Too high penalty?

Discussion of chess software programming and technical issues.

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lech
Posts: 1136
Joined: Sun Feb 14, 2010 10:02 pm

Too high penalty?

Post by lech »

A time ago, I was watching a game (4’ + 2”).
[d]6k1/1p3qpp/5p2/b2r1b2/5B2/P4N2/1P2QPPP/R5K1 b - - 0 28
SF_171 (White) has a Pawn more and after 28…g5 29.b4 waiting for 29…Bd8. But opponent plays 29…Bxb4 and now SF is wrong 30.axb4 (better 30.Bxg5) gxf4 (=).
[d] 6k1/1p3q1p/5p2/3r1b2/1P3p2/5N2/4QPPP/R5K1 w - - 0 31
SF lost the pawn and all advantage. Why?
Probably, too high penalty, for doubled (x1) isolated (x2) pawns (f6 & f4), was one of possible reasons (40 + 40 + 23).
Now I found it (game 3): http://www.open-chess.org/viewtopic.php?f=3&t=351#p3089
[d] 8/8/8/3B1pk1/2K3p1/5nP1/4RP2/5r2 w - -
SF 1.8 plays 1.Bxf3 ?? gxf3 -+ Again doubled isolated pawns.
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Ralph Stoesser
Posts: 408
Joined: Sat Mar 06, 2010 9:28 am

Re: Too high penalty?

Post by Ralph Stoesser »

The second position is no good example for possibly too high double/isolated pawn penalty. As long as the engine does not see that Bxf3 loses material and the game, she will play it regardless how high the double/isolated pawn penalty is. Apart from this SF 1.8 sees very fast that Bxf3 loses. This blunder can only be played under heavy time pressure.
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lech
Posts: 1136
Joined: Sun Feb 14, 2010 10:02 pm

Re: Too high penalty?

Post by lech »

I found a solution.
The following modern algorithm_of_weak_pawns is short and simple. It based at mobility and safety, fundament properties of each piece, pawns too.
A pawn which is not mobile “(blocked || controlled) && !(pos.attacks_from<PAWN>(s, Us) & theirPawns)” is susceptible to attack (if “!chain”). It needs to say goodbye: candidate, double, isolated, backward and opposed pawns.
It should work better with deep and aggressive pruning. :lol:

Code: Select all

template<Color Us>
Score PawnInfoTable&#58;&#58;evaluate_pawns&#40;const Position& pos, Bitboard ourPawns,
                                    Bitboard theirPawns, PawnInfo* pi&#41; const &#123;
// added 3 variables&#58;
Value penalty_midgame = 25;
Value penalty_endgame = 40;
Score penalty = make_score&#40;penalty_midgame, penalty_endgame&#41;;
      
// changes from the following line to the end of function
b = rank_bb&#40;r&#41; | rank_bb&#40;r + &#40;Us == WHITE ? -1 &#58; 1&#41;);
chain = ourPawns & neighboring_files_bb&#40;f&#41; & b;
passed  = !&#40;theirPawns & passed_pawn_mask&#40;Us, s&#41;) && !&#40;ourPawns & squares_in_front_of&#40;Us, s&#41;);
blocked = &#40;ourPawns | theirPawns&#41; & squares_in_front_of&#40;Us, s&#41; & rank_bb&#40;r + &#40;Us == WHITE ? 1 &#58; -1&#41;);
controlled  = pos.attacks_from<PAWN>&#40;s + pawn_push&#40;Us&#41;, Us&#41; & theirPawns&#41;;
weak = !chain && &#40;blocked || controlled&#41; && !&#40;pos.attacks_from<PAWN>&#40;s, Us&#41; & theirPawns&#41;;  
if &#40;weak&#41;
value -= penalty; 
if &#40;passed&#41;
          set_bit&#40;&&#40;pi->passedPawns&#41;, s&#41;;
&#125;
return value;
&#125;
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lech
Posts: 1136
Joined: Sun Feb 14, 2010 10:02 pm

Re: Too high penalty?

Post by lech »

The first game is won by the new version. :lol: :lol: :lol:

Code: Select all

&#91;Event "Computer chess game"&#93;
&#91;Site ""&#93;
&#91;Date "2010.07.09"&#93;
&#91;Round "?"&#93;
&#91;White "Sfx"&#93;
&#91;Black "Sf"&#93;
&#91;Result "*"&#93;
&#91;ECO "A40"&#93;
&#91;Opening "Queen's Pawn"&#93;
&#91;Time "16&#58;36&#58;25"&#93;
&#91;Variation "Bozo-Indian Defence, Four Pawns Attack"&#93;
&#91;TimeControl "180+2"&#93;
&#91;Termination "normal"&#93;
&#91;PlyCount "148"&#93;
&#91;WhiteType "program"&#93;
&#91;BlackType "program"&#93;

1. e4 &#123;&#40;e2e4 Nb8c6 Ng1f3 Ng8f6 Nb1c3 e7e5 Bf1b5 Bf8d6 OO Nc6d4 d2d3 OO
Bc1g5&#41; +0.36/12 12&#125; Nc6 &#123;&#40;Nb8c6 Nb1c3 Ng8f6 Ng1f3 e7e5 Bf1b5 Bf8d6 OO OO
d2d4 e5xd4 Nf3xd4 a7a6&#41; -0.36/11 6&#125; 2. d4 &#123;&#40;d2d4 e7e6 Ng1f3 d7d5 e4xd5
e6xd5 Bf1d3 Ng8f6 OO Bf8e7 Nb1c3 OO Bc1f4 Bc8e6&#41; +0.52/12 14&#125; Nf6 &#123;&#40;Ng8f6
Nb1c3 e7e6 e4e5 Nf6d5 Nc3xd5 e6xd5 Ng1f3 Bf8e7 Bf1b5 OO OO d7d6 Bc1f4
Bc8f5&#41; -0.44/11 12&#125; 3. d5 &#123;&#40;d4d5 Nc6b8 Nb1c3 e7e6 d5xe6 d7xe6 Qd1xd8+
Ke8xd8 Bc1f4 Nb8d7 OOO Bf8c5 Ng1f3 Bc5xf2 Bf1b5&#41; +1.05/10 5&#125; Ne5 &#123;&#40;Nc6e5
Ng1f3 Ne5xf3+ Qd1xf3 e7e6 Nb1c3 e6xd5 e4xd5 Bf8c5 Bc1e3 Bc5xe3 Qf3xe3+
Qd8e7&#41; -0.36/10 5&#125; 4. f4 &#123;&#40;f2f4 Ne5g6 e4e5 Nf6e4 Bf1d3 Ne4c5 Ng1f3 Nc5xd3+
c2xd3 e7e6 d5xe6 Bf8b4+ Bc1d2 Bb4xd2+ Ke1xd2 Ng6xf4&#41; +0.28/9 12&#125; Ng6
&#123;&#40;Ne5g6 e4e5 Nf6e4 Qd1d4 f7f5 Nb1c3 c7c5 d5xc6/ep d7xc6 Ng1f3 Qd8xd4 Nf3xd4
e7e6&#41; -0.08/11 10&#125; 5. e5 &#123;&#40;e4e5 Nf6g8 Ng1f3 e7e6 Nb1c3 Ng8h6 Nc3e4 Nh6g4
Nf3g5 f7f5 d5xe6 f5xe4 Qd1xg4&#41; +1.01/10 9&#125; Ne4 &#123;&#40;Nf6e4 f4f5 c7c6 f5xg6
h7xg6 Nb1c3 Ne4g3 h2xg3 Rh8xh1 Ng1f3 Qd8b6 Qd1d4 c6xd5 Qd4xb6 a7xb6 Nc3xd5&#41;
-0.80/10 10&#125; 6. f5 &#123;&#40;f4f5 Ng6xe5 Qd1d4 Ne4f6 Qd4xe5 d7d6 Qe5d4 c7c6 d5xc6
b7xc6&#41; +1.69/9 5&#125; c6 &#123;&#40;c7c6 f5xg6 h7xg6 Qd1f3 c6xd5 Nb1c3 Qd8a5&#41; -1.05/11
10&#125; 7. fxg6 &#123;&#40;f5xg6 h7xg6 Qd1d3 c6xd5 Nb1c3 Ne4xc3 b2xc3 e7e6 Ke1d1 Bf8c5
Ng1f3 b7b5 Bc1g5 Qd8a5&#41; +1.93/10 8&#125; hxg6 &#123;&#40;h7xg6 Qd1d3 c6xd5 Nb1c3 Rh8h5
Bf1e2 Rh5xe5 Ng1f3 Re5e6 Nc3xd5 Ne4c5&#41; -1.81/9 5&#125; 8. Qd3 &#123;&#40;Qd1d3 c6xd5&#41;
+2.02/12 11&#125; Qa5+ &#123;&#40;Qd8a5+ Nb1c3 Ne4xc3 Qd3xc3 Qa5xc3+ b2xc3 c6xd5 Bc1e3
e7e6 Ng1f3 d7d6 Ke1d2&#41; -2.02/11 12&#125; 9. Nc3 &#123;&#40;Nb1c3 Ne4xc3 b2xc3 c6xd5 Ng1f3
e7e6 Bc1d2 Bf8a3 c3c4 Qa5c5 Ra1b1 d5xc4 Qd3xc4&#41; +2.02/11 6&#125; Nxc3 &#123;&#40;Ne4xc3
Qd3xc3 Qa5xc3+ b2xc3 c6xd5 Bc1e3 b7b6 OOO Bc8b7 Ng1f3 Ra8c8 Kc1b2 e7e6
Bf1b5 Bf8a3+ Kb2b3 a7a6 Bb5d3 Ba3c5 Be3xc5 Rc8xc5&#41; -1.89/12 9&#125; 10. Qxc3
&#123;&#40;Qd3xc3 Qa5xd5 Ng1f3 d7d6 Bc1e3 Bc8e6 Bf1d3 d6xe5 Qc3xe5 Qd5xe5 Nf3xe5
Rh8h5 Ne5xg6 f7xg6 Bd3xg6+ Be6f7 Bg6xh5 Bf7xh5&#41; +2.18/11 8&#125; Qxc3+ &#123;&#40;Qa5xc3+
b2xc3 c6xd5 Ng1f3 b7b6 Bc1e3 Bc8b7 OOO Ra8c8 Kc1b2 e7e6 Bf1b5 Bf8a3+ Kb2b3
a7a6 Bb5d3 Ba3c5 Be3xc5 Rc8xc5&#41; -1.93/12 5&#125; 11. bxc3 &#123;&#40;b2xc3 c6xd5 Bc1e3
e7e6 Ke1d2 b7b6 Ng1f3 Bf8c5 Bf1b5 Bc5xe3+ Kd2xe3 Bc8b7&#41; +2.38/9 0&#125; cxd5
&#123;&#40;c6xd5 Ng1f3 e7e6 Bc1e3 d7d6 Ke1d2 Bc8d7 Ra1b1 b7b6 Bf1e2 Bf8e7 Be3d4
Ke8f8 c3c4 d6xe5 Nf3xe5 Be7g5+ Bd4e3&#41; -1.85/13 9&#125; 12. Nf3 &#123;&#40;Ng1f3 e7e6
Bc1e3 b7b6 Ke1d2 Bc8b7 Ra1b1 Ra8c8 h2h3 Bf8c5 Be3xc5 Rc8xc5 Bf1b5 Ke8e7&#41;
+2.18/13 6&#125; f6 &#123;&#40;f7f6 Bc1e3 g6g5 OOO g5g4 Nf3e1 f6xe5 Rd1xd5 d7d6 Bf1e2
Bc8d7 Kc1b1 Bd7e6&#41; -1.77/12 10&#125; 13. Be3 &#123;&#40;Bc1e3 g6g5 e5xf6 g7xf6 OOO g5g4
Nf3e1 e7e6 Ne1d3&#41; +2.26/8 4&#125; g5 &#123;&#40;g6g5 OOO e7e6 e5xf6 g7xf6 Bf1b5 g5g4
Nf3d2 Bf8d6 h2h4 a7a6 Bb5d3&#41; -1.85/11 7&#125; 14. exf6 &#123;&#40;e5xf6 g7xf6 OOO b7b6
Bf1e2 e7e6 h2h4 g5xh4 Kc1b2 Bf8c5 Nf3d4&#41; +2.46/10 4&#125; gxf6 &#123;&#40;g7xf6 Nf3d4
a7a6 Bf1e2 e7e5 Nd4f5 d7d6 OO Bc8e6 Be2g4 Ra8c8 Nf5xd6+ Bf8xd6 Bg4xe6
Rc8xc3&#41; -1.69/10 6&#125; 15. O-O-O &#123;&#40;OOO e7e6 h2h4 g5xh4 Kc1b2 b7b6 Bf1b5 Bc8b7
Nf3xh4 Bf8c5 Be3f4&#41; +2.38/11 10&#125; e6 &#123;&#40;e7e6 Bf1e2 b7b6 h2h4 g5xh4 Nf3xh4
Ke8f7 Nh4f3 Bf8a3+ Kc1b1 Bc8b7&#41; -1.93/10 13&#125; 16. h4 &#123;&#40;h2h4 b7b6 h4h5 Bc8b7
Bf1d3 Ra8c8 Kc1b2 e6e5 Bd3f5 Bf8a3+ Kb2b3 e5e4&#41; +2.50/10 4&#125; gxh4 &#123;&#40;g5xh4
g2g3 h4h3 Rh1xh3 Rh8xh3 Bf1xh3 Bf8d6 g3g4 b7b6 Kc1b2&#41; -1.85/9 3&#125; 17. Nxh4
&#123;&#40;Nf3xh4 b7b6 Bf1d3 Bc8b7 Nh4g6 Rh8xh1 Rd1xh1 Bf8a3+ Kc1d2 e6e5 Rh1h7
Ra8c8&#41; +2.30/10 11&#125; b6 &#123;&#40;b7b6 Bf1d3 Rh8g8 Nh4g6 Bf8d6 Kc1b1 Bc8b7 Rh1h7
f6f5 Ng6f4 Bd6xf4 Be3xf4 Rg8xg2&#41; -1.65/10 9&#125; 18. Bd3 &#123;&#40;Bf1d3 Bf8c5 Kc1d2
Bc5xe3+ Kd2xe3 Bc8b7 Nh4g6 Rh8g8 Ke3d2 Ke8f7 Rh1h7+ Rg8g7 Rd1h1 Ra8c8&#41;
+2.22/10 4&#125; Bd6 &#123;&#40;Bf8d6 Nh4g6 Rh8g8 Kc1b1 Bc8b7 Rh1h7 f6f5 Ng6f4 Bd6xf4
Be3xf4 Rg8xg2&#41; -1.65/10 4&#125; 19. Kb2 &#123;&#40;Kc1b2 Rh8g8 Rd1f1 Rg8g3 Be3d4 f6f5
Bd3b5 Ke8d8 Bd4f6+ Kd8c7&#41; +2.46/9 7&#125; Bc5 &#123;&#40;Bd6c5 Bd3g6+ Ke8d8 Be3xc5 b6xc5
Rd1f1 Ra8b8+ Kb2c1 f6f5 Nh4f3 Rh8xh1 Rf1xh1 Bc8a6 Rh1h8+ Kd8c7 Rh8xb8
Kc7xb8&#41; -1.33/10 8&#125; 20. Bd4 &#123;&#40;Be3d4 Ke8f7 Rd1f1 Bc5xd4 c3xd4 Bc8b7 Nh4f3
Rh8xh1 Rf1xh1 Ra8g8 Rh1h7+ Rg8g7 Rh7xg7+ Kf7xg7 Kb2c3 Kg7f7&#41; +2.26/10 5&#125; e5
&#123;&#40;e6e5 Bd4xc5 b6xc5 Nh4f5 Ra8b8+ Kb2c1 Rh8xh1 Rd1xh1 Ke8d8 Rh1h8+ Kd8c7
Kc1d2 Rb8b6 Bd3e2 Bc8b7 Rh8h7 d5d4 g2g4&#41; -1.65/10 6&#125; 21. Bg6+ &#123;&#40;Bd3g6+
Ke8d8 Bd4xc5 b6xc5 Rd1xd5 Ra8b8+ Kb2c1 Bc8b7 Rd5d1 Bb7c6 Rd1f1 Bc6d5 Kc1d2
Bd5xa2 Bg6e4 Ba2c4 Rf1xf6 Kd8e7 Rf6f3&#41; +2.02/10 6&#125; Kd8 &#123;&#40;Ke8d8 Bd4xc5 b6xc5
Rd1xd5 Bc8b7 Rd5d1 Ra8b8 Kb2a3 Bb7c6 Nh4f3 Rh8xh1 Rd1xh1 Kd8e7 Rh1d1 Rb8h8&#41;
-1.41/10 3&#125; 22. Bxc5 &#123;&#40;Bd4xc5 b6xc5 Rd1xd5 Ra8b8+ Kb2c1 Bc8b7 Rd5d1 Kd8c7
Bg6f7 Bb7c6 Rd1f1 Bc6e4 Kc1d2 Rb8b6&#41; +1.85/11 3&#125; bxc5 &#123;&#40;b6xc5 Rd1xd5 Bc8b7
Rd5d1 Ra8b8 Kb2a3 Kd8c7 c3c4 Rb8g8 Bg6f5&#41; -1.45/8 0&#125; 23. Rxd5 &#123;&#40;Rd1xd5
Ra8b8+ Kb2c1 Bc8b7 Rd5d1 Bb7c6 Rd1f1 Bc6d5 Kc1d2 Bd5xa2 Bg6e4 Rb8b1 Rf1xb1
Ba2xb1 Rh1xb1 Rh8xh4&#41; +2.02/11 4&#125; Bb7 &#123;&#40;Bc8b7 Rd5d1 Ra8b8 Kb2c1 Kd8c7 Bg6f5
Bb7c6 Kc1d2 Rh8h5 g2g4 Rh5h8 Rh1h3 d7d5&#41; -1.33/11 3&#125; 24. Rdd1 &#123;&#40;Rd5d1 Ra8b8
Kb2c1 Kd8c7 Rh1h2 Rb8g8 Bg6f5 Bb7c6 Rh2h3 Rg8g5 g2g4 e5e4 Kc1d2 d7d5 Kd2e3&#41;
+1.81/11 9&#125; Rb8 &#123;&#40;Ra8b8 Kb2c1 Kd8c7 Bg6f5 d7d6 Nh4f3 e5e4 Rh1xh8 Rb8xh8
Nf3d2 d6d5 Nd2b3&#41; -1.49/11 5&#125; 25. Kc1 &#123;&#40;Kb2c1 Kd8c7 Bg6f5 d7d6 Rh1h3 Rb8g8
c3c4 Bb7c6 g2g4 Bc6d7 Kc1b2 Bd7xf5 g4xf5&#41; +1.97/11 3&#125; Kc7 &#123;&#40;Kd8c7 Bg6f5
Bb7c6 Rh1h3 d7d5 Nh4g6 Rh8xh3 g2xh3 Kc7d6 h3h4 d5d4 Kc1d2 Bc6d5 c3xd4
c5xd4&#41; -1.37/11 2&#125; 26. Bf5 &#123;&#40;Bg6f5 d7d6 Rh1h3 Rb8g8 c3c4 Bb7c6 Bf5e6 Bc6d7
Be6xg8 Bd7xh3 g2xh3 Rh8xg8&#41; +2.06/11 11&#125; Bc6 &#123;&#40;Bb7c6 Nh4g6&#41; -2.06/12 19&#125;
27. Ng6 &#123;&#40;Nh4g6 Rh8xh1 Rd1xh1 Bc6xg2 Rh1h7 Rb8d8 Rh7f7 Bg2d5 Rf7xf6 d7d6
Bf5e6 Bd5xe6 Rf6xe6&#41; +1.77/10 5&#125; Rxh1 &#123;&#40;Rh8xh1 Rd1xh1 Rb8d8 Rh1h7 Bc6d5
a2a3 Bd5g8 Rh7h2 Bg8e6 Bf5xe6 d7xe6 Rh2h7+ Rd8d7 Rh7xd7+ Kc7xd7 Kc1d2&#41;
-2.10/11 4&#125; 28. Rxh1 &#123;&#40;Rd1xh1 Bc6xg2 Rh1h7 Rb8d8 Rh7f7 Bg2d5 Rf7xf6 d7d6
Bf5e6 Bd5xe6&#41; +1.69/8 0&#125; Rd8 &#123;&#40;Rb8d8 Rh1h7 Bc6xg2 Rh7f7 Bg2d5 Rf7xf6 d7d6
a2a3 Rd8e8 Kc1d2 a7a5 Rf6f8 Re8xf8 Ng6xf8 Kc7c6 Kd2e3&#41; -2.02/11 2&#125; 29. Rh2
&#123;&#40;Rh1h2 Bc6d5 a2a3 Kc7d6 Kc1d2 Bd5e6 g2g4 Rd8g8 Rh2h7 a7a5 Kd2e3 Rg8b8
Ke3e4 Be6d5+ Ke4e3&#41; +2.42/11 3&#125; Bd5 &#123;&#40;Bc6d5 a2a4 Kc7d6 Kc1d2 Bd5e6 g2g4
Be6xf5 g4xf5 Kd6d5 Rh2h4 Kd5d6 Rh4h7 Rd8g8 Kd2e3&#41; -2.22/10 7&#125; 30. a3 &#123;&#40;a2a3
Bd5e6 g2g4 Rd8g8 Rh2h7 Kc7d6 Kc1d2 a7a5 Kd2e3 Rg8b8 c3c4 Rb8b2 Bf5xe6 d7xe6
Ke3d3&#41; +2.54/12 7&#125; Bf7 &#123;&#40;Bd5f7 Kc1d2 Kc7d6 Rh2h7 Bf7e6 g2g4 Rd8g8 Kd2e3
Be6xf5 g4xf5 Rg8b8&#41; -2.22/9 3&#125; 31. Rh6 &#123;&#40;Rh2h6 Bf7c4 Kc1d2 Kc7d6 Ng6h4
Kd6e7 Rh6h7+ Ke7d6 Nh4f3 Bc4e6 Bf5xe6 Kd6xe6&#41; +2.94/10 5&#125; Be6 &#123;&#40;Bf7e6
Bf5xe6 d7xe6 Ng6h4 Rd8f8 Kc1d2 Kc7d6 Kd2e3 Kd6d5 Rh6h7 Rf8g8 Rh7xa7 Rg8g3+
Ke3d2&#41; -2.50/9 3&#125; 32. Nh4 &#123;&#40;Ng6h4 Rd8f8 Kc1d2 a7a5 g2g4 Kc7d6 Kd2e3 c5c4
Nh4f3 Be6xf5 g4xf5 Kd6d5 Nf3d2&#41; +2.90/11 3&#125; Rf8 &#123;&#40;Rd8f8 Bf5xe6 d7xe6 Kc1d2
Kc7d6 Kd2e3 Kd6d5 Nh4f3 Kd5c4 Nf3d2+ Kc4xc3 Nd2e4+ Kc3xc2 Ne4xc5&#41; -2.38/10
4&#125; 33. Kd2 &#123;&#40;Kc1d2 Kc7c6 g2g4 Kc6b5 Kd2d3 Kb5a4 Rh6h7 c5c4+ Kd3e3 Ka4xa3
Bf5xe6 d7xe6 Rh7xa7+ Ka3b2&#41; +2.90/10 3&#125; Kd6 &#123;&#40;Kc7d6 Bf5d3 c5c4 Bd3f5 Kd6c5
Kd2e3 Be6xf5 Nh4xf5 Rf8g8 g2g3&#41; -2.22/9 2&#125; 34. Kd3 &#123;&#40;Kd2d3 c5c4+ Kd3e3
Kd6d5 g2g4 Kd5c5 Nh4f3 Be6xf5 g4xf5 d7d5 Rh6h7 a7a5&#41; +2.74/9 4&#125; c4+ &#123;&#40;c5c4+
Kd3e3 Kd6d5 g2g4 Kd5d6 Nh4f3 Kd6d5 Nf3d2 Be6xf5 g4xf5 d7d6&#41; -2.58/8 2&#125; 35.
Ke4 &#123;&#40;Kd3e4 a7a6 Nh4f3 Be6d5+ Ke4e3 Bd5e6 Bf5xe6 d7xe6 g2g4&#41; +2.98/11 4&#125;
Bd5+ &#123;&#40;Be6d5+ Ke4e3 Bd5c6 Nh4f3 Kd6c5 Rh6h7 Rf8g8 g2g4 a7a6 Rh7h6 Rg8f8&#41;
-2.58/9 2&#125; 36. Ke3 &#123;&#40;Ke4e3 Bd5e6 g2g4 Kd6c5 Nh4f3 Be6xf5 g4xf5 d7d5&#41;
+2.94/6 0&#125; Be6 &#123;&#40;Bd5e6 g2g4 a7a5 Bf5xe6 Kd6xe6 Nh4f3 Ke6d5 Rh6h7 Kd5e6
Ke3e4 d7d5+ Ke4e3&#41; -2.46/10 2&#125; 37. g4 &#123;&#40;g2g4 a7a6 Bf5xe6 d7xe6 Nh4f3 Rf8g8
Rh6xf6 Rg8xg4 Rf6f8 Rg4g2 Rf8d8+ Kd6e7 Rd8d2&#41; +2.94/11 2&#125; a5 &#123;&#40;a7a5 Bf5xe6
d7xe6 Nh4f3 Kd6d5 Rh6h1 Rf8g8 Rh1d1+ Kd5c5 g4g5 f6f5 Nf3xe5 Rg8xg5&#41;
-2.94/10 6&#125; 38. Bxe6 &#123;&#40;Bf5xe6 d7xe6 Nh4f3 Rf8g8 g4g5 f6f5 g5g6 Kd6d5 Nf3g5
Rg8g7 Ng5f7 a5a4 Ke3f3&#41; +3.15/10 3&#125; Kxe6 &#123;&#40;Kd6xe6 Nh4f5 Ke6d5 Nf5g7 Kd5d6
g4g5 Kd6e7 Ke3e4 f6xg5 Ke4xe5 Ke7f7 Ng7f5&#41; -3.19/10 5&#125; 39. Nf5 &#123;&#40;Nh4f5
Ke6d5 Rh6h7 Rf8d8 Ke3f3 a5a4 Rh7f7 Kd5e6 Rf7e7+ Ke6d5 Re7h7 d7d6&#41; +3.27/9
2&#125; Rc8 &#123;&#40;Rf8c8 Ke3f3 Rc8f8 Rh6h7 Rf8f7 Rh7xf7 Ke6xf7 Nf5d6+ Kf7e6 Nd6xc4
a5a4 Nc4b6&#41; -3.23/10 2&#125; 40. Ng7+ &#123;&#40;Nf5g7+ Ke6f7 Ng7h5 Rc8c6 Rh6h7+ Kf7e6
Nh5g7+ Ke6d5 Rh7h6 a5a4 Ng7e8 f6f5 g4g5 Rc6c8 Ne8f6+) +3.63/9 2&#125; Kf7
&#123;&#40;Ke6f7 Ng7h5 Rc8c6 Rh6h7+ Kf7e6 Nh5g7+ Ke6d5 Rh7h6 f6f5 Ng7xf5 Rc6xh6
Nf5xh6 d7d6&#41; -3.27/9 1&#125; 41. Nh5 &#123;&#40;Ng7h5 Rc8c6 Nh5g3 Rc6c7 a3a4 Kf7e7 Ng3f5+
Ke7e6 Rh6h8 Rc7a7 Rh8b8 d7d6&#41; +3.51/10 2&#125; Rc6 &#123;&#40;Rc8c6 Rh6h7+ Kf7e6 Nh5g7+
Ke6d5 Rh7h6 a5a4 Ng7h5 f6f5 g4g5 d7d6 Nh5f6+ Kd5e6 Nf6e4+ Ke6d5 Ne4d2&#41;
-3.27/10 1&#125; 42. Rh7+ &#123;&#40;Rh6h7+ Kf7e6 Nh5g7+ Ke6d5 Rh7h6 a5a4 Ng7e8 f6f5 g4g5
Rc6c8 Ne8f6+ Kd5e6 Nf6e4+ Ke6e7 Ne4d6&#41; +4.00/11 2&#125; Ke6 &#123;&#40;Kf7e6 a3a4 Rc6c8
Rh7h6 Rc8f8 g4g5 Ke6f5 Rh6xf6+ Rf8xf6 Nh5xf6 Kf5xg5 Nf6xd7 Kg5f5 Nd7c5&#41;
-3.91/11 5&#125; 43. Ng7+ &#123;&#40;Nh5g7+ Ke6d5 Rh7h6 f6f5 Ng7xf5 Rc6xh6 Nf5xh6 Kd5e6
g4g5 d7d5 Ke3f3&#41; +4.88/11 8&#125; Kd5 &#123;&#40;Ke6d5 Rh7h1 Kd5d6 Rh1h6 Kd6e7 Rh6h7
Ke7d6 Ng7f5+ Kd6c7 Nf5e7 Rc6e6 Ne7d5+ Kc7d6&#41; -3.75/10 2&#125; 44. Rh6 &#123;&#40;Rh7h6
Rc6c8 Ng7h5 Kd5e6 Rh6xf6+ Ke6e7 Rf6b6 Rc8f8 Ke3e4 Rf8f2 Ke4xe5 Rf2xc2&#41;
+4.92/11 2&#125; a4 &#123;&#40;a5a4 Ng7h5 f6f5 g4g5 Rc6c8 Nh5f6+ Kd5e6 Ke3f3 Ke6e7 Nf6d5+
Ke7f7 Rh6f6+ Kf7g7 Rf6xf5 d7d6&#41; -4.24/10 2&#125; 45. Ne8 &#123;&#40;Ng7e8 f6f5 g4g5 Rc6c8
Rh6h8 Rc8c6 Ne8f6+ Rc6xf6 g5xf6 Kd5e6 Rh8c8 f5f4+ Ke3f3 Ke6xf6 Rc8xc4 Kf6f5
Rc4xa4 d7d5&#41; +5.53/12 4&#125; f5 &#123;&#40;f6f5 g4g5 Rc6c8 Ne8f6+ Kd5e6 Ke3f3 Rc8b8
Nf6g4+ Ke6d5 Ng4e3+ Kd5c5 Ne3xf5 Rb8f8&#41; -4.40/9 1&#125; 46. g5 &#123;&#40;g4g5 Rc6c8
Rh6h8 Rc8c6 Ne8f6+ Rc6xf6 g5xf6 Kd5e6 Rh8d8 d7d6 f6f7 Ke6xf7 Rd8xd6 Kf7e7
Rd6c6 f5f4+ Ke3e4&#41; +5.41/9 1&#125; Rc8 &#123;&#40;Rc6c8 Ne8f6+ Kd5e6 Ke3f3 Rc8b8 Nf6g4+
Ke6d5 Ng4e3+ Kd5c5 Ne3xf5 Rb8b2 g5g6 Rb2xc2 g6g7 Rc2xc3+ Kf3e4&#41; -4.84/10 1&#125;
47. Rh8 &#123;&#40;Rh6h8 Rc8c6 Ne8f6+ Rc6xf6 g5xf6 Kd5e6 Rh8d8 Ke6xf6 Rd8xd7 Kf6e6
Rd7a7 Ke6d5 Ra7a5+ Kd5e6 Ra5xa4&#41; +5.89/11 2&#125; f4+ &#123;&#40;f5f4+ Ke3f3 Rc8c6 Rh8h6
Rc6c8 Ne8f6+ Kd5e6 Kf3e4 f4f3 Nf6d5+ Ke6f7 Rh6f6+ Kf7g7 Rf6xf3 d7d6&#41;
-5.29/9 2&#125; 48. Kf3 &#123;&#40;Ke3f3 Rc8c6 Ne8f6+ Kd5e6 Rh8e8+ Ke6f5 Nf6xd7 Kf5xg5
Re8xe5+ Kg5h6 Re5e4 Rc6d6 Nd7e5 Rd6d2 Re4xc4 Kh6g5 Rc4xf4 Rd2xc2&#41; +6.02/11
2&#125; Rc6 &#123;&#40;Rc8c6 Rh8h6 Rc6c8 Ne8f6+ Kd5e6 Kf3e4 d7d6 Nf6e8+ Ke6e7 Ne8xd6
Rc8g8 Ke4xe5 Rg8xg5+ Ke5xf4&#41; -5.57/10 1&#125; 49. Nf6+ &#123;&#40;Ne8f6+ Kd5e6 Rh8e8+
Ke6f5 Nf6xd7 Kf5xg5 Re8xe5+ Kg5h6 Re5e4 Rc6d6 Nd7e5 Rd6d2 Kf3xf4 Rd2f2+
Kf4e3 Rf2xc2 Re4xc4 Kh6g5 Rc4g4+ Kg5f5&#41; +6.02/11 2&#125; Ke6 &#123;&#40;Kd5e6 Rh8e8+
Ke6f5 Nf6xd7 Kf5xg5 Re8xe5+ Kg5h4 Nd7c5 Rc6g6 Re5e8 Rg6g3+ Kf3xf4 Rg3g4+
Kf4e3 Rg4g2 Re8e4+ Kh4g5 Nc5xa4 Rg2xc2 Re4xc4&#41; -5.89/10 1&#125; 50. Re8+
&#123;&#40;Rh8e8+ Ke6f5 Nf6xd7 Kf5xg5 Re8xe5+ Kg5g6 Kf3xf4 Rc6d6 Re5g5+ Kg6h6 Nd7e5
Rd6d2 Ne5xc4 Rd2f2+ Kf4e3 Rf2xc2&#41; +6.30/10 1&#125; Kf5 &#123;&#40;Ke6f5 Nf6xd7 Kf5xg5
Re8xe5+ Kg5g6 Kf3xf4 Rc6d6 Re5g5+ Kg6h6 Nd7e5 Rd6d2 Rg5g3 Rd2xc2 Ne5xc4
Kh6h5 Rg3g5+ Kh5h4&#41; -5.97/11 2&#125; 51. Nxd7 &#123;&#40;Nf6xd7 Kf5xg5 Re8xe5+ Kg5g6
Kf3xf4 Rc6d6 Re5g5+ Kg6h6 Nd7e5 Rd6d2 Ne5g4+ Kh6h7 Ng4e3 Rd2f2+ Kf4g3 Rf2e2
Kg3f3 Re2h2 Kf3e4 Kh7h6&#41; +6.34/10 1&#125; Kxg5 &#123;&#40;Kf5xg5 Re8xe5+ Kg5h6 Re5e4
Rc6d6 Nd7e5 Rd6d2 Kf3xf4 Rd2xc2 Re4xc4 Kh6h5&#41; -5.93/10 1&#125; 52. Rxe5+
&#123;&#40;Re8xe5+ Kg5h6 Kf3xf4 Rc6d6 Nd7c5 Rd6d2 Re5e4 Rd2xc2 Re4xc4 Kh6g6 Nc5e4
Rc2e2 Rc4xa4&#41; +6.58/10 3&#125; Kh6 &#123;&#40;Kg5h6 Re5e4 Rc6d6 Re4d4 Rd6e6 Rd4xf4 Kh6g5&#41;
-6.22/11 3&#125; 53. Kxf4 &#123;&#40;Kf3xf4 Rc6d6 Nd7c5 Rd6d1 Re5e6+ Kh6g7 Re6a6 Rd1d2
Ra6xa4 Rd2xc2 Ra4xc4 Kg7f6 Nc5e4+ Kf6e6 Rc4c6+ Ke6d5&#41; +6.70/11 3&#125; Rd6
&#123;&#40;Rc6d6 Nd7c5 Rd6d1 Re5e6+ Kh6g7 Re6a6 Rd1d2 Ra6xa4 Rd2xc2 Ra4xc4 Kg7g6&#41;
-6.26/9 1&#125; 54. Nc5 &#123;&#40;Nd7c5 Rd6d2 Re5e4 Rd2f2+ Kf4e5 Rf2xc2 Re4xc4 Kh6g6
Nc5e4 Rc2b2 Rc4xa4 Rb2b5+ Ke5d4&#41; +6.86/11 2&#125; Rd1 &#123;&#40;Rd6d1 Re5e6+ Kh6h5 Re6a6
Rd1f1+ Kf4e5 Rf1f3 Ke5d4 Rf3f4+ Kd4d5 Kh5g4 Ra6xa4&#41; -6.38/9 2&#125; 55. Re6+
&#123;&#40;Re5e6+ Kh6g7&#41; +7.03/9 2&#125; Kh5 &#123;&#40;Kh6h5 Re6a6&#41; -6.62/10 2&#125; 56. Ra6 &#123;&#40;Re6a6
Rd1c1 Ra6xa4 Rc1xc2 Ra4xc4 Rc2a2 Rc4a4 Ra2c2 c3c4&#41; +7.07/9 1&#125; Rc1 &#123;&#40;Rd1c1
Ra6xa4&#41; -6.78/10 2&#125; 57. Rxa4 &#123;&#40;Ra6xa4 Rc1f1+ Kf4e5 Rf1a1 Ke5d5 Ra1a2 Nc5e6
Ra2xc2 Ra4xc4 Rc2f2 a3a4 Rf2f5+ Kd5d6&#41; +7.43/9 1&#125; Ra1 &#123;&#40;Rc1a1 Kf4e5 Kh5g6
Ke5d4 Ra1g1 Kd4xc4 Rg1g2 Kc4d3 Kg6f5&#41; -7.11/9 2&#125; 58. Ne4 &#123;&#40;Nc5e4 Kh5g6
Ra4a6+ Kg6g7&#41; +7.59/9 2&#125; Kg6 &#123;&#40;Kh5g6 Ra4a6+) -7.27/8 2&#125; 59. Ra6+ &#123;&#40;Ra4a6+
Kg6g7 a3a4 Ra1a2 a4a5 Ra2xc2 Ra6f6 Rc2a2 a5a6 Ra2a5 Kf4e3&#41; +7.91/9 2&#125; Kf7
&#123;&#40;Kg6f7 Ne4d6+ Kf7e6 Nd6xc4+ Ke6d5 Nc4e3+ Kd5c5 Ra6a5+ Kc5c6 a3a4 Ra1e1
Ra5h5&#41; -7.43/9 1&#125; 60. Nd6+ &#123;&#40;Ne4d6+ Kf7e6 Nd6xc4+ Ke6d5 Nc4e3+ Kd5c5 Ra6a5+
Kc5b6 Ra5h5 Kb6c6 Ne3c4&#41; +8.16/7 1&#125; Ke6 &#123;&#40;Kf7e6 Nd6xc4+ Ke6d5 Nc4e3+ Kd5c5
Ra6a5+ Kc5c6 c3c4 Ra1h1 Ne3f5 Rh1f1+ Kf4e5 Kc6c7&#41; -7.55/8 1&#125; 61. Nxc4+
&#123;&#40;Nd6xc4+ Ke6d5 Nc4e3+ Kd5c5 c3c4 Ra1h1 Ra6a5+ Kc5c6 Kf4e4 Rh1h4+ Ke4e5
Rh4h3 Ne3d5&#41; +8.40/8 1&#125; Kd5 &#123;&#40;Ke6d5 Nc4e3+ Kd5c5 Ra6a5+ Kc5c6 c3c4 Ra1h1
Ne3f5 Rh1f1+ Kf4e4 Rf1e1+ Nf5e3 Re1e2&#41; -7.59/9 1&#125; 62. Ne3+ &#123;&#40;Nc4e3+ Kd5c5
c3c4 Ra1h1 Ra6a5+ Kc5c6 Ne3f5 Rh1f1+ Kf4e4 Rf1e1+ Nf5e3 Re1h1 Ra5d5 Rh1h4+
Ke4d3 Rh4h3 a3a4&#41; +8.40/9 1&#125; Kc5 &#123;&#40;Kd5c5 c3c4 Ra1h1 Ra6a5+ Kc5c6 Ra5g5
Rh1e1&#41; -7.51/6 0&#125; 63. c4 &#123;&#40;c3c4 Ra1h1 Ra6a5+ Kc5c6 Ne3f5 Rh1d1 a3a4 Rd1f1+
Kf4e4 Rf1e1+ Nf5e3 Re1a1 Ne3d5 Ra1e1+ Ke4d4&#41; +8.60/9 2&#125; Rh1 &#123;&#40;Ra1h1 Ra6a5+
Kc5c6 Ne3f5 Rh1f1+ Kf4e4 Rf1e1+ Nf5e3 Re1h1 Ra5f5 Rh1h4+ Rf5f4 Rh4h3&#41;
-7.63/9 1&#125; 64. Ra5+ &#123;&#40;Ra6a5+ Kc5c6 Ne3f5 Rh1f1+ Kf4e4 Rf1e1+ Ke4d4 Re1d1+
Kd4c3 Rd1a1 Nf5d4+ Kc6b6 Ra5b5+ Kb6c7 Kc3b4 Kc7d6 Rb5d5+ Kd6e7&#41; +8.72/10 3&#125;
Kc6 &#123;&#40;Kc5c6 Ne3f5&#41; -7.79/9 2&#125; 65. a4 &#123;&#40;a3a4 Rh1a1&#41; +8.92/9 3&#125; Ra1 &#123;&#40;Rh1a1
Kf4e4 Kc6b6 Ra5b5+ Kb6a6 Rb5b4 Ka6a5 c2c3 Ra1xa4 c4c5 Ra4a1 Ne3c4+ Ka5a6&#41;
-7.87/9 2&#125; 66. Ke4 &#123;&#40;Kf4e4 Ra1a3 Ne3d5 Ra3g3 Nd5b4+ Kc6c7 Ra5f5 Rg3g4+
Ke4d5 Kc7b6 Nb4d3 Kb6c7&#41; +9.09/10 2&#125; Ra3 &#123;&#40;Ra1a3 Ne3d5 Ra3h3 Ra5b5 Rh3h4+
Ke4d3 Rh4h3+ Kd3d4 Rh3h4+ Kd4c3 Rh4h3+ Kc3b4 Kc6d6 Rb5b6+ Kd6e5&#41; -8.28/9 1&#125;
67. Nd5 &#123;&#40;Ne3d5 Ra3h3 Nd5b4+ Kc6b7 Ra5b5+ Kb7c7 Nb4d5+ Kc7c6 a4a5 Rh3h4+
Ke4d3 Rh4h3+ Kd3d4 Rh3h4+ Kd4c3 Rh4h3+ Kc3d2&#41; +9.17/9 2&#125; Rg3 &#123;&#40;Ra3g3 Ra5b5&#41;
-8.56/9 2&#125; 68. Nb4+ &#123;&#40;Nd5b4+ Kc6d7 Ra5f5 Kd7e6 a4a5 Rg3c3 Rf5f6+ Ke6d7
Ke4d4&#41; +9.49/8 1&#125; Kc7 &#123;&#40;Kc6c7 Ra5f5 Rg3g4+ Rf5f4 Rg4g7 Nb4d5+ Kc7c6 Ke4d4
Rg7g2 Rf4f6+ Kc6d7&#41; -8.64/8 1&#125; 69. Rf5 &#123;&#40;Ra5f5 Rg3g4+ Rf5f4 Rg4g7 c4c5
Kc7b7 a4a5 Rg7e7+ Ke4d4 Re7g7 Nb4d5 Rg7g5&#41; +9.69/9 2&#125; Rg4+ &#123;&#40;Rg3g4+ Rf5f4
Rg4g7 a4a5 Kc7b7 c4c5 Rg7h7 a5a6+ Kb7a7 c5c6 Rh7c7&#41; -8.76/8 1&#125; 70. Rf4
&#123;&#40;Rf5f4 Rg4g7&#41; +10.10/9 3&#125; Rg7 &#123;&#40;Rg4g7 a4a5 Kc7b7 c4c5 Rg7h7 Ke4d5 Rh7h5+
Kd5d4 Rh5h7 a5a6+ Kb7a7 c5c6&#41; -9.13/8 2&#125; 71. Nd5+ &#123;&#40;Nb4d5+ Kc7c6 Ke4d4
Rg7g2 a4a5 Kc6b7 Rf4f6 Rg2g4+ Kd4c3 Rg4g3+ Kc3b4 Rg3g2 Rf6b6+ Kb7a7&#41;
+9.85/8 1&#125; Kc6 &#123;&#40;Kc7c6 Ke4d4 Rg7g2 a4a5 Kc6b7 Rf4f6 Rg2d2+ Kd4c5 Rd2g2&#41;
-9.21/8 2&#125; 72. Kd4 &#123;&#40;Ke4d4 Rg7g2&#41; +10.02/10 2&#125; Rg1 &#123;&#40;Rg7g1 Rf4f6+ Kc6b7
a4a5 Rg1g4+ Kd4c5 Rg4g7 Rf6b6+ Kb7a7 Kc5b5 Rg7d7 Rb6f6 Rd7b7+ Kb5c5 Rb7g7
Kc5d4 Rg7g4+ Rf6f4 Rg4xf4+ Nd5xf4&#41; -9.33/8 1&#125; 73. Rf6+ &#123;&#40;Rf4f6+ Kc6b7&#41;
+10.22/8 1&#125; Kb7 &#123;&#40;Kc6b7 a4a5 Rg1g7 Rf6b6+ Kb7a7 c4c5 Rg7g4+ Kd4d3 Rg4g5
Kd3c4 Rg5g4+) -9.57/8 1&#125; 74. Rf7+ &#123;&#40;Rf6f7+ Kb7b8 a4a5 Rg1a1 Nd5b4 Ra1d1+
Kd4c5 Rd1a1 a5a6 Ra1a5+ Kc5d4&#41; +10.26/7 2&#125; Ka6 &#123;&#40;Kb7a6 c4c5 Rg1g4+ Rf7f4
Rg4g5 c2c4 Ka6a5 c5c6 Rg5g8 c6c7 Rg8c8&#41; -9.85/7 1 Black resigns&#125; *
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Uri Blass
Posts: 10313
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Too high penalty?

Post by Uri Blass »

Ralph Stoesser wrote:The second position is no good example for possibly too high double/isolated pawn penalty. As long as the engine does not see that Bxf3 loses material and the game, she will play it regardless how high the double/isolated pawn penalty is. Apart from this SF 1.8 sees very fast that Bxf3 loses. This blunder can only be played under heavy time pressure.
I disagree

SF1.8 does not play Bxf3 at small depths except depth 5 and it suggests Rb2 at depth 1.

f3 is more advanced pawn then g4 so programs can certainly reject Bxf3 based on evaluation.

New game, Friend mode
8/8/8/3B1pk1/2K3p1/5nP1/4RP2/5r2 w - - 0 1

Analysis by Stockfish 1.8 JA:

1.Re2-b2
² (0.56) Depth: 1 00:00:00
1.Re2-b2 Rf1-c1+ 2.Kc4-d3 Rc1-d1+ 3.Kd3-c4
= (0.24) Depth: 2 00:00:00
1.Re2-a2 Rf1-c1+ 2.Kc4-b4
² (0.40) Depth: 2 00:00:00
1.Kc4-c5 Rf1-d1
² (0.44) Depth: 2 00:00:00
1.Kc4-c5 Rf1-d1 2.Bd5-c4
² (0.44) Depth: 3 00:00:00
1.Kc4-c5 Rf1-c1+ 2.Bd5-c4 f5-f4 3.g3xf4+ Kg5xf4
² (0.28) Depth: 4 00:00:00
1.Re2-c2 Rf1-d1 2.Bd5xf3 g4xf3
² (0.32) Depth: 4 00:00:00
1.Re2-c2 f5-f4 2.Kc4-c5 Rf1-d1 3.Bd5xf3 g4xf3
² (0.40) Depth: 5 00:00:00
1.Bd5xf3 Rf1-c1+ 2.Kc4-d3 g4xf3 3.Re2-e5 Rc1-d1+ 4.Kd3-c4
² (0.68) Depth: 5 00:00:00
1.Bd5xf3 g4xf3
= (0.24) Depth: 6 00:00:00 6kN
1.Re2-c2 f5-f4 2.Kc4-c5 Rf1-d1 3.Rc2-c4 f4xg3 4.f2xg3
² (0.48) Depth: 6 00:00:01 7kN
1.Re2-c2 f5-f4 2.g3xf4+ Kg5xf4 3.Kc4-c5 Nf3-e5 4.Kc5-d6 Rf1-d1
² (0.40) Depth: 7 00:00:01 10kN
1.Re2-c2 f5-f4 2.g3xf4+ Kg5xf4 3.Kc4-c5 Nf3-e1 4.Rc2-d2 Ne1-d3+ 5.Rd2xd3 Rf1xf2 6.Rd3-d4+ Kf4-g5
² (0.48) Depth: 8 00:00:01 21kN
1.Re2-c2 f5-f4 2.g3xf4+ Kg5xf4 3.Kc4-c5 Nf3-e1 4.Rc2-d2 Ne1-d3+ 5.Rd2xd3 Rf1xf2 6.Rd3-d4+ Kf4-g5
² (0.48) Depth: 9 00:00:01 24kN
1.Re2-c2 f5-f4
² (0.40) Depth: 10 00:00:01 35kN
1.Re2-c2 f5-f4 2.g3xf4+ Kg5xf4 3.Kc4-c5 Rf1-a1 4.Rc2-c4+ Kf4-f5 5.Rc4-b4 Ra1-c1+ 6.Kc5-d6 Rc1-d1 7.Rb4-e4
² (0.40) Depth: 10 00:00:01 43kN
1.Re2-c2 f5-f4
² (0.32) Depth: 11 00:00:01 54kN
1.Re2-c2 f5-f4
= (0.24) Depth: 11 00:00:01 104kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-d6 Rc1-d1 3.Re2-b2 Kg5-f6 4.Rb2-a2 Rd1-d2 5.Ra2xd2 Nf3xd2 6.Bd5-c6 Nd2-c4+ 7.Kd6-d5 Nc4-e5
² (0.32) Depth: 11 00:00:01 109kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-d6 Rc1-d1 3.Re2-b2 Kg5-f6 4.Rb2-a2 Rd1-d2 5.Ra2xd2 Nf3xd2 6.Bd5-c6 Nd2-e4+ 7.Bc6xe4 f5xe4 8.Kd6-d5 Kf6-f5
² (0.32) Depth: 12 00:00:01 127kN
1.Kc4-c5 Rf1-c1+
= (0.24) Depth: 13 00:00:01 154kN
1.Kc4-c5 Rf1-c1+
= (0.16) Depth: 13 00:00:02 234kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-b4 Rc1-d1 3.Bd5xf3 g4xf3 4.Re2-c2 Rd1-d7 5.Kb4-a4 Rd7-e7 6.Rc2-c3 Re7-e2 7.Rc3xf3 Re2-d2
= (0.12) Depth: 13 00:00:02 425kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-b4 Rc1-d1 3.Kb4-c5 Rd1-c1+
= (0.00) Depth: 14 00:00:02 682kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-b4 Rc1-d1 3.Kb4-c5 Rd1-c1+
= (0.00) Depth: 15 00:00:03 1320kN
1.Kc4-c5 Rf1-c1+ 2.Kc5-b4 Rc1-d1 3.Kb4-c5 Rd1-c1+
= (0.00) Depth: 16 00:00:05 1499kN

(, 09.07.2010)
Top
lech
Posts: 1136
Joined: Sun Feb 14, 2010 10:02 pm

Re: Too high penalty?

Post by lech »

I think that my proposition (mobility and safety) can be good for this issue, but of course, in the mix with the original variables: doubled, isolated ........ :oops:
It is not easy to do it correctly. :?
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