Three recent chess problems posted here...

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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Three recent chess problems posted here...

Post by Dann Corbit »

[D]8/p1p1r2p/1p5p/2p1r2k/2P1PR1P/5K2/PP6/6R1 w - - bm Rf5+;
[D]r1bqk2r/ppppn1pp/5p2/n7/1bB1PN2/8/PBPP2PP/RN1QK2R w KQkq - bm Bxf6;
[D]2r1k2r/1p2np2/q3p1p1/b2pPnN1/3p1P2/PR3N2/2P3QP/R1B4K b k - bm Rxc2;

Code: Select all

Analysis from C:\tmp\three.epd   
8/3/2009 6:32:09 PM Level: 3600 Seconds
Analyzing engine: Rybka 3

1) Rf5+;                
    Searching move: Rf4-f5
    Best move (Rybka 3): Rf4-f5
    identical moves! Found in: 03:05
      2	00:02	         443	14.176	-0.35	Rf4f6
      3	00:02	       1.883	60.256	-0.24	Rf4f6
      4	00:02	       2.204	70.528	-0.24	Rf4f6
      5	00:02	       4.928	107.367	-0.21	Rf4f6 a7a6
      6	00:02	       7.277	118.280	-0.26	Rf4f6 a7a6 b2b3
      7	00:02	      14.630	159.373	-0.31	Rf4f6 a7a6 b2b3 Re7e6
      8	00:03	      29.083	211.212	-0.26	Rf4f6 a7a6 b2b3 Re7e6 Rf6f7
      9	00:03	      54.278	222.322	-0.16	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5xc4
     10	00:03	      83.173	227.117	-0.07	Rf4f6 a7a6 b2b3 Re7e8 Rg1g4 Re8e6 Rf6f7
     11	00:03	     160.154	223.430	-0.05	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5xc4 b3xc4 Re7e6 Rf6f7 Kh5xh4 Rg1g4+ Kh4h5 Rf7xc7 Re6d6
     12	00:03	     191.022	227.714	-0.07	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5xc4 b3xc4 a6a5 Rg1e1 Re7e8 Rf6f7
     13	00:04	     291.943	217.734	-0.04	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5xc4 b3xc4 a6a5 Rg1e1 Re7e8 Rf6f7 c7c6 Rf7xh7 Re8f8+
     14	00:05	     456.986	217.349	 0.00	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5b4 Rg1e1 a6a5 Kf3f4 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7
     15	00:05	     498.077	215.021	 0.00	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5b4 Rg1e1 a6a5 Kf3f4 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7
     16	00:05	     564.244	206.869	 0.00	Rf4f6 a7a6 b2b3 b6b5 a2a4 b5b4 Rg1e1 a6a5 Kf3f4 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7
     17	00:07	     889.274	204.082	 0.00	Rf4f6 a7a6 b2b3 a6a5 Rg1e1 Re7e8 Rf6f7 c7c6 Kf3f4 Re8e7 Rf7f6 Re7e6 Rf6f7
     18	00:21	   3.544.310	193.866	 0.00	Rf4f6 c7c6 Rg1e1 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6 Re7e6 Rf6f7 Re6e7 Rf7f6
     18+	00:29	   4.727.824	182.010	+0.20	Rg1g2
     18+	01:28	  15.581.824	185.456	+0.80	Rg1g2
     18	03:05	  32.759.553	183.445	+1.25	Rg1g2 Re7d7 Rf4f5+ Re5xf5+ e4xf5 Rd7d4 Rg2g7 Rd4xc4 f5f6 Rc4c1 f6f7 Rc1f1+ Kf3e4 Rf1f2 Ke4d5 c5c4 Kd5e6
     18	03:05	  32.759.684	183.446	+1.54	Rf4f5+ Re5xf5+ e4xf5 a7a6 Kf3f4 Re7e2 f5f6 Re2f2+ Kf4e5 b6b5 c4xb5 a6xb5 Ke5e6
     19	03:07	  33.036.498	183.199	+1.59	Rf4f5+ Re5xf5+ e4xf5 a7a6 Kf3f4 Re7e2 f5f6 Re2f2+ Kf4e5 b6b5 c4xb5 a6xb5 Ke5e6
     20	03:15	  34.508.779	183.014	+1.59	Rf4f5+ Re5xf5+ e4xf5 a7a6 Kf3f4 Re7e2 f5f6 Re2f2+ Kf4e5 b6b5 c4xb5 a6xb5 Ke5e6 Rf2e2+ Ke6d7 Re2f2 Kd7e7 Rf2e2+ Ke7f8 Re2xb2 Kf8g7 Rb2xa2
     21+	04:08	  42.780.028	178.462	+1.79	Rf4f5+
     21+	05:24	  54.128.022	172.249	+1.99	Rf4f5+
     21+	07:21	  73.292.999	170.984	+2.39	Rf4f5+
     21	11:18	 115.890.524	175.542	+3.08	Rf4f5+ Re5xf5+ e4xf5 a7a6 Kf3f4 Re7e2 f5f6 Re2f2+ Kf4e5 c7c6 Rg1g7 Rf2xb2 f6f7 Rb2f2 Ke5e6 Kh5xh4 Rg7xh7 Rf2e2+ Ke6d7 Re2f2 Kd7e8 Rf2e2+ Ke8d8 Re2f2 Kd8e7 Rf2e2+
     22	14:34	 148.677.566	174.715	+3.08	Rf4f5+ Re5xf5+ e4xf5 Re7f7 Kf3f4 Rf7f8 Kf4e5 Rf8e8+ Ke5f6
     23+	17:07	 176.803.384	176.705	+3.28	Rf4f5+
     23+	26:25	 271.258.975	175.516	+3.48	Rf4f5+
     23	39:18	 407.539.118	177.174	+3.79	Rf4f5+ Re5xf5+ e4xf5 Re7f7 Kf3f4 Rf7f8 Kf4e5 Rf8e8+ Ke5f6 Re8e2 Kf6g7 Re2xb2 f5f6 Rb2xa2 Rg1f1 Ra2d2 f6f7 Rd2d7 Rf1f5+ Kh5xh4 Kg7xh6 Rd7d8 f7f8Q Rd8xf8 Rf5xf8
     24	41:46	 434.776.693	177.826	+3.79	Rf4f5+ Re5xf5+ e4xf5 Re7f7 Kf3f4 Rf7f8 Kf4e5 Rf8e8+ Ke5f6 Re8e2 Kf6g7 Re2xb2 f5f6 Rb2xa2 Rg1f1 Ra2d2 f6f7 Rd2d7 Rf1f5+ Kh5xh4 Kg7xh6 Rd7d8 f7f8Q Rd8xf8 Rf5xf8
   8/3/2009 7:32:14 PM, Time for this analysis: 01:00:00, Rated time: 03:05

2) Bxf6;                
    Searching move: Bb2xf6
    Best move (Rybka 3): Qd1-h5
    Not found in: 1:00:00
      2	00:00	       1.032	13.376	-0.29	Bc4d5
      3	00:00	       1.925	24.951	-0.22	Qd1h5+
      4	00:00	       2.329	30.188	-0.15	Qd1h5+
      5	00:00	       2.817	36.514	-0.15	Qd1h5+ g7g6 Qh5e2
      6	00:00	       3.814	35.504	-0.15	Qd1h5+ g7g6 Qh5e2 Ne7c6
      7+	00:00	       5.676	24.732	+0.20	Qd1h5+ g7g6 Qh5e2 Ne7c6 Nf4d5
      7	00:00	       5.678	24.741	+0.20	Qd1h5+ g7g6 Qh5e2 Ne7c6 Nf4d5
      8	00:00	      51.206	104.869	+0.06	Qd1h5+ g7g6 Qh5e2 Rh8f8 OO Na5xc4 Qe2xc4 Bb4d6 Bb2a3 Bd6xa3
      9	00:01	     105.456	128.098	+0.04	Qd1h5+ g7g6 Qh5e2 Rh8f8 OO Na5xc4 Qe2xc4 a7a5 Nb1c3 c7c6 Ra1d1
     10	00:01	     143.422	138.290	+0.04	Qd1h5+ g7g6 Qh5e2 Rh8f8 OO Na5xc4 Qe2xc4 a7a5 Nb1c3 c7c6 Ra1d1
     11+	00:01	     192.229	146.678	+0.24	Qd1h5+
     11+	00:02	     304.305	157.219	+0.44	Qd1h5+
     11	00:03	     470.782	172.603	+0.45	Qd1h5+ g7g6 Qh5b5 Na5xc4 Qb5xc4 a7a5 Bb2xf6 Rh8f8 e4e5 b7b5 Qc4e4 d7d5 Qe4e2
     12	00:06	   1.158.183	197.432	+0.40	Qd1h5+ g7g6 Qh5b5 c7c5 Bc4d5 Na5c6 a2a3 Bb4a5 Qb5xc5 Ba5b6 Qc5c4 Nc6e5 Bb2xe5
     13	00:07	   1.377.601	206.418	+0.40	Qd1h5+ g7g6 Qh5b5 c7c5 Bc4d5 Na5c6 a2a3 Bb4a5 Qb5xc5 Ba5b6 Qc5c4 Nc6e5 Bb2xe5
     14	00:10	   2.121.525	220.328	+0.40	Qd1h5+ g7g6 Qh5b5 c7c5 Bc4d5 Na5c6 a2a3 Bb4a5 Qb5xc5 Ba5b6 Qc5c4 Nc6e5 Bb2xe5 f6xe5 Bd5f7+ Ke8f8 Nf4d3 Ne7c6 g2g3
     15	00:25	   5.786.084	232.433	+0.48	Qd1h5+ g7g6 Qh5b5 Na5xc4 Qb5xc4 a7a5 a2a3 b7b5 Qc4xb5 c7c6 Qb5a4 Bb4c5 Nf4d3 Bc5a7 Bb2xf6 OO e4e5 Qd8e8 Nb1c3 Bc8a6 Nc3e4
     16	00:55	  12.534.048	232.802	+0.61	Qd1h5+ g7g6 Qh5b5 c7c5 Nf4d5 Ne7xd5 Bc4xd5 Na5c6 OO Rh8f8 Nb1a3 a7a6 Qb5d3 Qd8e7
     17	04:27	  69.729.116	267.616	+0.40	Qd1h5+ g7g6 Qh5b5 Ne7c6 Nf4h5 Rh8f8 Rh1f1 Qd8e7 Nh5xf6+ Ke8d8 Bc4e2 Bb4c5 Nf6d5 Rf8xf1+
     18	09:04	 141.578.324	266.198	+0.44	Qd1h5+ g7g6 Qh5b5 Ne7c6 Nf4h5 Rh8f8 OO Qd8e7 Nh5xf6+ Ke8d8 Kg1h1 a7a6 Qb5d5 Na5xc4 Qd5xc4 b7b5 Qc4d5 h7h6 d2d3 Qe7e6 a2a3 Bb4d6 Nb1d2
     19	13:42	 221.504.735	275.869	+0.44	Qd1h5+ g7g6 Qh5b5 Ne7c6 Nf4h5 Rh8f8 OO Qd8e7 Nh5xf6+ Ke8d8 Kg1h1 a7a6 Qb5d5 Na5xc4 Qd5xc4 b7b5 Qc4d5 h7h6 d2d3 Qe7e6 a2a3 Bb4d6 Nb1d2
     20	32:05	 493.454.272	262.523	+0.56	Qd1h5+ g7g6 Qh5b5 Ne7c6 Nf4h5 Rh8f8 OO Qd8e7 Nh5xf6+ Ke8d8 Kg1h1 a7a6 Qb5d5 Na5xc4 Qd5xc4 b7b5 Qc4e2 Bc8b7 d2d3 Bb4c5 Nf6d5 Rf8xf1+ Qe2xf1 Qe7f8 Nb1d2 Nc6b4 Bb2f6+ Kd8c8 Nd5xb4 Bc5xb4 c2c3
     21	42:58	 676.790.864	268.831	+0.56	Qd1h5+ g7g6 Qh5b5 Ne7c6 Nf4h5 Rh8f8 OO Qd8e7 Nh5xf6+ Ke8d8 Kg1h1 a7a6 Qb5d5 Na5xc4 Qd5xc4 b7b5 Qc4e2 Bc8b7 d2d3 Bb4c5 Nf6d5 Rf8xf1+ Qe2xf1 Qe7f8 Nb1d2 Nc6b4 Bb2f6+ Kd8c8 Nd5xb4 Bc5xb4 c2c3
   8/3/2009 8:32:15 PM, Time for this analysis: 01:00:00, Rated time: 1:03:05

3) Rxc2;                
    Searching move: Rc8xc2
    Best move (Rybka 3): Rc8xc2
    identical moves! Found in: 00:00
      2	00:00	           2	62	+2.74	Qa6e2
      3	00:00	           2	62	+2.74	Qa6e2
      4+	00:00	         150	4.654	+2.94	Qa6e2
      4+	00:00	         507	15.732	+3.14	Qa6e2
      4	00:00	         507	15.732	+3.08	Qa6e2
      5	00:00	       1.109	34.412	+3.13	Qa6e2 Qg2xe2
      6	00:00	       1.886	58.523	+2.98	Qa6e2 Qg2xe2 Nf5g3+ Kh1g2
      7	00:00	       7.204	115.264	+3.01	Qa6e2 Qg2xe2 Nf5g3+ Kh1g2 Ng3xe2 Rb3xb7 Rc8xc2 Bc1d2 Ne2xf4+
      8	00:00	      19.454	140.288	+3.06	Qa6e2 Qg2xe2 Nf5g3+ Kh1g2 Ng3xe2 Rb3xb7 Rc8xc2 Bc1d2 Ne2xf4+ Kg2g1 Ba5xd2 Rb7b8+ Ne7c8 Nf3xd2
      9	00:00	      36.867	171.599	+2.89	Qa6e2 Qg2xe2 Nf5g3+ Kh1g2 Ng3xe2 Rb3xb7 Rc8xc2 Bc1d2 Ne2xf4+ Kg2g1 Ba5xd2 Rb7b8+ Ne7c8 Nf3xd2 d4d3 Ra1b1 Rh8h4
      9+	00:00	      45.015	172.641	+3.26	Rc8xc2
      9+	00:00	      71.279	186.674	+3.86	Rc8xc2
      9	00:00	      98.358	195.191	+4.05	Rc8xc2 Qg2g1 b7b6 a3a4 Qa6c4 Ra1b1 d4d3 h2h3
     10+	00:00	     123.011	201.541	+4.25	Rc8xc2
     10	00:01	     144.023	205.117	+4.43	Rc8xc2 Qg2g1 b7b6 Rb3b2 d4d3 Rb2xc2 d3xc2 Bc1b2
     11	00:01	     196.178	214.393	+4.58	Rc8xc2 Qg2g1 b7b6 Rb3b2 d4d3 Rb2xc2 d3xc2 Bc1b2 Qa6d3 a3a4 Ne7c6
     12	00:01	     306.976	221.212	+4.63	Rc8xc2 Qg2g1 b7b6 Rb3b2 d4d3 Rb2xc2 d3xc2 Bc1b2 Qa6d3 h2h3 Ba5c3 Bb2xc3 Qd3xc3 Ra1c1 d5d4
     13+	00:02	     552.470	240.020	+4.83	Rc8xc2
     13+	00:03	     785.954	250.331	+5.03	Rc8xc2
     13	00:03	     811.245	246.429	+5.01	Rc8xc2 Qg2g1 b7b6 Rb3b2 d4d3 Rb2xc2 d3xc2 Bc1b2 Qa6d3 h2h3 Ba5c3 Bb2xc3 Qd3xc3 Ra1c1 d5d4 Qg1f2 d4d3 Qf2xb6 OO
     14	01:05	  15.993.036	251.804	+7.64	Rc8xc2
     15	13:46	 252.152.946	312.580	+8.41	Rc8xc2
     16	49:21	 864.838.947	299.074	+9.05	Rc8xc2
   8/3/2009 9:32:16 PM, Time for this analysis: 01:00:00, Rated time: 1:03:05

2 of 3 matching moves
8/3/2009 9:32:17 PM, Total time: 3:00:08 AM
Rated time: 1:03:05 = 3785 Seconds
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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Three recent chess problems posted here...

Post by Dann Corbit »

I should note that I am not sold on Rybka's analysis for:
[D]r1bqk2r/ppppn1pp/5p2/n7/1bB1PN2/8/PBPP2PP/RN1QK2R w KQkq - bm Bxf6;
yet.

That is because Rybka ground a pound of burger every time it passed through Bxf6. So there is something deep and troubling down that path and it may prove fatal for the opposition eventually.
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