Is there a convincing solution for Arasan 4.28?

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Dann Corbit
Posts: 12814
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Is there a convincing solution for Arasan 4.28?

Post by Dann Corbit »

[d]3r2k1/2qn1ppp/8/1pbrp3/pP1N4/P2P2P1/RB2RP1P/4QK2 w - - bm Nxb5; id "arasan4.28";

Code: Select all

11/21/2007 6:22:29 PM Level: 9000 Seconds
Analyzing engine: Rybka v1.2.w32

1) Nxb5; id "arasan4.28 
    Searching move: Nd4xb5
    Best move (Rybka v1.2.w32): Nd4-f3
    Not found in: 2:30:00
      2	00:00	          56	896	-0.27	Nd4xb5
      2	00:00	          64	829	+0.38	b4xc5
      3	00:00	         168	2.177	+0.20	b4xc5
      4	00:01	         568	6.122	+0.21	b4xc5 e5xd4
      5	00:01	       1.312	14.141	+0.16	b4xc5 e5xd4 Re2e8+ Nd7f8
      6	00:01	       3.408	24.576	-0.05	b4xc5 e5xd4 Re2e8+ Nd7f8 Re8xd8
      7	00:01	       6.920	40.960	-0.05	b4xc5 e5xd4 Re2e8+ Nd7f8 Re8xd8 Rd5xd8 Qe1b4
      8	00:01	      15.160	58.141	-0.18	b4xc5 e5xd4 Re2e8+ Nd7f8 Re8xd8 Rd5xd8 Qe1b4 Nf8e6
      9	00:01	      39.960	84.195	-0.19	b4xc5 e5xd4 Re2e8+ Nd7f8 Re8xd8 Rd5xd8 Qe1b4 Nf8e6 Qb4xb5
     10	00:01	      78.840	92.160	-0.22	b4xc5 e5xd4 Re2e8+ Nd7f8 Re8xd8 Rd5xd8 Qe1b4 Nf8e6 Qb4xb5 Qc7xc5
     11	00:02	     206.144	104.656	-0.27	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1
     12	00:04	     379.712	108.157	-0.29	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 g7g6
     13	00:06	     618.264	111.895	-0.27	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 h7h6 Qe1b4
     14	00:12	   1.391.448	118.727	-0.36	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 h7h6 Qe1b4 Qc6b6
     15	00:27	   2.983.344	116.303	-0.35	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 h7h6 Qe1b4 Qc6b6 Rc1d1
     16	00:44	   5.134.536	122.004	-0.37	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 h7h6 Qe1b4 Qc6b6 Rc1d1 Nc5e6
     17	01:16	   8.925.680	121.483	-0.35	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 g7g6 Qe1b4 Qc6b6 Rc1d1 Nc5e6
     18	02:33	  18.897.672	126.839	-0.42	b4xc5 e5xd4 Ra2a1 Qc7c8 c5c6 Qc8xc6 Ra1c1 Nd7c5 Kf1g1 Qc6a8 Qe1d1 Qa8b8 f2f4 b5b4
     18	04:26	  30.535.480	117.867	-0.29	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 Qc7xc5 Bb2xe5 Rf3b3 Ra2c2 Qc5e7 Rc2c7 f7f6 Be5f4 Qe7xe1+
     19	06:05	  40.912.440	114.995	-0.33	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 Rf3b3 Qe1d1 e5e4 Qd1g4 f7f6 Qg4e6+ Kg8f8 Qe6f5 h7h6
     20	11:12	  73.191.296	111.547	-0.28	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 Rf3f5 Qe1e3 h7h5 Kf1g1 Nd7f6 Bb2xe5 Rd8xd2 Be5xc7 Rd2xa2
     21	19:00	 124.964.120	112.308	-0.38	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 h7h6 Bb2xe5 Nd7xe5 Rd2xd8+ Qc7xd8 Qe1xe5 Qd8d3+ Qe5e2 Qd3xe2+
     22	32:25	 216.828.960	114.169	-0.38	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 h7h6 Bb2xe5 Nd7xe5 Rd2xd8+ Qc7xd8 Qe1xe5 Qd8d3+ Qe5e2 Qd3xe2+
     23	1:11:11	 479.779.320	115.051	-0.25	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 h7h6 Kf1g1 Qc7xc5 Qe1d1 e5e4 Bb2d4 Qc5g5 Bd4e3 Rf3xe3
     24	1:52:33	 760.982.760	115.397	-0.25	Nd4f3 Rd5xd3 b4xc5 Rd3xf3 Re2d2 h7h6 Kf1g1 Qc7xc5 Qe1d1 e5e4 Bb2d4 Qc5c7 Ra2c2 Qc7b7
   11/21/2007 8:52:35 PM, Time for this analysis: 02:30:01, Rated time: 2:30:00
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pedrox
Posts: 1056
Joined: Fri Mar 10, 2006 6:07 am
Location: Basque Country (Spain)

Re: Is there a convincing solution for Arasan 4.28?

Post by pedrox »

Code: Select all

FEN: 3r2k1/2qn1ppp/8/1pbrp3/pP1N4/P2P2P1/RB2RP1P/4QK2 w - - 0 1 

DanaSah v.3.41 FRC:
   2	00:00	         276	27.600	+0,75	Cxb5 Db8 bxc5 Dxb5
   3	00:00	         540	54.000	+0,75	Cxb5 Db8 bxc5 Dxb5
   4	00:00	       1.553	155.300	+0,75	Cxb5 Db8 bxc5 Dxb5
   5	00:00	       7.093	709.300	+2,21	Cxb5 Dc6 Cc3 Axf2 Dxf2 Txd3
   6	00:00	      27.920	698.000	-0,56	Cxb5 Dc6 Axe5 Txd3 Rg1 Dxb5 bxc5 Cxc5
   6	00:00	      36.152	903.800	-0,39	bxc5 exd4 Te8+ Cf8 Txd8 Txd8 Db4 Ce6
   7	00:00	      90.697	755.808	-0,50	Cf5 Ad6 Dc3 Db7 Rg1 Tc8 Dd2
   8	00:00	     308.639	791.382	-0,12	Cf5 Af8 Dd2 Dc6 Dg5 Txd3 Dxg7+ Axg7 Ce7+ Rf8 Cxc6
   9	00:00	     423.860	799.735	-0,17	Cf5 Af8 Dd2 Dc6 Dg5 Tc8 Dh5 Ad6 d4
  10	00:01	   1.212.543	847.932	-0,60	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 Dh3+ Rg1 Tc8 Ac3
  11	00:01	   1.567.127	880.408	-0,49	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 g4 Tc8 Db1 Ad6 Rg1
  12	00:03	   3.307.414	908.630	-0,41	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 Dh3+ Rg1 Txd3 Axe5 Ae7 g4
  13	00:05	   5.320.002	967.273	-0,65	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 De6 f4 Txd3 Axe5 Dh3+ Rg1 Ae7
  14	00:13	  12.349.299	914.762	-0,91	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 De6 f4 exf4 Cxd5 Dxd5 Dc7 Dh1+ Rf2 Dxh2+ Rf1
  15	00:25	  22.336.136	893.445	-0,78	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Te8+ Txe8 Dxc1
  16	00:35	  31.148.800	889.965	-0,81	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Dxc1 Axe5 f4
  16	00:42	  38.227.544	910.179	-0,76	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Texb2 Cc5 Cd2 Cb3 Tc2 Db5 Df1 Db7 Cc4
  17	01:09	  62.656.077	908.059	-0,81	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Te8+ Txe8 Dxc1 Af6 Dc6
  18	02:13	 119.723.148	900.174	-1,03	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Db8 Te3 Ag7 Txd3 Txd3 Ta2 Da8 Rg1 Af6 De2 Dd5
  19	04:39	 248.585.552	890.987	-0,67	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Te8 b5 De6 Ted2 Cb6 Td6 Df5 Td8 De6
  20	06:00	 323.246.449	897.906	-0,72	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Tb6 f3 Ce6 Cxe6 fxe6
  21	07:10	 394.279.051	916.928	-0,66	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 f6 Td6 Ta1 Dxa1 Dxd6
  22	14:59	 829.920.188	923.159	-0,68	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Tc3 Td6 Db5 Tdd5 a3 Ce6
  23	28:10	1.617.512.743	957.108	-0,53	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Db5 Cd3 Db8 Te1 Tb5 Te4 Da7
  24	1:25:13	 291.810.020	57.072	-0,67	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Te1 Cf8 Tc2 Db5 Cc5 Cg6 Td2 De8 Dc1 Tf3 Te4 Db5 Dc4
Nxb5, Nf3 and Nf5 seem 3 moves possibles.
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Dann Corbit
Posts: 12814
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Is there a convincing solution for Arasan 4.28?

Post by Dann Corbit »

pedrox wrote:

Code: Select all

FEN: 3r2k1/2qn1ppp/8/1pbrp3/pP1N4/P2P2P1/RB2RP1P/4QK2 w - - 0 1 

DanaSah v.3.41 FRC:
   2	00:00	         276	27.600	+0,75	Cxb5 Db8 bxc5 Dxb5
   3	00:00	         540	54.000	+0,75	Cxb5 Db8 bxc5 Dxb5
   4	00:00	       1.553	155.300	+0,75	Cxb5 Db8 bxc5 Dxb5
   5	00:00	       7.093	709.300	+2,21	Cxb5 Dc6 Cc3 Axf2 Dxf2 Txd3
   6	00:00	      27.920	698.000	-0,56	Cxb5 Dc6 Axe5 Txd3 Rg1 Dxb5 bxc5 Cxc5
   6	00:00	      36.152	903.800	-0,39	bxc5 exd4 Te8+ Cf8 Txd8 Txd8 Db4 Ce6
   7	00:00	      90.697	755.808	-0,50	Cf5 Ad6 Dc3 Db7 Rg1 Tc8 Dd2
   8	00:00	     308.639	791.382	-0,12	Cf5 Af8 Dd2 Dc6 Dg5 Txd3 Dxg7+ Axg7 Ce7+ Rf8 Cxc6
   9	00:00	     423.860	799.735	-0,17	Cf5 Af8 Dd2 Dc6 Dg5 Tc8 Dh5 Ad6 d4
  10	00:01	   1.212.543	847.932	-0,60	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 Dh3+ Rg1 Tc8 Ac3
  11	00:01	   1.567.127	880.408	-0,49	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 g4 Tc8 Db1 Ad6 Rg1
  12	00:03	   3.307.414	908.630	-0,41	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 Dh3+ Rg1 Txd3 Axe5 Ae7 g4
  13	00:05	   5.320.002	967.273	-0,65	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 De6 f4 Txd3 Axe5 Dh3+ Rg1 Ae7
  14	00:13	  12.349.299	914.762	-0,91	Cf5 Af8 Dd2 Cb6 Dc2 Dd7 Ce3 De6 f4 exf4 Cxd5 Dxd5 Dc7 Dh1+ Rf2 Dxh2+ Rf1
  15	00:25	  22.336.136	893.445	-0,78	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Te8+ Txe8 Dxc1
  16	00:35	  31.148.800	889.965	-0,81	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Dxc1 Axe5 f4
  16	00:42	  38.227.544	910.179	-0,76	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Texb2 Cc5 Cd2 Cb3 Tc2 Db5 Df1 Db7 Cc4
  17	01:09	  62.656.077	908.059	-0,81	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Dc6 Rg1 Ag7 Tc1 Dxc1 Te8+ Txe8 Dxc1 Af6 Dc6
  18	02:13	 119.723.148	900.174	-1,03	Cf5 Af8 Ta1 g6 Ch4 Txd3 Axe5 Cxe5 Txe5 Db8 Te3 Ag7 Txd3 Txd3 Ta2 Da8 Rg1 Af6 De2 Dd5
  19	04:39	 248.585.552	890.987	-0,67	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Te8 b5 De6 Ted2 Cb6 Td6 Df5 Td8 De6
  20	06:00	 323.246.449	897.906	-0,72	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Tb6 f3 Ce6 Cxe6 fxe6
  21	07:10	 394.279.051	916.928	-0,66	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 f6 Td6 Ta1 Dxa1 Dxd6
  22	14:59	 829.920.188	923.159	-0,68	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Tc3 Td6 Db5 Tdd5 a3 Ce6
  23	28:10	1.617.512.743	957.108	-0,53	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Tbd2 Cf8 Cc5 Txb4 Txe5 Db5 Cd3 Db8 Te1 Tb5 Te4 Da7
  24	1:25:13	 291.810.020	57.072	-0,67	Cxb5 Dc6 Cc3 Txd3 Rg1 Ad4 Ce4 Axb2 Taxb2 Txa3 Dd1 Tb8 Te1 Cf8 Tc2 Db5 Cc5 Cg6 Td2 De8 Dc1 Tf3 Te4 Db5 Dc4
Nxb5, Nf3 and Nf5 seem 3 moves possibles.
And yet all three seem to have (at least slightly) negative evals.
I am not sure there is any move that even holds the draw.
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jdart
Posts: 4420
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Is there a convincing solution for Arasan 4.28?

Post by jdart »

Pretty much all these tests have been verified correct at long time controls (1-2 hrs/move). But I'll re-run these that seem problematic with the latest Arasan version.

--Jon
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jdart
Posts: 4420
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Is there a convincing solution for Arasan 4.28?

Post by jdart »

Arasan likes Nxb5 best at 1hr/move but it is only 0.4 pawn better than alternatives. I'll consider removing this test.


"arasan4.28" bm Nxb5
result: Nxb5 3600 seconds. score: -0.66 2448276658 nodes. ++ corre
ct
Nxb5 Qc6 Nc3 Rxd3 Kg1 Bb6 Ra1 Nf6 Nd1 Qf3 Ne3 Ne4 Bxe5 Nxf2 Qxf2 Bxe3 Rxe3 Qxe3
Qxe3 Rxe3
result(2): bxc5 3600 seconds. score: -1.06 2421109751 nodes.
** error
bxc5 exd4 Re8+ Nf8 Qe7 Qxe7 Rxe7 Rxc5 Ra1 Rc2 Re2 Rxe2 Kxe2 Ne6 Rb1 Re8 Ba1 Nc5+
Kf3 Rd8 Ke2
result(3): Nf3 3600 seconds. score: -1.19 2527453920 nodes.
** error
Nf3 Rxd3 bxc5 Rxf3 Bxe5 Qc6 Kg1 Nxc5 Rac2 Rfd3 Bc7 Rf8 Re5 Qxc7 Rexc5 Qd6 R5c3
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