23.Qxa4 Rb8 24.Qxc6 Bxc6
25.Rg1 Bxd5 26.exd5 Ra8 27.a3 Ra4
28.Kd2 Rh4 29.Rg2 (2.107.826.417) 478

25.01 91:27 +0.48 16.Rd2 Bd7 17.Qa5 Qc6 18.Bxa6 Rb8
19.Rd5 Be7 20.Ba7 O-O 21.Bxb8 Rxb8
22.Bb5 Rxb5 23.Qxa4 Rb8 24.Qxc6 Bxc6
25.Rg1 Bxd5 26.exd5 Ra8 27.a3 Ra4
28.Kd2 Rh4 29.Rg2 (2.593.182.802) 472

26.01 116:46 +0.28-- 16.Rd2 Bd7 17.Qa5 Qc6 18.Bxa6 Ra8
19.Bb5 Qxe4 20.Bxd7+ Kxd7 21.Qb5+ Qc6
22.Qxc6+ Kxc6 23.Rf1 Nb6 24.Bxb6 Kxb6
25.Rxf7 Rxa2 26.Rdf2 Ra8 27.c4 Kc6
28.Rd2 Ra4 29.Kd1 (3.329.230.242) 475

27.01 260:27 +0.48 16.Rd2 Bd7 17.Qa5 Qc6 18.Bxa6 Ra8
19.Bb5 Qxe4 20.Bxd7+ Kxd7 21.Qb5+ Qc6
22.Qxc6+ Kxc6 23.Rf1 Nb6 24.Bxb6 Kxb6
25.Rxf7 Rxa2 26.Rdf2 Ra8 27.c4 Kc6
28.Rd2 Ra4 29.Kd1 (7.792.538.791) 498

best move: Rd1-d2 time: 521:00.672 min n/s: 505.529 nodes: 15.803.070.490

This is good news because, maybe now, I can adjust the eval a bit hoping it sees the leafpositions earlier. If it just did not like the variation positionally I think it would be harder.

Eelco

The Most Important Novelty of Informant 105, testposition?

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio

Re: The Most Important Novelty of Informant 105, testpositio