Stockfish does remarkably well on WAC.230

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Dann Corbit
Posts: 12803
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Stockfish does remarkably well on WAC.230

Post by Dann Corbit »

It even includes a transposition of Alex Szabo's refutation in the solution path.

Code: Select all

25) Rb4; id WAC.230;    
    Searching move: Rb7-b4
    Best move (Stockfish64): Rb7-b4
    identical moves! Found in: 01:30
      2	00:00	          65	0	+2.66	a5a4 Kg3f4
      2	00:00	          93	0	+2.94	Rb7f7 f2f4
      3	00:00	         189	189.000	+3.31	Rb7f7 f2f4 a5a4
      4	00:00	         393	393.000	+2.90	Rb7f7 f2f4 a5a4 Kg3f3
      5	00:00	         995	331.666	+3.11	Rb7f7 f2f4 a5a4 Kg3f3 Kc6b5
      6	00:00	       1.361	340.250	+2.70	Rb7f7 f2f4 a5a4 Kg3f3 Kc6b5 Kf3e3
      7	00:00	       5.718	816.857	+3.03	Rb7f7 f2f3 a5a4 Kg3f2 Rf7a7 Bd6c5 Ra7f7
      8	00:00	      16.376	1.637.600	+2.78	Rb7f7 f2f3 a5a4 Kg3f2 Rf7h7 Kf2e3 Rh7h5 Bd6c5 Rh5xg5 Rb2h2
      8	00:00	      19.412	1.617.666	+2.90	a5a4 Kg3f3 Kc6b5 Kf3e3 Rb7h7 Ke3d2 Rh7h2 Kd2e3
      9	00:00	      24.148	1.609.866	+2.90	a5a4 Kg3f3 Kc6b5 Kf3e3 Rb7h7 Ke3d2 Rh7h2 Kd2e3 Bc8d7
     10	00:00	      40.334	2.122.842	+2.94	a5a4 Kg3f3 Kc6b5 Kf3e3 Rb7h7 f2f3 Rh7h5 Rb2g2 Bc8b7 Bd6c5 Rh5h3
     11	00:00	      57.686	2.403.583	+2.94	a5a4 Kg3f3 Kc6b5 Kf3e3 Rb7h7 f2f3 Rh7h5 Rb2g2 Bc8b7 Bd6c5 Rh5h3
     12	00:00	     117.061	3.251.694	+3.03	a5a4 Kg3f3 Rb7h7 Kf3e3 Rh7h5 Ke3f4 Kc6b5 f2f3 Bc8b7 Bd6c5 Bb7c6 Kf4e3 Rh5xg5
     12	00:00	     130.375	3.179.878	+3.11	Rb7f7 f2f3 a5a4 Bd6a3 Rf7f5 Ba3e7 Kc6d7 Be7a3 Rf5xg5+ Kg3f4 Rg5h5 Kf4e3 Rh5h3
     13	00:00	     144.756	3.146.869	+3.07	Rb7f7 f2f3 a5a4 Bd6a3 Rf7f5 Ba3e7 Kc6d7 Be7c5 Rf5xg5+ Kg3f4 Rg5f5+ Kf4e3 Kd7c6 f3f4 Rf5f7
     14	00:00	     186.525	3.215.948	+3.11	Rb7f7 f2f3 a5a4 Bd6a3 Rf7f5 Ba3e7 Kc6d7 Be7c5 Rf5xg5+ Kg3f4 Rg5f5+ Kf4e3 Kd7c6 Rb2g2 Rf5xe5+ d4xe5 Kc6xc5 Rg2xg6
     15	00:00	     391.686	3.878.079	+3.07	Rb7f7 f2f3 a5a4 Bd6a3 Kc6b5 Rb2g2 Bc8b7 Kg3f2 Rf7h7 Kf2e3 Rh7h1 Ba3b2 Rh1h3 Bb2a3 Rh3h5 Ba3c5 Bb7c6 Rg2g1
     16	00:00	   1.572.034	5.154.209	+3.07	Rb7f7 f2f3 Kc6b5 Bd6a3 Rf7f5 Kg3g4 Kb5a4 Ba3c5 Rf5f7 Rb2h2 Rf7b7 Rh2b2 Rb7h7 Kg4f4 Ka4b5 Bc5a3 a5a4 Rb2g2 Rh7h1 Ba3b2 Bc8d7 Kf4e3 Rh1h3 Bb2a3
     17	00:00	   2.781.875	5.308.921	+3.07	Rb7f7 f2f3 Kc6b5 Rb2b1 Rf7h7 Bd6a3 a5a4 Rb1g1 Bc8d7 Kg3f2 Rh7h3 Rg1g3 Rh3h5 Rg3g2 Rh5h1 Kf2e3 Rh1f1 Rg2h2
     17+	00:00	   3.076.830	5.332.461	+3.27	Kc6b5 Bd6a3 Rb7h7 Rb2b1 Rh7h5 Kg3f4 Rh5h3 f2f3 a5a4 Kf4e3 Rh3h5 Rb1g1 Rh5h2 Ba3b4 Rh2c2 Ke3f4 Rc2h2 Kf4e3
     18	00:00	   3.620.329	5.339.718	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8d7 Kg3f2 Rh7h3 Rg1g3 Rh3h5 Rg3g1 Rh5h7 Kf2e3 Rh7h2 Rg1b1 Rh2g2 Ba3e7
     18	00:00	   4.332.088	5.381.475	+3.27	a5a4 Bd6a3 Rb7h7 Rb2b1 Rh7h5 Kg3f4 Kc6b5 Rb1g1 Rh5h3 f2f3 Rh3h2 Kf4e3 Rh2a2 Ba3b4 Ra2c2 Ke3f4 Bc8b7 Rg1h1 Rc2g2 Bb4a3 Rg2c2 Ba3b4
     19	00:01	   9.503.558	5.731.940	+2.74	a5a4 Bd6a3 Rb7h7 Rb2b1 Rh7h5 f2f4 Bc8a6 Kg3g2 Rh5h4 Kg2g3 Rh4h8 Kg3g2 Rh8b8 Kg2f3 Rb8b7 Kf3e3 Rb7h7 Ba3c5 Kc6b5 Ke3d2 Rh7h2+ Kd2e3
     19	00:01	   9.636.166	5.725.588	+3.11	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8d7 Kg3f2 Rh7h2+ Rg1g2 Rh2h1 Kf2e3 Rh1d1 Ba3b2 a4a3 Bb2xa3 Rd1d3+ Ke3e2 Rd3xc3
     20	00:01	  10.683.663	5.694.916	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8d7 Kg3f2 Rh7h2+ Rg1g2 Rh2h1 Ba3b2 Rh1h5 Kf2e3 Rh5h3 Bb2a3 Bd7c8 Ba3b2 Bc8d7
     21	00:02	  13.294.547	5.679.003	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8b7 Rg1b1 Rh7h5 Rb1g1 Bb7a6 Kg3g2 Kb5c6 Kg2f2 Ba6b7 Rg1g2 Kc6b5 Kf2e3 Rh5h1 Ke3d2 Bb7c6 Ba3b2 Rh1f1 Kd2e3 Bc6d7 Rg2h2
     22	00:02	  14.985.242	5.642.033	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8b7 Rg1b1 Rh7h5 Rb1g1 Bb7a6 Kg3g2 Kb5c6 Kg2f2 Ba6b7 Rg1g2 Kc6b5 Kf2e3 Rh5h1 Ke3d2 Bb7c6 Ba3b2 Rh1f1 Kd2e3 Bc6d7 Rg2h2
     23	00:03	  18.338.129	5.644.237	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8b7 Rg1b1 Rh7h5 Rb1g1 Bb7a6 Kg3g2 Kb5c6 Kg2f2 Ba6c8 Rg1g2 Kc6b5 Kf2e3 Rh5h3 Ba3b2 Bc8b7 Bb2a3 Rh3h5 Ke3f4 Rh5h1 Ba3b2 Rh1d1 Rg2h2 Rd1d3 Rh2g2 a4a3 Bb2xa3 Rd3xc3 Ba3b2
     24	00:03	  19.169.168	5.636.332	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8b7 Rg1b1 Rh7h5 Rb1g1 Bb7a6 Kg3g2 Kb5c6 Kg2f2 Ba6c8 Rg1g2 Kc6b5 Kf2e3 Rh5h3 Ba3b2 Bc8b7 Bb2a3 Rh3h5 Ke3f4 Rh5h1 Ba3b2 Rh1d1 Rg2h2 Rd1d3 Rh2g2 a4a3 Bb2xa3 Rd3xc3 Ba3b2
     25	00:03	  21.511.798	5.660.999	+3.07	Kc6b5 Rb2b1 Rb7h7 f2f3 Rh7h5 Bd6e7 a5a4 Rb1g1 Rh5h7 Be7a3 Bc8b7 Rg1b1 Bb7c6 Kg3g2 Kb5a6 Rb1h1 Rh7b7 Rh1b1 Ka6b5 Kg2f2 Rb7f7 Kf2e2 Rf7h7 Ke2e3 Rh7h5 Ba3e7 Rh5h2 Be7a3 Rh2c2 Ba3b2 a4a3 Bb2xa3 Rc2xc3+ Ke3e2 Rc3c2+ Ke2e3
     26-	00:05	  31.308.174	5.804.259	+2.86	Kc6b5 Rb2b1 Rb7f7 Bd6a3 Bc8d7 f2f4 Rf7h7 Kg3g2 Rh7h4 Kg2g3 Rh4h7
     27-	00:13	  80.164.384	6.056.541	+2.06	Kc6b5 Rb2b1 Bc8d7 Bd6a3 Kb5a6 Ba3b2
     27	01:30	 509.882.599	5.610.750	+2.42	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8a8 Qh7f5+ Kg4h5 Qf5xe5 Qa8xa4 d4d3 Qa4g4+ Ke2f2 Qg4h4+ Kf2e3 Qh4h3+ Ke3d2 Qh3g4 Qe5h8+ Kh5g6 Qh8e8+ Kg6f6 Qe8d8+ Ba3e7 Qd8h8+ Kf6g6 e6e5 Qg4g2+ Kd2e3 Qg2g1+ Ke3e2 Qg1g4+
     28	02:52	 969.105.275	5.625.436	+2.66	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8a8 Qh7f5+ Kg4h5 d4d3 Qa8g2+ Ke2d1 Ba3b4 Qf5xe5 Qg2c6 Kd1d2 Qc6xa4 Kd2e3 Qa4a1 Qe5h2+ Kh5g6 c3c2 Qa1e1+ Qh2e2 Bb4d2+ Ke3d4 Qe1c1 Qe2e4+ Kg6h6 Qe4h4+ Kh6g7 Qh4g4 g5g6
     29	04:12	1.417.161.410	5.619.419	+3.23	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8a8 Qh7f5+ Kg4h5 d4d3 Qa8g2+ Qf5f2 Qg2e4+ Qf2e3 Qe4g2+ Ke2d1 Qg2g4+ Qe3e2 g5g6 Qe2xg4+ Kh5xg4 d3d2 g6g7 Kd1c2 g7g8Q d2d1Q+ Kg4f4 Kc2b3 Ba3c5 Qd1f1+ Kf4e3 Qf1h3+ Ke3e2 Qh3h5+ Ke2f2 Qh5h2+ Kf2f3 Qh2xe5 Qg8g1 c3c2 Bc5e3 Qe5h5+ Kf3f4 Qh5f5+ Kf4g3
     30	11:10	3.754.557,297	5.598.685	+3.63	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8a8 Qh7f5+ Kg4h5 d4d3 Qa8g2+ Qf5f2 Qg2e4+ Qf2e3 Qe4g2+ Ke2d1 Qg2g4+ Qe3e2 g5g6 Qe2xg4+ Kh5xg4 d3d2 g6g7 Kd1c2 g7g8Q d2d1Q+ Kg4f4 Kc2b3 Ba3c5 Qd1f1+ Kf4e3 Qf1h3+ Ke3e2 Qh3h5+ Ke2f2 Qh5h2+ Kf2f3 Qh2xe5 Qg8g1 c3c2 Bc5e3 a4a3 Be3c1 Qe5h5+ Kf3f2 a3a2 Qg1g3+ Kb3c4
     31	36:13	12.217.289,139	5.620.795	+3.51	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8c4+ d4d3 Ba3c1 Qh7f5+ Kg4h5 c3c2 Qc4d4 Qf5h3+ Kh5g6 a4a3 Qd4c3 Qh3f5+ Kg6g7 a3a2 Qc3d2+ Ke2f1 Qd2a5 Qf5e4 Qa5xa2 Qe4xe5+ Kg7h6 Kf1e1 g5g6 Qe5h8+ Kh6g5 Qh8d8+ Kg5h5 Ke1d1 Bc1f4 Qd8f6 Qa2a4 d3d2 Bf4xd2 Kd1xd2 Qa4d7+ Kd2e3 Qd7c8 Ke3d3
     32-	56:44	19.096.321,981	5.609.694	+2.86	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6
     33	1:13:22	24.734.232,632	5.618.154	+2.98	Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3 c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Kd4d3 f5xg6 Kd3xe2 g6g7 b3b2 g7g8Q b2b1Q Qg8xc8 Qb1d3+ Kg3h4 Qd3e4+ Kh4h5 Qe4h7+ Kh5g4 d5d4 Qc8c4+ d4d3 Ba3c1 Qh7f5+ Kg4h5 c3c2 Qc4d4 Qf5h3+ Kh5g6 a4a3 Qd4c3 Qh3f5+ Kg6g7 Qf5e4 Qc3d2+ Ke2f1 Bc1xa3 Qe4e2 Qd2f4+ Qe2f2 Qf4a4 Qf2e3 Kg7h6 Qe3h3+ Kh6g7 Kf1e1 Qa4b3 Ke1d1 Qb3c3 Qh3f5 g5g6
   1/2/2010 9:21:03 AM, Time for this analysis: 01:19:59, Rated time: 02:21
Top
BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Stockfish does remarkably well on WAC.230

Post by BBauer »

So you still use these WAC positions? :)
Up to now we do not know a winning continuation for WAC.230.
So what does it mean "something is good at WAC.230" ?
Stockfish with my settings finds Rb4 after 91 sec and changes to a4 after
834 sec.

Code: Select all

20 +327 895 7183540 a4 f3 Rh7 Rb1 Kb5 Ba3 Bb7 Bb2 Rh5 f4 Bc6 Kg2 Rh8 Rf1 Rh4 Kf3 Rh2 Rf2 Rh3+ Ke2 a3 Bxa3 Rxc3 Bb2 Rc2+ Ke3
21 +323 1209 8491446 a4 f3 Rh7 Rb1 Kb5 Ba3 Bb7 Bb2 Rh5 f4 Bc6 Kg2 Rh4 Rf1 Bd7 Kg3 Rh8 Kf3 Rh2 Rf2 Rh3+ Ke2 a3 Bxa3 Rxc3 Bb2 Rc2+ Ke3
22 +323 1456 11203237 a4 f3 Rh7 Rb1 Kb5 Ba3 Rh5 f4 Bb7 Bb2 Bc6 Kg2 Rh4 Rf1 Bd7 Ba3 Bc8 Bb2 Bb7 Kf3 Rh5 Ke3 Rh3+ Ke2 Bc6 Rf3 Rh2+ Rf2 Rh3 Rf3
23 +303 1646 13588991 a4 f3 Rh7 Rb1 Kb5 Ba3 Rh5 f4 Bb7 Kg2 Rh4 Kg3 Rh7 Kg2 Rh4
24 +250 3021 36739452 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Ra8 Rb1 Bc8 Kf3 Bd7 Rh1 Rb8 Bb2 Kb5 Ke3 Ra8 Rh7 a3
25 +226 4356 56990258 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Ra8 Rb1 Bc8 Kf3 Bd7 Rh1 Rb8 Bb2 Kb5 Ba3 Ra8 Rh2 Bc8 Rh8 Ka5
25 +286 9127 138997315 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f4 Kxd4 f5 Kd3 fxg6 Kxe2 g7 b2 g8=Q b1=Q Qxc8 Qg1+ Kf4 Qd4+ Kg3 Qxe5+ Kh4 Qe4+ Kh5 Qh7+ Kg4 Qf5+ Kh5 d4 Kh6 Kd1 Qc4 Qh3+ Kg6 e5 Qxa4+ c2 Kf6 Qh8+ Kf5 d3 g6 Qh5+ Kf6
26 +274 13990 223382804 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f4 Kxd4 f5 Kd3 fxg6 Kxe2 g7 b2 g8=Q b1=Q Qxc8 Qg1+ Kf4 Qd4+ Kg3 Qxe5+ Kh4 Qe4+ Kh5 Qh7+ Kg4 Qf5+ Kh5 d4 Kh6 Kd1 Qc4 Qh3+ Kg6 e5 Qxa4+ c2 Kf6 Qg4 g6 Qf4+ Kg7 Qg5 Qd7 Qe3 Qd6 Ke2
27 +214 83374 1530678819 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f4 Kxd4 f5 Kd3 fxg6 Kxe2 g7 b2 g8=Q b1=Q Qxc8 Qg1+ Kh4 Qh1+ Kg4 Qe4+ Kh5 Qh7+ Kg4 Qf5+ Kh5 c2 Kh6 Qh3+ Kg7 Kd1 Qc5 Qg3 Kf6 Qg4 Qf2 d4 g6
27 +226 83449 1531334890 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Ra8 Rb1 Bc8 Kf3 Bd7 Rh1 Rb8 Rb1 Kb5 Rh1 Ra8 Ke3 Re8 Kd2 Rb8 Bc5
28 +226 84104 1538739046 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Ra8 Rb1 Bc8 Kf3 Bd7 Rh1 Rb8 Rb1 Kb5 Rh1 Ra8 Ke3 Re8 Kd2 Rb8 Rh6 Rg8 Bb2 Bc6
29 +222 86451 1575636585 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Ra8 Rb1 Bc8 Kf3 Bd7 Rh1 Rb8 Rb1 Kb5 Rh1 Rg8 Ke3 Bc8 Kd2 Rg7 Rh6 Bb7 Bc5 Bc6 Kc1
30 +202 89965 1628097729 a4 Ba3 Rh7 Rb1 Rh5 f4 Ba6 Kg2 Rh4 Kg3 Rh8 Kg2 Rb8 Rb2 Bb5 Kg3 Rh8 Rh2 Rxh2 Kxh2 Ba6 Kg2 Kb5 Kf3 Bb7 Ke3
30 +242 140604 2477721682 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Kf4 cxb2 Bxb2 Kc4 Ke3 Kb4 Kd2 a3 Bc3+ Kc4
kind regards
Bernhard
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Dann Corbit
Posts: 12803
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Stockfish does remarkably well on WAC.230

Post by Dann Corbit »

All moves except Rb4 are dead drawn (or lost for the stupid moves).
Rb4 has winning chances, but there is an even deeper refutation that means Rb4 is probably also a draw.

But a program that chooses a move besides Rb4 is not analyzing the position correctly (unless it sees all the way through the very deep refutation to a draw -- I never saw any program that could do that).
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BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Stockfish does remarkably well on WAC.230

Post by BBauer »

Hi Dann,

Not all moves except Rb4 are dead drawn (or lost for the stupid moves).
For example stockfish gives the following line
36 +319 752286 27011781128 Kb5 Rb1 Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2
Here Rb4 is played after Kb5 Rb1 Kc6 Rb2.
So the phrase
"a program that chooses a move besides Rb4 is not analyzing the position correctly"
looks wrong to me.
Clearly stockfish is strong, so strong that it discards Rb4.
kind regards
Bernhard

Code: Select all

24 +278   4833   177508819 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5 
25 +319  14991   538406346 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
26 +262  17753   636608972 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
27 +262  38943  1386181777 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +206  70906  2511252640 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +254  80166  2867549742 Kb5 Rb1  Kc6 Rb2 Rh7 Rb1  Bd7 Ba3 Rh5 f4 Be8 Kg2
29 +234  86788  3091786389 Kb5 Rb1  Kc6 Rb2 Kb5
30 +206 104402  3745532605 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kd7 Kg2
31 +222 114316  4130050604 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
32 +202 150723  5458375197 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
33 +206 210904  7687623288 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+   Kxb5 Ba3 c3 Re2
34 +234 261351  9499974405 Kb5 Rb1  Kc6
35 +185 373137 13539149641 Kb5 Rb1  Kc6 Rb2 a4 Ba3 Rh7 Kg2 Rh5 f4 Rh4 Rf2 
36 +319 752286 27011781128 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2

Code: Select all

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Dann Corbit
Posts: 12803
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Stockfish does remarkably well on WAC.230

Post by Dann Corbit »

BBauer wrote:Hi Dann,

Not all moves except Rb4 are dead drawn (or lost for the stupid moves).
For example stockfish gives the following line
36 +319 752286 27011781128 Kb5 Rb1 Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2
Here Rb4 is played after Kb5 Rb1 Kc6 Rb2.
So the phrase
"a program that chooses a move besides Rb4 is not analyzing the position correctly"
looks wrong to me.
Clearly stockfish is strong, so strong that it discards Rb4.
kind regards
Bernhard

Kb5 is a total waste of time and a dead draw.

Code: Select all

24 +278   4833   177508819 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5 
25 +319  14991   538406346 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
26 +262  17753   636608972 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
27 +262  38943  1386181777 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +206  70906  2511252640 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +254  80166  2867549742 Kb5 Rb1  Kc6 Rb2 Rh7 Rb1  Bd7 Ba3 Rh5 f4 Be8 Kg2
29 +234  86788  3091786389 Kb5 Rb1  Kc6 Rb2 Kb5
30 +206 104402  3745532605 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kd7 Kg2
31 +222 114316  4130050604 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
32 +202 150723  5458375197 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
33 +206 210904  7687623288 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+   Kxb5 Ba3 c3 Re2
34 +234 261351  9499974405 Kb5 Rb1  Kc6
35 +185 373137 13539149641 Kb5 Rb1  Kc6 Rb2 a4 Ba3 Rh7 Kg2 Rh5 f4 Rh4 Rf2 
36 +319 752286 27011781128 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2

Code: Select all

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Dann Corbit
Posts: 12803
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Stockfish does remarkably well on WAC.230

Post by Dann Corbit »

BBauer wrote:Hi Dann,

Not all moves except Rb4 are dead drawn (or lost for the stupid moves).
For example stockfish gives the following line
36 +319 752286 27011781128 Kb5 Rb1 Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2
Here Rb4 is played after Kb5 Rb1 Kc6 Rb2.
So the phrase
"a program that chooses a move besides Rb4 is not analyzing the position correctly"
looks wrong to me.
Clearly stockfish is strong, so strong that it discards Rb4.
kind regards
Bernhard

Code: Select all

24 +278   4833   177508819 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5 
25 +319  14991   538406346 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
26 +262  17753   636608972 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
27 +262  38943  1386181777 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +206  70906  2511252640 Rb4 cxb4 a4 b5+  Kxb5 Ba3 c3 Re2  Kc4 f4 Kxd4 f5
28 +254  80166  2867549742 Kb5 Rb1  Kc6 Rb2 Rh7 Rb1  Bd7 Ba3 Rh5 f4 Be8 Kg2
29 +234  86788  3091786389 Kb5 Rb1  Kc6 Rb2 Kb5
30 +206 104402  3745532605 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kd7 Kg2
31 +222 114316  4130050604 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
32 +202 150723  5458375197 Kb5 Rb1  Kc6 Rb2 Bd7 f4   Be8  Ba3 Rh7  Rb1 Kb5 Kg2
33 +206 210904  7687623288 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+   Kxb5 Ba3 c3 Re2
34 +234 261351  9499974405 Kb5 Rb1  Kc6
35 +185 373137 13539149641 Kb5 Rb1  Kc6 Rb2 a4 Ba3 Rh7 Kg2 Rh5 f4 Rh4 Rf2 
36 +319 752286 27011781128 Kb5 Rb1  Kc6 Rb2 Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2

Code: Select all

Get this binary:
http://cap.connx.com/chess-engines/new- ... dd.exe.bz2

And analyze the position. It has Jeremiah Pennery's draw detection code in it. In other words, it is specially designed to clearly understand positions like this. Then, run it against WAC.230 and examine the output. You will see that there is a wall that can be constructed against any move except Rb4.

P.S.
If you need to analyze a position with long, locked pawn chains, then this is the best binary on earth to do that (better than Rybka, Naum, etc.)
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