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Subject: Browsing 6-men tablebases: 127 moves without captures and pawn moves!

Author: Victor Zakharov

Date: 10:36:49 04/28/04

Watching to random 6-men positions I found that 50 moves rule is strongly not
adequite.
In the position below white can capture black knight only after 128 moves
(128.Rxa6). Checkmate is in 137 moves.
Some engines simpy cancel to analyze this after 50 moves!
It is interesting what is the tournament practice.

[D] 4k3/4n3/8/4n3/8/8/3RB3/3K4 w - -

[FEN "4k3/4n3/8/4n3/8/8/3RB3/3K4 w - - 0 1"]

1.Bf1 Kf7 2.Bh3 N7g6 3.Rf2+ Ke7 4.Kd2 Kd6 5.Ke3 Ne7 6.Ke4 N5c6 7.Rd2+
Kc5 8.Rd7 Ng8 9.Rd5+ Kb6 10.Rd1 Nge7 11.Bg2 Kc5 12.Rd7 Kb4 13.Bh1
Kb5 14.Kf4 Kc5 15.Be4 Kb5 16.Kg5 Nc8 17.Kf6 Na5 18.Rc7 Nd6 19.Bd3+
Ndc4 20.Ke6 Kb4 21.Bh7 Nb3 22.Bg8 Nba5 23.Kd5 Kb5 24.Bf7 Kb4
25.Be6 Kb5 26.Ke4 Kb6 27.Rh7 Kc5 28.Rh5+ Kb4 29.Kd3 Nb2+ 30.Kc2
Nbc4 31.Rh4 Kc5 32.Kc3 Ne5 33.Rd4 Nac6 34.Rd5+ Kb6 35.Bf5 Kb7
36.Be4 Kc7 37.Bh1 Ng4 38.Rd2 Nge5 39.Kb3 Ne7 40.Kb4 Kb6 41.Rd6+
N7c6+ 42.Kb3 Kc7 43.Rd5 Ng4 44.Rd2 Kb6 45.Ka4 Ne7 46.Rd7 Nc6
47.Rd6 Nge5 48.Rd5 Kc7 49.Bg2 Kb6 50.Be4 Kc7 51.Kb5 Nf7 52.Kc5
Ncd8 53.Bf5 Nb7+ 54.Kd4 Nfd8 55.Bh3 Nc6+ 56.Ke3 Nd6 57.Rd1 Nc4+
58.Ke4 Nb6 59.Bg2 Na4 60.Ke3 Nd8 61.Bh3 Nb6 62.Kd3 Na4 63.Rd2
Nb6 64.Kc3 Nc6 65.Bg2 Ne5 66.Rd1 Ng6 67.Kb4 Nd7 68.Bh3 Nf6 69.Rf1
Nf4 70.Kc5 Ne4+ 71.Kd4 Ng3 72.Rf3 Kd6 73.Bg4 Nge2+ 74.Ke4 Nd5
75.Rd3 Nec3+ 76.Kd4 Na4 77.Rh3 Nf6 78.Rh6 Ke7 79.Bf5 Nb6 80.Rh3
Nfd7 81.Rh7+ Kd8 82.Bh3 Kc7 83.Rh6 Nf8 84.Bg2 Nfd7 85.Rc6+ Kd8
86.Ke4 Nc8 87.Bf3 Ne7 88.Rc2 Ng6 89.Bh1 Ke8 90.Rd2 Ne7 91.Bg2
Ng8 92.Kf5 Ne7+ 93.Ke6 Nf8+ 94.Kd6 Nf5+ 95.Ke5 Nh4 96.Be4 Kf7
97.Rf2+ Kg7 98.Bd3 Nhg6+ 99.Ke4 Ne7 100.Bb5 Nh7 101.Ke5 Ng6+
102.Kf5 Nh4+ 103.Kg4 Ng6 104.Rf1 Ne7 105.Bd3 Ng6 106.Bb1 Nhf8
107.Ba2 Nh7 108.Bb3 Kh6 109.Rg1 Ne7 110.Bc2 Nf8 111.Re1 Nc6 112.Ba4
Nd4 113.Re4 Nde6 114.Bc2 Nc5 115.Re7 Ng6 116.Ra7 Ne5+ 117.Kf4
Ned7 118.Bf5 Nf6 119.Ra5 Nb3 120.Ra6 Kg7 121.Ke5 Nh5 122.Ra2
Nc5 123.Rc2 Na6 124.Rc4 Nb8 125.Rc7+ Kh6 126.Rc8 Na6 127.Rc6+
Kg5 128.Rxa6 Nf4 129.Rb6 Nh5 130.Rg6+ Kh4 131.Bd3 Nf6 132.Kxf6
Kh3 133.Be4 Kh2 134.Bd5 Kh3 135.Rg2 Kh4 136.Be6 Kh5 137.Rh2#
*

Re: Browsing 6-men tablebases: 127 moves without captures and pawn moves! Mike Byrne 18:59:14 04/28/04
- Re: Browsing 6-men tablebases: 127 moves without captures and pawn moves! margolies,marc 23:56:10 04/28/04
KRBKNN ... and KRNKNN GuyHaworth 16:15:13 04/28/04
- Re: KRBKNN ... and KRNKNN Helmut Conrady 04:06:04 04/29/04
  - Re: KRBKNN ... and KRNKNN Victor Zakharov 06:02:39 04/29/04
    - Re: KRBKNN ... and KRNKNN Vincent Diepeveen 07:32:45 04/29/04
      - Re: KRBKNN ... and KRNKNN Ricardo Gibert 01:52:48 04/30/04
        
        Re: KRBKNN ... and KRNKNN Vincent Diepeveen 11:26:38 04/30/04
        
        Re: KRBKNN ... and KRNKNN Uri Blass 12:36:32 04/30/04
      - Re: KRBKNN ... and KRNKNN Helmut Conrady 07:48:52 04/29/04
        
        Re: KRBKNN ... and KRNKNN Robert Hyatt 12:02:28 04/29/04
        
        Re: KRBKNN ... and KRNKNN Helmut Conrady 12:47:33 04/29/04
        
        Re: KRBKNN ... and KRNKNN Robert Hyatt 20:15:24 04/29/04
        
        Re: KRBKNN ... and KRNKNN Mike S. 10:43:35 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 11:14:14 04/30/04
        
        Re: KRBKNN ... and KRNKNN Robert Hyatt 11:10:48 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 13:14:02 04/29/04
        
        Re: KRBKNN ... and KRNKNN Helmut Conrady 14:17:13 04/29/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 14:33:16 04/29/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 08:42:49 04/29/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 09:57:39 04/29/04
        
        Re: KRBKNN ... and KRNKNN Robert Hyatt 12:06:48 04/29/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 19:02:28 04/29/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 01:44:32 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 07:02:02 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 07:19:35 04/30/04
        
        Re: KRBKNN ... and KRNKNN Victor Zakharov 10:06:30 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 10:31:57 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 10:38:00 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 10:49:35 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 11:17:34 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 11:31:00 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 07:31:49 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 09:01:52 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 10:31:59 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 10:37:00 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 10:41:15 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 10:45:58 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 11:22:27 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 11:37:10 04/30/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 12:32:26 04/30/04
        
        Re: KRBKNN ... and KRNKNN Sune Fischer 10:34:08 04/29/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 11:47:08 04/29/04
        
        Re: KRBKNN ... and KRNKNN margolies,marc 12:00:45 04/29/04
- Re: KRBKNN ... and KRNKNN margolies,marc 23:41:56 04/28/04
6pc egtb: krnknn 178 moves margolies,marc 12:00:46 04/28/04
- Re: 6pc egtb: krnknn 178 moves Victor Zakharov 12:42:35 04/28/04
  - Re: 6pc egtb: krnknn 178 moves Eugene Nalimov 13:47:09 04/28/04
    - Re: 6pc egtb: krnknn 178 moves Helmut Conrady 14:22:28 04/28/04
      - Re: 6pc egtb: krnknn 178 moves Helmut Conrady 14:25:38 04/28/04

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