Test Position -- Rybka 2.3.2 v CM11

[PauloSoare]

Here is a position from a CCRL game in which CM11 and Rybka played a very interesting game. (Sorry, no idea about the hardware or personality settings -- it was posted on the Chessmaster forums).

[d]2rr2k1/p2qbppp/1p2p3/3nP3/2NB4/1P3QP1/P4PKP/2RR4 w - - 0 21

Does your engine play 21.Bxb6 here? If so, what's the eval?

Also, how does your favorite engine evaluate the position after all of the material is off the board after 21.Bxb6 axb6 22.Nxb6 Rxc1 23.Nxd7 Rxd1 24.Qxd1 Rxd7?

[d]6k1/3rbppp/4p3/3nP3/8/1P4P1/P4PKP/3Q4 w - - 0 25

I've never seen a game in which the offsetting material was QPP v RBN, especially with both pawns being connected and passed. But The King managed to win both pawns cleanly, and by the end of the game was going to win at least two more without losing any material at all. Very well played!

Finally, I think Rybka's 7.Bb3 was a poor move. Does anybody know if it was from the opening book?

Here's the full game:

[Event "CCRL 40/40"]
[Site "CCRL"]
[Date "2007.12.21"]
[Round "1.94.230"]
[White "Rybka 2.3.2a 32-bit"]
[Black "Chessmaster 11"]
[Result "0-1"]
[ECO "E15"]

1.d4 Nf6 2.Nf3 e6 3.c4 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bc3 O-O 8.Bg2 d5 9.O-O c5 10.Ne5 Bb7 11.Nd2 Nbd7 12.e3 cxd4 13.exd4 Qc7 14.Rc1 dxc4 15.Ndxc4 Bxg2 16.Kxg2 Nxe5 17.dxe5 Rfd8 18.Qf3 Nd5 19.Rfd1 Rac8 20.Bd4 Qd7 21.Bxb6 axb6 22.Nxb6 Rxc1 23.Nxd7 Rxd1 24.Qxd1 Rxd7 25.Qe2 g6 26.a4 Rb7 27.Qa2 Bb4 28.h4 h5 29.Qc2 Rc7 30.Qb2 Bc3 31.Qe2 Kg7 32.Qd3 Rb7 33.Qc2 Bxe5 34.a5 Bc3 35.a6 Rb6 36.Qe2 Rxb3 37.Qc4 Ra3 38.Kh3 Be5 39.Qe4 Bc7 40.Qd4+ Kg8 41.Qc4 Bb6 42.Kg2 Nc7 43.Qc6 Rxa6 44.Qb7 Kg7 45.Kh3 Ba5 46.Kg2 e5 47.Qe4 Re6 48.f3 Ne8 49.g4 Bb6 50.Qc4 Nf6 51.g5 Ng8 52.Qe4 Ne7 53.Kf1 Nf5 54.Ke1 Be3 55.Qa4 0-1

jm

Good to see you here, John Merlino.


Loop M1-T, QX6600, 4 threads, HT=1Gb.

At the and of depth 23(15:28)

Position 1

13.00 0:01 +0.29 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.a4 Rb8 5.Rd3 Qb4 6.Qe2 Bc5 7.Rc4 Qb7 8.Kg1 Rc8 (10.070.434) 7162
14.01 0:02 +0.16 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.a4 Rb8 5.Rd3 Qb4 6.Qe2 Bc5 7.Qh5 Qa3 8.Rc4 Rc8 (15.773.776) 7367
15.01 0:03 +0.19 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.a4 Rc7 5.Rc4 Qb8 6.Rxd5 exd5 7.Qxd5 Rxc4 8.bxc4 Qc8 (27.823.377) 7327
16.01 0:06 +0.16 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Rxc8+ Qxc8 5.Rd4 Qb8 6.Qe4 Nc3 7.Qc6 Nxa2 8.Ra4 Nb4 (49.979.017) 7285
17.01 0:10 +0.19 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Rxc8+ Qxc8 5.Rd4 Qb8 6.Re4 Bf8 7.a4 Bb4 8.Qd3 Bc3 (77.537.198) 7340
18.01 0:16 +0.16 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Rxc8+ Qxc8 5.Rd4 Qb8 6.Re4 Bf8 7.a4 Bb4 8.Qd3 Bc3 (123.905.255) 7369
19.01 0:52 +0.13 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Kg1 Qb8 5.Rxc8+ Qxc8 6.Qe2 Qc3 7.Rd3 Qc5 8.Qb2 Qc7 (376.108.885) 7168
20.01 1:20 +0.18 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Kg1 Qb8 5.Rxc8+ Qxc8 6.Qe2 Qc3 7.Rd3 Qc5 8.Qb2 Qa5 (589.397.408) 7303
21.01 2:18 +0.14 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Kg1 g6 5.Qe4 Kg7 6.Rc2 Rxc2 7.Qxc2 Bb4 8.Rd4 Qb8 (1.006.299.868) 7280
22.01 4:47 +0.07 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Kg1 g6 5.h4 Qb8 6.Rxc8+ Qxc8 7.Qe2 Bb4 8.Kh2 Qb8 (2.079.307.103) 7235
23.01 12:08 +0.07 1.Bxb6 axb6 2.Nxb6 Qb7 3.Nxc8 Rxc8 4.Rc4 Qa6 5.Qd3 Qa8 6.Rxc8+ Qxc8 7.a4 h6 8.Re1 Bb4 (5.251.072.107) 7206
_____________________________________________________________
Position 2

14.01 0:01 +0.24 1.Qe2 Rb7 2.Qd3 Bb4 3.Qa6 Rc7 4.a3 Bf8 5.b4 Rc3 6.h4 g6 7.Qa8 Kg7 8.h5 gxh5 (13.737.308) 7453
15.01 0:02 +0.19 1.Qe2 Rb7 2.Qd3 Bb4 3.Qa6 Rc7 4.a3 Bf8 5.b4 Rc3 6.h4 g6 7.Qa8 Kg7 8.h5 gxh5 (18.560.319) 7471
16.01 0:04 +0.19 1.Qe2 Rb7 2.Qd3 Bb4 3.Qa6 Rc7 4.a3 Bf8 5.b4 Rc3 6.h4 g6 7.Qa7 Kg7 8.h5 Be7 (30.392.770) 7482
17.01 0:11 +0.07 1.Qe2 Rb7 2.Qd3 Bb4 3.Qa6 Rc7 4.Qe2 Rc3 5.Qe4 Bc5 6.h3 g6 7.h4 Kg7 8.h5 gxh5 (83.389.544) 7495
18.01 0:20 0.00 1.Qe2 g6 2.a4 Kg7 3.a5 Bb4 4.a6 Ra7 5.Qb5 Bf8 6.Qb7 Bc5 7.Qb5 Bf8 8.Qb7 Bc5 (152.930.604) 7523
19.01 0:43 0.00 1.Qe2 g6 2.Qb5 Rc7 3.Qe2 Rd7 4.Qb5 Rc7 5.Qe2 Rd7 6.Qb5 Rc7 7.Qe2 Rd7 8.Qb5 Rc7 (332.295.527) 7568
20.01 1:10 -0.07 1.Qe2 g6 2.h4 Rc7 3.Qd1 h5 4.Qb1 Rc3 5.Qb2 Kg7 6.Kh2 Rc8 7.Qd2 Bb4 8.Qd3 Rc3 (534.457.596) 7557
21.01 3:36 -0.18 1.Qe2 g6 2.h3 Bb4 3.h4 Kg7 4.h5 Nc3 5.Qc2 Nd1 6.Qc1 Rd2 7.a3 Bc3 8.Kg1 Rd5 (1.636.817.585) 7555
22.01 8:04 -0.19 1.Qe2 g6 2.a4 Nb4 3.h4 Rc7 4.Qb5 Rc2 5.h5 gxh5 6.Qe8+ Bf8 7.Qd8 h6 8.a5 Ra2 (3.644.875.368) 7528
23.01 11:14 -0.19 1.Qe2 g6 2.a4 Nb4 3.h4 Rc7 4.Qb5 Rc2 5.h5 gxh5 6.Qe8+ Bf8 7.Qd8 h6 8.a5 Ra2 (5.064.941.005) 7514
________________________________________________________

7. Bc3 is in Rybka II book, as a red move. The best move is 7. Bg2.

N=11
%=45.5
Av=2651
Perf= 2691


Paulo Soares

[pedrox]

[d]2rr2k1/p2qbppp/1p2p3/3nP3/2NB4/1P3QP1/P4PKP/2RR4 w - - 0 21

Bxb6 seems easy

Code: Select all

AICE 0.99.2:
   1	00:00	          21	21	-1,97	Cxb6
   1	00:00	          43	43	-0,42	Cd2
   1	00:00	          81	81	-0,33	Ce3
   1	00:00	         126	12.600	-0,28	Ae3
   1	00:00	         147	14.700	-0,27	Dh5
   2	00:00	         361	36.100	-0,35	Dh5 h6
   3	00:00	       1.495	149.500	-0,21	Dh5 h6 f4
   4	00:00	       7.765	258.833	-0,32	Dh5 Cb4 Td2 Dd5+ f3
   4	00:00	      25.114	627.850	-0,31	Ae3 Ab4 Dh5 De7
   4	00:00	      32.946	549.100	+0,13	Axb6 axb6 Cxb6 Db7
   5	00:00	      43.951	439.510	+0,13	Axb6 axb6 Cxb6 Db7 Cxc8
   6	00:00	      67.579	482.707	+0,13	Axb6 axb6 Cxb6 Db7 Cxc8 Txc8
   7	00:00	     110.955	528.357	+0,18	Axb6 axb6 Cxb6 Db7 Cxc8 Txc8 a4
   8	00:00	     209.618	598.908	+0,30	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7
   9	00:00	     445.135	635.907	+0,39	Axb6 axb6 Cxb6 Cxb6 Txd7 Cxd7 Txc8 Txc8 De4
  10	00:01	     957.233	660.160	+0,33	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rf3 Ac5
  11	00:03	   2.135.233	637.382	+0,43	Axb6 axb6 Cxb6 Txc1 Cxd7 Tc3 Td3 Txd3 Dxd3 Txd7 Rf3
  12	00:07	   4.647.322	663.903	+0,37	Axb6 axb6 Cxb6 Txc1 Cxd7 Tc3 De4 Txd7 Tb1 Ac5 f4 Td8
  13	00:17	  11.596.092	672.237	+0,40	Axb6 axb6 Cxb6 Txc1 Cxd7 Tc3 Td3 Txd3 Dxd3 Txd7 Db5 Td8 a4
  14	01:21	  53.410.822	659.392	+0,38	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rf3 Ab4 De2 Cc3 Dc2 Td1

DanaSah v.3.64 FRC:
   2	00:00	       1.168	116.800	-0,21	Ac3 Db5
   2	00:00	       1.468	146.800	-0,20	Rg1 Ab4
   3	00:00	       2.419	241.900	-0,11	Rg1 Ag5 Tc2
   3	00:00	       3.355	335.500	+0,13	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7
   4	00:00	       5.509	183.633	+0,13	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7
   5	00:00	      10.301	343.366	+0,13	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7
   6	00:00	      20.801	693.366	+0,13	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7
   7	00:00	      39.236	560.514	+0,22	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1
   8	00:00	      67.071	479.078	+0,14	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ac5
   9	00:00	     110.287	525.176	+0,22	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ac5 Dg4
  10	00:00	     191.974	492.241	+0,20	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ac5 Dg4 Td8
  11	00:00	     489.908	690.011	+0,26	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Td8 Dg4 Tc8 a4
  12	00:01	     852.091	796.346	+0,18	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ab4 a4 Tc7 Db1 Tc8
  13	00:01	   1.625.931	874.156	+0,27	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ab4 a4 Tc7 Db1 Tc8 De4
  14	00:02	   2.552.015	850.671	+0,20	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Rg1 Ab4 a4 Tc7 Db1 Tc8 Db2 Ae7
  15	00:05	   4.494.372	856.070	+0,26	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc8 Da6 Td8 Rg1 Ac5 a3
  16	00:07	   6.255.425	834.056	+0,24	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc8 Da6 Tc2 Da8+ Af8 Rg1 Tc1+ Rg2 Tc2
  17	00:13	  10.617.497	816.730	+0,30	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc8 Da6 Td8 Rg1 Ac5 a4 Ad4 De2
  18	00:19	  16.028.289	821.963	+0,26	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc8 Da6 Td8 Da7 Tc8 Db7 Td8 Rg1 Ac5
  19	00:30	  25.240.271	841.342	+0,24	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc8 Da6 Tc2 Da8+ Af8 Rg1 Tc1+ Rg2 Tc2 Rg1 Tc1+ Rg2 Tc2
  20	01:03	  50.929.723	808.408	+0,26	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 Dd4 Tc7 Da4 Tc2 Da8+ Af8 Rg1 Tc1+ Rg2 Tc2 h3 g6 a3 Ce3+ Rg1 Tc1+ Rh2 Cd5
  21	02:11	 102.829.079	784.954	+0,31	Axb6 axb6 Cxb6 Txc1 Cxd7 Txd1 Dxd1 Txd7 De2 Tc7 a4 Ab4 Db5 Tc2 Db8+ Af8 Rg1 Tc1+ Rg2 Tc2 Db7 Ae7 Da8+ Af8 Rg1 g6

[d]6k1/3rbppp/4p3/3nP3/8/1P4P1/P4PKP/3Q4 w - - 0 25

DanaSah play Qe2 and AICE Qd2

Code: Select all

AICE 0.99.2:
   1	00:00	           5	5	-6,32	Dxd5
   1	00:00	          10	10	+0,30	De2
   1	00:00	          18	18	+0,31	Df3
   1	00:00	          59	59	+0,42	a4
   1	00:00	          85	85	+0,43	Rf3
   2	00:00	         186	186	+0,33	Rf3 Ac5
   3	00:00	         576	57.600	+0,45	Rf3 Ac5 a4
   4	00:00	       1.674	167.400	+0,38	Rf3 Ac5 a4 Cf6
   5	00:00	       6.328	632.800	+0,41	Rf3 Ab4 De2 Cc3 Da6
   6	00:00	      26.992	899.733	+0,38	Rf3 Ab4 De2 Cc3 Dc2 Td1
   7	00:00	      78.586	873.177	+0,38	Rf3 Tc7 Dd2 Tc3+ Re4 Ac5 De2 Rf8
   8	00:00	     295.686	924.018	+0,33	Rf3 Tc7 Rg4 Ac5 De2 Cc3 Dc2 Cd5
   9	00:00	     713.447	903.097	+0,33	Rf3 Tc7 Dd2 Cb4 a3 Cd5 Db2 Tc3+ Re4 Ac5
  10	00:02	   2.707.007	923.893	+0,21	Rf3 Tc7 Rg4 Tc3 Dd2 Ac5 De2 Rf8 f4 Re7
  10	00:03	   3.408.192	933.751	+0,25	Dc2 Tc7 Db1 Tc3 h4 Ac5 a4 Rf8 f4 Cb4
  11	00:06	   5.749.655	925.870	+0,25	Dc2 Tc7 Db2 Cb4 a3 Cc2 b4 Ce1+ Rh3 Cf3 a4 Rf8
  11	00:09	   8.906.646	917.265	+0,30	Rf3 Tc7 Rg4 Tc3 h4 Ac5 De2 Rf8 Dd2 Re8 Rg5
  12	00:19	  17.996.243	900.712	+0,16	Rf3 Tc7 Rg4 Tc3 h4 Ac5 De2 Rf8 Dd2 h5+ Rxh5 Tf3 a4
  12	00:22	  20.645.724	898.421	+0,18	Dc2 Tc7 De2 Tc3 Db2 Ac5 h4 Rf8 a4 Re7 a5 Td3
  12	00:49	  43.032.089	878.205	+0,20	Dd2 Tc7 Rf1 Ab4 Db2 Tc8 Db1 Cc3 Dc2 Ta8 a4 Td8
  13	01:16	  65.755.325	865.201	+0,24	Dd2 Tc7 h4 Ab4 Db2 Tc3 Db1 Ac5 a4 Cb4 f4 h5 Db2

DanaSah v.3.64 FRC:
   2	00:00	          90	90	+0,14	Rg1 Ac5
   3	00:00	         252	252	+0,22	Rg1 Ac5 a4
   4	00:00	         726	726	+0,19	Rg1 Tc7 a4 Tc8
   5	00:00	       1.866	1.866	+0,27	Rg1 Tc7 a4 Tc8 Dd4
   6	00:00	       3.898	3.898	+0,18	Rg1 Tc7 a4 Ab4 h3 Tc8
   7	00:00	      11.027	1.102.700	+0,26	Rg1 Tc7 a4 Ab4 h3 Tc8 Dd4
   8	00:00	      17.848	594.933	+0,20	Rg1 Tc7 a4 Ab4 Db1 Tc8 Db2 Ae7
   9	00:00	      39.588	659.800	+0,24	Rg1 Tc7 a4 Ab4 h3 Tc8 h4 h6 De2
  10	00:00	      76.529	637.741	+0,19	Rg1 Tc7 a4 Ab4 h3 Tc8 h4 h6 h5 Ae7
  10	00:00	     165.911	638.119	+0,21	De2 Tc7 a4 Ab4 Da6 g6 a5 Tc2 Da8+ Rg7 a6
  11	00:00	     230.467	622.883	+0,20	De2 Tc7 a4 Ab4 Da6 g6 a5 Tc2 Da8+ Rg7 a6 Ad2
  12	00:00	     384.371	600.579	+0,20	De2 Tc7 a4 Ab4 Da6 g6 De2 Tc1 Db2 Td1 Dc2 Td2
  13	00:01	     821.217	590.803	+0,23	De2 Tc7 a4 Ab4 Da6 g6 De2 h5 Rg1 Tc1+ Rg2 Ae7 Dd2 Tc8
  14	00:06	   3.558.910	547.524	+0,29	De2 Tc7 h4 Tc1 Da6 Tc2 Da8+ Af8 Rg1 g6 a3 Ta2 a4 Ta1+ Rg2 Tc1
  15	00:08	   4.741.666	557.843	+0,27	De2 Tc7 h4 Tc1 Da6 Tc2 Da8+ Af8 Rg1 Te2 f4 Tc2 h5 Tc1+ Rg2 Tc2+ Rg1 g6
  16	00:22	  11.827.337	531.565	+0,31	De2 Tc7 h4 Tc1 a4 Ab4 Da6 g6 h5 Tc3 hxg6 hxg6 Da8+ Rg7 a5 Txb3 a6 Ac5 a7 Tb2
  17	00:57	  30.282.719	531.275	+0,31	De2 Tc7 a4 Tc5 Dd3 g6 h4 Tc3 Dd1 h5 a5 Tc6 g4 hxg4 Dxg4 Ab4 h5 Axa5 hxg6
  18	01:18	  41.216.415	528.415	+0,31	De2 Tc7 a4 Tc5 Dd3 Af8 Dd1 Ae7 h4 h6 De2 Cb4 De4 Cd5 b4 Tc1 b5 Ab4
  19	02:25	  75.578.623	521.231	+0,31	De2 Tc7 a4 Tc5 Dd3 Af8 Dd1 Ae7 h4 h6 De2 Cb4 Dd2 Cd5 a5 Tc6 Rg1 Ac5 h5

[Graham Banks]

Finally, I think Rybka's 7.Bb3 was a poor move. Does anybody know if it was from the opening book?

Yes - it was a move from the Xmas2640.abk opening book which along with the HS-12moves.abk book is one of the two Arena books I rate as best for my CCRL engine v engine testing.

Regards, Graham.

[JVMerlino]

So it appears that every engine that was tested chooses Bxb6 and gives White a small advantage. But the point of this thread was that Rybka lost after playing this move.

Can somebody spend the time to see if Rybka lost the game with a later move, or if this is a very good "avoid 21.Bxb6" test? I went through the entire game and couldn't find any specific place (other than this one) in which Rybka might have made an error that lost the game.

Many thanks,
jm