From the silent but deadly set, a novelty

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Dann Corbit
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Location: Redmond, WA USA
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From the silent but deadly set, a novelty

Post by Dann Corbit » Tue Aug 12, 2008 6:59 pm

This is a position played frequently by strong chess programs, but they are playing the wrong moves (surely, it is a book move and the programs are not searching too deeply).

[d]rn1qk2r/p1pnbppp/bp2p3/3pN3/2PP4/1P4P1/P2BPPBP/RN1QK2R w KQkq - acd 24; acn 1348344954; acs 2584; bm Nxf7; c0 "Analysis by Rybkav2.3.2a.mp.x64 @3600sec@3.0GHz@4threads W512MB hash"; ce 45; pm Nxd7 {168}; pv Nxf7 Kxf7 cxd5 c6 dxe6+ Kxe6 b4 Nf6 Qb3+ Kd7 b5 Bb7 O-O Ke8;

Code: Select all


Analysis from C:\tmp\surprise.epd   
8/11/2008 11:49:00 PM Level: 39600 Seconds
Analyzing engine: Rybka 3 Dynamic

                        
    Searching move: Ne5xf7
    Best move (Rybka 3 Dynamic): Ne5xf7
    identical moves! Found in: 02:58
      2	00:00	         533	32.105	+0.65	c4xd5
      3	00:00	         815	26.080	+0.77	c4xd5
      4	00:00	       1.444	46.208	+0.88	c4xd5
      5	00:00	       4.240	90.453	+0.81	c4xd5 Nd7xe5
      6	00:00	      12.816	119.305	+0.58	Ne5xd7 Qd8xd7 Nb1c3
      7	00:00	      19.829	129.330	+0.49	Ne5xd7 Qd8xd7 Nb1c3 00 c4xd5 c7c6 d5d6 Qd7xd6
      7+	00:00	      26.183	131.428	+0.78	Ne5xf7
      7	00:00	      29.900	139.806	+0.47	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7
      7	00:00	      29.904	139.825	+0.49	Ne5xd7 Qd8xd7 Nb1c3 00 c4xd5 c7c6 d5d6 Qd7xd6
      8	00:00	      34.009	138.745	+0.49	Ne5xd7 Qd8xd7 Nb1c3 00 c4xd5 c7c6 d5d6 Qd7xd6
      9	00:00	      82.460	168.878	+0.41	Ne5xd7 Qd8xd7 c4xd5 e6xd5 Nb1c3 c7c6 00 00
      9	00:01	     191.363	209.130	+0.46	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+
     10	00:01	     289.503	218.299	+0.51	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7f8 Nb1c3 Nd7f6 Bd2e3 Qd8d6 b4b5
     11	00:02	     584.403	238.133	+0.35	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7f8 Nb1c3 Nd7f6 Bd2e3 Ba6b7 00 Qd8d7 Ra1c1 Nb8a6
     11	00:03	     683.280	221.979	+0.42	Ne5xd7 Qd8xd7 Nb1c3 c7c6 00 d5xc4 Bd2f4 00 Qd1d2 f7f6
     12	00:04	     826.788	211.129	+0.38	Ne5xd7 Qd8xd7 00 Nb8c6 c4xd5 e6xd5 Nb1c3 000 Bd2e3 Qd7f5 a2a3 Ba6b7 b3b4
     13	00:08	   1.943.561	243.450	+0.37	Ne5xd7 Qd8xd7 00 c7c6 Bd2f4 00 Nb1d2 Be7d6 Bf4xd6 Qd7xd6 Qd1c2 Nb8d7
     14	00:14	   3.769.900	279.595	+0.36	Ne5xd7 Qd8xd7 00 c7c6 Bd2f4 00 Nb1d2 Be7d6 Bf4xd6 Qd7xd6 Qd1c2 Nb8d7 e2e4
     14	00:31	   9.630.413	319.899	+0.41	Ne5d3 00 00 Nd7f6 Nb1c3 c7c6 Nd3e5 Nf6d7 Ne5f3 d5xc4 Bd2f4 Nd7f6 Nf3e5 Nf6d5
     15	00:32	   9.897.903	311.448	+0.41	Ne5d3 00 00 Nd7f6 Nb1c3 c7c6 Nd3e5 Nf6d7 Ne5f3 d5xc4 Bd2f4 Nd7f6 Nf3e5 Nf6d5
     16	00:50	  13.824.813	280.595	+0.42	Ne5d3 00 00 Nd7f6 Nb1c3 c7c6 Nd3e5 Ba6b7 Bd2f4 Nb8d7 Ne5d3 Ra8c8 Qd1c2 h7h6
     17	01:56	  33.300.743	292.226	+0.36	Ne5d3 00 00 Nd7f6 Nb1c3 c7c6 Nd3e5 d5xc4 Bd2e3 c4xb3 a2xb3 Nf6d5 Ne5xc6 Nb8xc6 Nc3xd5 e6xd5 Ra1xa6 Ra8c8 Qd1d2 Qd8d7
     17+	02:58	  46.109.583	264.636	+0.62	Ne5xf7
     17	05:18	  84.205.278	270.798	+0.57	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+
     18	09:46	 164.491.475	287.246	+0.67	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1c3 Nd7f6 Bd2e3 Ke8f8 00 Ba6b7 Ra1d1 Qd8d6 a2a3 Qd6d7 b4b5 Be7d6 Be3g5 Qd7f7 Qb3b2
     19	16:32	 306.349.119	316.023	+0.67	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1c3 Nd7f6 Bd2e3 Ke8f8 00 Ba6b7 Ra1d1 Qd8d6 a2a3 Qd6d7 b4b5 Be7d6 Be3g5 Qd7f7 Qb3b2
     20	44:11	 783.551.328	302.675	+0.74	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1a3 Nd7f6 00 Qd8xd4 Bd2c3 Qd4g4 Rf1d1 Rh8f8 b4b5 Ba6c8 Na3c4 Bc8e6 Rd1d4 Qg4f5 b5xc6 Nf6d5 Bc3e1 Nd5c7 Qb3e3
     21	1:24:03	1.594.781.702	323.846	+0.74	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1a3 Nd7f6 00 Qd8xd4 Bd2c3 Qd4g4 Rf1d1 Rh8f8 b4b5 Ba6c8 Na3c4 Bc8e6 Rd1d4 Qg4f5 b5xc6 Nf6d5 Bc3e1 Nd5c7 Qb3e3
     22	3:46:02	4.207.592,762	317.711	+0.87	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1a3 Nd7f6 00 Qd8xd4 Bd2c3 Qd4g4 Rf1d1 Ke8f8 b4b5 Ba6c8 b5xc6 Nb8a6 Rd1d4
     23	3:57:14	4.339.361,831	312.177	+0.87	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1a3 Nd7f6 00 Qd8xd4 Bd2c3 Qd4g4 Rf1d1 Ke8f8 b4b5 Ba6c8 b5xc6 Nb8a6 Rd1d4
     24	7:52:36	9.180.373,613	331.523	+0.84	Ne5xf7 Ke8xf7 c4xd5 c7c6 d5xe6+ Kf7xe6 b3b4 Ke6f7 Qd1b3+ Kf7e8 Nb1a3 Nd7f6 00 Qd8xd4 Bd2c3 Qd4g4 Rf1d1 Rh8f8 b4b5 Ba6c8 Na3c4 Bc8e6 Rd1d4 Qg4f5 b5xc6 Nf6d5 Ra1d1 Rf8f6 Bc3e1 Nd5c7 Qb3e3
   8/12/2008 10:49:05 AM, Time for this analysis: 11:00:01, Rated time: 02:58

1 of 1 matching moves
8/12/2008 10:49:06 AM, Total time: 11:00:06 AM
Rated time: 02:58 = 178 Seconds

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