On-line engine blitz tourney July

[michiguel]

Code: Select all

:Tourney Players: Round 9 of 9 
:
:     Name              Rating Score Perfrm Upset  Results 
:     ----------------- ------ ----- ------ ------ ------- 
:  1 +Texel             [2173]  7.5  [2165] [   0] +12w +06w =02b =03b +04w +09b =05w +08w +10b 
:  2 -Gaviota           [1950]  7.5  [2188] [ 349] +14w +12b =01w +09w =05b +06w +04b +03w =08b 
:  3 +WaDuuttie         [2011]  6.5  [2067] [ 117] +10w +07w +08b =01w =06b =04w +09b -02b +11w 
:  4 +NightmareX        [2084]  6.0  [2037] [   0] +13w +09w =06b +05w -01b =03b -02w +07b +14w 
:  5 +CraftyRB          [2037]  5.5  [1931] [  68] +17w +08w -09b -04b =02w +14w =01b =11b +13w 
:  6 +Goldbar           [1941]  5.5  [1930] [ 106] +15w -01b =04w +07b =03w -02b +12b =09w +16w 
:  7 +ArasanX           [1827]  5.5  [1890] [  11] +11w -03b +10w -06w +13b =08b +14w -04w +17b 
:  8 -Baron             [1849]  5.0  [1858] [  50] +18w -05b -03w +13b +11b =07w +10w -01b =02w
:  9 +Fizbo             [1853]  4.5  [1846] [ 228] +16w -04b +05w -02b +12b -01w -03w =06b +18b 
: 10 +Capivara          [1655]  4.5  [1763] [  68] -03b =11w -07b +17b +16w +12w -08b +15w -01w 
: 11 -Tinker            [   0]  4.5  [1729] [7178] -07b =10b =13w +15b -08w +18w +17b =05w -03b 
: 12 +Spartacus         [1711]  4.0  [1673] [   0] -01b -02w +18b +14b -09w -10b -06w +16b +15w 
: 13 +rpiStockfish      [1710]  4.0  [1664] [   0] -04b +16w =11b -08w -07w =15b +18b +17w -05b 
: 14 +rpiFruit          [1633]  3.5  [1635] [  24] -02b +15w =16b -12w +17w -05b -07b +18w -04b 
: 15 +Joker             [1537]  3.5  [1544] [ 206] -06b -14b +17w -11w +18b =13w +16w -10b -12b 
: 16 +microMax          [1431]  2.0  [1442] [ 214] -09b -13b =14w +18w -10b =17w -15b -12w -06b
: 17 +NebiyuHG          [1657]  1.5  [1376] [   0] -05b +18w -15b -10w -14b =16b -11w -13b -07w 
: 18 +rpiBikjump        [1284]  0.0  [1272] [   0] -08b -17b -12w -16b -15w -11b -13w -14b -09w 
:
:     Average Rating    1784.9 
:

This game was really interesting. The kind of game you rarely see with humans. Gaviota sacrificed a rook for three pawns and the whole thing went wild. It had the chance to get the exchange back (to make it N v PPP), but did not and preferred to keep increasing the piece activity. The whole thing payed off later. At the end, the move 60. Rh6 was cute.

[pgn]
[Event "ICS rated blitz match"]
[Site "212.114.110.107"]
[Date "2014.07.26"]
[Round "-"]
[White "Gaviota"]
[Black "Goldbar"]
[Result "1-0"]
[WhiteElo "2017"]
[BlackElo "1956"]
[TimeControl "300+1"]
[Annotator "11. -0.14"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.h3 d6
9.c3 Na5 10.Bc2 c5 11.d4
{-0.14/12}
11...Qc7 12.Nbd2
{-0.08/13}
12...cxd4 13.cxd4 Bd7 14.Nf1 Rac8 15.Ne3 Nc6 16.d5 Nb4 17.Bb1
{+0.27/12}
17...a5 18.a3
{+0.38/14 0.1}
18...Na6 19.b4
{+0.39/14}
19...Qb7 20.Bd2
{+0.50/19 21}
20...axb4 21.axb4
{+0.59/17 4}
21...Ra8 22.Qb3
{+0.56/15 11}
22...Nh5 23.Bd3
{+0.60/18 12}
23...Rfc8 24.Ra5
{+0.66/16 10}
24...Bd8 25.Nf5
{+0.81/19 10}
25...Bxa5 26.Nxd6
{+0.83/19 10}
26...Qb8 27.Nxf7
{+0.67/19 9}
27...Re8 28.N7xe5
{+0.94/17 13}
28...Rxe5 29.bxa5
{+1.23/18 4}
29...Nc5 30.Qc2
{+1.26/19}
30...Nxd3 31.Qxd3
{+1.35/20}
31...Qd6 32.Qd4
{+1.49/19 2.2}
32...Ree8 33.e5
{+1.32/18}
33...Qg6 34.e6
{+1.35/18 19}
34...Bc8 35.Ne5
{+1.23/18 8}
35...Qc2 36.Ng4
{+1.58/17}
36...Qg6 37.Re5
{+2.16/18 8}
37...Bxe6 38.dxe6
{+2.16/16}
38...Rad8 39.Qe3
{+2.10/19}
39...Nf6 40.Nxf6+
{+2.23/16 8}
40...Qxf6 41.f4
{+2.10/16 10}
41...h6 42.Kh2
{+2.37/17 17}
42...Qe7 43.Be1
{+2.46/16 6}
43...Rb8 44.Qb3
{+2.57/17 7}
44...Kh8 45.Bb4
{+2.60/15 7}
45...Qc7 46.Qb1
{+2.84/18}
46...Qc4 47.Re4
{+2.73/19 2.6}
47...Qd5 48.e7
{+2.62/18 6}
48...Qf5 49.Qd3
{+2.68/18}
49...Rbc8 50.g4
{+2.75/16 6}
50...Qg6 51.f5
{+2.97/15 6}
51...Qf6 52.Kg3
{+3.01/15}
52...h5 53.Qxb5
{+3.51/13 6}
53...h4+ 54.Kf4
{+3.76/15 5}
54...Qb2 55.Qd3
{+3.91/15 0.7}
55...Kh7 56.g5
{+4.75/13 8}
56...Qh2+ 57.Kg4
{+4.54/16 5}
57...Qg2+ 58.Kh5
{+4.82/17 11}
58...Rh8 59.Re6
{+5.16/17}
59...Kg8+ 60.Rh6
{+5.66/17 3}
60...Rxh6+ 61.gxh6
{+5.66/15 1.1}
61...Qc6 62.Bd6
{+5.73/15 2.6}
62...Qe8+ 63.Kxh4
{+5.57/16 4}
63...Qf7 64.hxg7
{+5.99/13 4}
64...Qf6+ 65.Kg4
{+6.22/16}
65...Qxg7+ 66.Kf4
{+6.36/15}
66...Qh6+ 67.Ke4
{+6.40/13 4}
67...Kh7 68.a6
{+6.87/13 4}
68...Qg5 69.Kd5
{+6.98/13 0.7}
69...Ra8 70.Qe4
{+8.76/14}
70...Qg8+ 71.Kc5
{+9.71/13 4}
71...Rc8+ 72.Kb6
{+10.10/14 4}
72...Qf7 73.a7
{+11.11/13 4}
73...Qb3+ 74.Ka6
{+14.02/14 4}
74...Qa2+ 75.Kb7
{+18.74/17 2.7}
75...Rc4 76.e8=Q
{+18.74/16 1.4}
76...Qb3+ 77.Ka6
{+31.60/15 3}
77...Qa2+ 78.Kb6
{+31.60/16 2.2}
78...Qb2+ 79.Qb5
{+327.46/15 4}
79...Qxb5+ 80.Kxb5
{+327.50/17 2.5}
80...Rxe4 81.a8=Q
{+327.52/17 3}
81...Re1 82.Qa7+
{+327.54/14 3}
82...Kg8 83.f6
{+327.56/13}
83...Rb1+ 84.Bb4 Rg1 85.f7+ Kg7 86.f8=Q+ Kg6 87.Qxg1+ Kh5 88.Qg4#
{Goldbar checkmated}
1-0

[/pgn]

This is easy for engines, but I think it is very instructive for humans.
[D]r1rb2k1/1q1b1ppp/n2p4/Rp1Pp2n/1P2P3/1Q1BNN1P/3B1PP1/4R1K1 w - - 7 25 bm Nf5

Here, Gaviota played Qd4!? rather than the normal Nxe5. The maneuver e5 e6 Ne5-g4 and Re5 (with the idea of Rg5 etc.) is interesting.
[D]r5k1/3b2pp/3q4/Pp1Pr2n/4P3/3Q1N1P/3B1PP1/4R1K1 w - - 1 32

Rh6 is the only move (Kg6 Rh6 checkmate!), and it needed to be taken into account when Gaviota played Kh5 a couple of moves before. Nothing difficult, but the position is nice to see. Of course if gxh6 Qb3+ and mate soon.
[D]2r3kr/4P1p1/4R3/P4PPK/1B5p/3Q3P/6q1/8 w - - 7 60

Miguel

[Maarten Claessens]

Code: Select all

:Tourney Players: Round 9 of 9 
:
:     Name              Rating Score Perfrm Upset  Results 
:     ----------------- ------ ----- ------ ------ ------- 
:  1 +Texel             [2173]  7.5  [2165] [   0] +12w +06w =02b =03b +04w +09b =05w +08w +10b 
:  2 -Gaviota           [1950]  7.5  [2188] [ 349] +14w +12b =01w +09w =05b +06w +04b +03w =08b 
:  3 +WaDuuttie         [2011]  6.5  [2067] [ 117] +10w +07w +08b =01w =06b =04w +09b -02b +11w 
:  4 +NightmareX        [2084]  6.0  [2037] [   0] +13w +09w =06b +05w -01b =03b -02w +07b +14w 
:  5 +CraftyRB          [2037]  5.5  [1931] [  68] +17w +08w -09b -04b =02w +14w =01b =11b +13w 
:  6 +Goldbar           [1941]  5.5  [1930] [ 106] +15w -01b =04w +07b =03w -02b +12b =09w +16w 
:  7 +ArasanX           [1827]  5.5  [1890] [  11] +11w -03b +10w -06w +13b =08b +14w -04w +17b 
:  8 -Baron             [1849]  5.0  [1858] [  50] +18w -05b -03w +13b +11b =07w +10w -01b =02w
:  9 +Fizbo             [1853]  4.5  [1846] [ 228] +16w -04b +05w -02b +12b -01w -03w =06b +18b 
: 10 +Capivara          [1655]  4.5  [1763] [  68] -03b =11w -07b +17b +16w +12w -08b +15w -01w 
: 11 -Tinker            [   0]  4.5  [1729] [7178] -07b =10b =13w +15b -08w +18w +17b =05w -03b 
: 12 +Spartacus         [1711]  4.0  [1673] [   0] -01b -02w +18b +14b -09w -10b -06w +16b +15w 
: 13 +rpiStockfish      [1710]  4.0  [1664] [   0] -04b +16w =11b -08w -07w =15b +18b +17w -05b 
: 14 +rpiFruit          [1633]  3.5  [1635] [  24] -02b +15w =16b -12w +17w -05b -07b +18w -04b 
: 15 +Joker             [1537]  3.5  [1544] [ 206] -06b -14b +17w -11w +18b =13w +16w -10b -12b 
: 16 +microMax          [1431]  2.0  [1442] [ 214] -09b -13b =14w +18w -10b =17w -15b -12w -06b
: 17 +NebiyuHG          [1657]  1.5  [1376] [   0] -05b +18w -15b -10w -14b =16b -11w -13b -07w 
: 18 +rpiBikjump        [1284]  0.0  [1272] [   0] -08b -17b -12w -16b -15w -11b -13w -14b -09w 
:
:     Average Rating    1784.9 
:

WaDuuttie did rather well this time against the multicore monsters.
BTW, I noticed that the top-8 engines all played 5 times the white pieces... amazing.

[hgm]

Indeed. This can only happen when they all play opponents from the lower half in the last round. Which should only happen if they all met each other at an earlier round.

[petero2]

WaDuuttie did rather well this time against the multicore monsters.

Indeed. Texel's new NUMA awareness and speculative transposition table prefetch gave a nice NPS improvement on the 16-core computer, but in the game against WaDuuttie this was not enough:

[pgn]
[White "WaDuuttie"]
[Black "Texel"]
[Result "1/2-1/2"]
[WhiteElo "2018"]
[BlackElo "2175"]
[TimeControl "300+1"]
[Annotator "13. -0.08 11... +0.12"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8.
Nxd4 Bc5 9. Qd2 O-O 10. O-O-O a6 11. Qf2 Bxd4 {+0.12/19 10} 12. Bxd4 Nxd4
{+0.15/21 10} 13. Qxd4 {-0.08/17 9} b5 {+0.20/21 1.4} 14. Kb1 {-0.06/18 10}
Bb7 {+0.05/21 1.1} 15. Bd3 {-0.08/18 8} Rc8 {+0.02/19 10} 16. Ne2
{+0.08/18 15} Qc7 {-0.10/19 10} 17. h4 {+0.04/16 8} Nc5 {-0.07/20 0.9} 18.
Rhe1 {+0.22/16 1.1} Rfe8 {-0.26/18 11} 19. h5 {+0.32/16 11} Qe7
{-0.44/19 9} 20. g4 {+0.54/14 0.1} Rc7 {-0.53/18 9} 21. g5 {+0.76/18 7}
Rec8 {-0.54/20 10} 22. Rc1 {+0.82/18 6} Ne4 {-0.50/19 10} 23. Qe3
{+0.88/15 6} Qb4 {-0.45/19 8} 24. g6 {+1.02/14 3} Qc5 {-0.87/16 9} 25. Qh3
{+1.22/16 0.5} Re8 {-0.89/17 10} 26. gxh7+ {+1.32/16 0.1} Kxh7 {-1.04/20 6}
27. Ng3 {+1.36/18} Kh8 {-1.07/19 3} 28. Bxe4 {+1.36/17} dxe4 {-1.22/22 9}
29. Qg4 {+1.48/18} Rd8 {-1.02/21 10} 30. h6 {+1.82/19} g6 {-0.90/23 1.0}
31. Nh5 {+1.68/19 9} Rcd7 {-0.88/22 0.6} 32. Qh4 {+1.70/17 6} Qf8
{-0.78/22 1.6} 33. Nf6 {+1.48/18 8} Rd4 {-0.79/21 1.1} 34. Qg5 {+1.58/16 5}
b4 {-0.71/18 8} 35. Qg1 {+1.80/15 5} a5 {-0.63/20 1.2} 36. b3 {+1.60/17 3}
Bc6 {-1.04/22 1.0} 37. Re2 {+1.46/16 5} Qe7 {-0.76/19 6} 38. Rh2
{+1.48/13 2.7} Bb5 {-0.43/18 6} 39. Qe3 {+1.17/14 10} Qb7 {-0.59/19 6} 40.
Qg3 {+1.17/13} a4 {-0.55/19 6} 41. Qg5 {+1.05/16 5} Qe7 {-0.85/20 5} 42.
Rh4 {+0.86/15 0.4} e3 {+0.85/19 9} 43. f5 {+0.14/16 5} Rxh4 {+1.12/19 0.3}
44. fxg6 {-0.68/17 1.8} fxg6 {+1.57/19 2.1} 45. Qxh4 {-0.82/18 1.8} e2
{+1.60/21 0.1} 46. Qg4 {-0.82/16 0.2} axb3 {+1.60/20 4} 47. axb3
{-0.52/18 13} Qa7 {+0.44/21 4} 48. Qxg6 {-0.44/20 5} Ra8 {+0.41/22 5} 49.
Qg7+ {-0.22/21 4} Qxg7 {+0.28/24 0.1} 50. hxg7+ {-0.22/22 4} Kxg7
{+0.32/24 0.1} 51. Re1 {-0.24/23 0.4} Ra5 {+0.22/23 3} 52. Nh5+
{-0.24/23 4} Kf7 {+0.18/25 2.9} 53. Kc1 {-0.22/24 4} Ba6 {+0.13/24 9} 54.
Nf4 {-0.08/27 4} Rxe5 {+0.13/24 4} 55. Nd3 {-0.06/26 0.1} Bxd3 {+0.20/27 4}
56. cxd3 {-0.04/29 4} Ke7 {+0.20/28 3} 57. Kd2 {-0.04/25 5} Kd6
{+0.14/30 3} 58. Rxe2 {+0.00/28 0.7} Rxe2+ {+0.00/32 3} 59. Kxe2
{+0.00/34 10} Ke5 {+0.00/43 3} 60. Ke3 {+0.00/34 3} Kd5 {+0.00/47 3} 61. d4
{+0.00/40 4} e5 {+0.00/67 15} 62. dxe5 {+0.00/55 3} Kxe5 {+0.00/100 0.4}
63. Kd3 {+0.00/62 2.9} Kd5 {+0.00/100} 64. Ke3 {+0.00/62 11} Ke5
{+0.00/100} 65. Kd3 {+0.00/62 3} Kd5 {+0.00/100} 66. Ke3 {+0.00/62 1.0} Ke5
{+0.00/100}
{Game drawn by repetition} 1/2-1/2
[/pgn]

At first Texel's king seemed to be in a lot of trouble but later it turned around. Texel then failed to find 45... axb3 and the game eventually ended in a draw.

[michiguel]

WaDuuttie did rather well this time against the multicore monsters.

Indeed. Texel's new NUMA awareness and speculative transposition table prefetch gave a nice NPS improvement on the 16-core computer, but in the game against WaDuuttie this was not enough:

[pgn]
[White "WaDuuttie"]
[Black "Texel"]
[Result "1/2-1/2"]
[WhiteElo "2018"]
[BlackElo "2175"]
[TimeControl "300+1"]
[Annotator "13. -0.08 11... +0.12"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8.
Nxd4 Bc5 9. Qd2 O-O 10. O-O-O a6 11. Qf2 Bxd4 {+0.12/19 10} 12. Bxd4 Nxd4
{+0.15/21 10} 13. Qxd4 {-0.08/17 9} b5 {+0.20/21 1.4} 14. Kb1 {-0.06/18 10}
Bb7 {+0.05/21 1.1} 15. Bd3 {-0.08/18 8} Rc8 {+0.02/19 10} 16. Ne2
{+0.08/18 15} Qc7 {-0.10/19 10} 17. h4 {+0.04/16 8} Nc5 {-0.07/20 0.9} 18.
Rhe1 {+0.22/16 1.1} Rfe8 {-0.26/18 11} 19. h5 {+0.32/16 11} Qe7
{-0.44/19 9} 20. g4 {+0.54/14 0.1} Rc7 {-0.53/18 9} 21. g5 {+0.76/18 7}
Rec8 {-0.54/20 10} 22. Rc1 {+0.82/18 6} Ne4 {-0.50/19 10} 23. Qe3
{+0.88/15 6} Qb4 {-0.45/19 8} 24. g6 {+1.02/14 3} Qc5 {-0.87/16 9} 25. Qh3
{+1.22/16 0.5} Re8 {-0.89/17 10} 26. gxh7+ {+1.32/16 0.1} Kxh7 {-1.04/20 6}
27. Ng3 {+1.36/18} Kh8 {-1.07/19 3} 28. Bxe4 {+1.36/17} dxe4 {-1.22/22 9}
29. Qg4 {+1.48/18} Rd8 {-1.02/21 10} 30. h6 {+1.82/19} g6 {-0.90/23 1.0}
31. Nh5 {+1.68/19 9} Rcd7 {-0.88/22 0.6} 32. Qh4 {+1.70/17 6} Qf8
{-0.78/22 1.6} 33. Nf6 {+1.48/18 8} Rd4 {-0.79/21 1.1} 34. Qg5 {+1.58/16 5}
b4 {-0.71/18 8} 35. Qg1 {+1.80/15 5} a5 {-0.63/20 1.2} 36. b3 {+1.60/17 3}
Bc6 {-1.04/22 1.0} 37. Re2 {+1.46/16 5} Qe7 {-0.76/19 6} 38. Rh2
{+1.48/13 2.7} Bb5 {-0.43/18 6} 39. Qe3 {+1.17/14 10} Qb7 {-0.59/19 6} 40.
Qg3 {+1.17/13} a4 {-0.55/19 6} 41. Qg5 {+1.05/16 5} Qe7 {-0.85/20 5} 42.
Rh4 {+0.86/15 0.4} e3 {+0.85/19 9} 43. f5 {+0.14/16 5} Rxh4 {+1.12/19 0.3}
44. fxg6 {-0.68/17 1.8} fxg6 {+1.57/19 2.1} 45. Qxh4 {-0.82/18 1.8} e2
{+1.60/21 0.1} 46. Qg4 {-0.82/16 0.2} axb3 {+1.60/20 4} 47. axb3
{-0.52/18 13} Qa7 {+0.44/21 4} 48. Qxg6 {-0.44/20 5} Ra8 {+0.41/22 5} 49.
Qg7+ {-0.22/21 4} Qxg7 {+0.28/24 0.1} 50. hxg7+ {-0.22/22 4} Kxg7
{+0.32/24 0.1} 51. Re1 {-0.24/23 0.4} Ra5 {+0.22/23 3} 52. Nh5+
{-0.24/23 4} Kf7 {+0.18/25 2.9} 53. Kc1 {-0.22/24 4} Ba6 {+0.13/24 9} 54.
Nf4 {-0.08/27 4} Rxe5 {+0.13/24 4} 55. Nd3 {-0.06/26 0.1} Bxd3 {+0.20/27 4}
56. cxd3 {-0.04/29 4} Ke7 {+0.20/28 3} 57. Kd2 {-0.04/25 5} Kd6
{+0.14/30 3} 58. Rxe2 {+0.00/28 0.7} Rxe2+ {+0.00/32 3} 59. Kxe2
{+0.00/34 10} Ke5 {+0.00/43 3} 60. Ke3 {+0.00/34 3} Kd5 {+0.00/47 3} 61. d4
{+0.00/40 4} e5 {+0.00/67 15} 62. dxe5 {+0.00/55 3} Kxe5 {+0.00/100 0.4}
63. Kd3 {+0.00/62 2.9} Kd5 {+0.00/100} 64. Ke3 {+0.00/62 11} Ke5
{+0.00/100} 65. Kd3 {+0.00/62 3} Kd5 {+0.00/100} 66. Ke3 {+0.00/62 1.0} Ke5
{+0.00/100}
{Game drawn by repetition} 1/2-1/2
[/pgn]

At first Texel's king seemed to be in a lot of trouble but later it turned around. Texel then failed to find 45... axb3 and the game eventually ended in a draw.

This is an interesting position. They key is not finding axb3, but the maneuver Ra8 Qc7 and Qa5 afterwards, which is not that difficult. Gaviota prefers axb3 but insists on e2, which is pointless. SF sees the whole thing immediately. I will check this later, but sounds like a null move thing to me.

So, in this position (after axb3 axb3), the move is Ra8.
[D]3r3k/4q3/4pNpP/1b2P3/1p5Q/1P2p3/2P5/1KR5 b - - 0 46

Miguel

[Joost Buijs]

Nightmare is slowly getting behind the other amateur programs.
I haven't touched the source for at least 7 months now.
It isn't easy to find enough inspiration to start working on it again.

I'd love to be able to include Nightmare in future 8 core tourneys I run.

The UCI protocol in Nightmare is only partially implemented, all parameters are hardcoded. This is something I have to improve, but for my personal use it is not very important.

I can make an executable for you when I know how much memory it may use for the TT, how many cores it may use (presumably 8) and where it can find the Nalimov table bases (if any).

[Joost Buijs]

Nightmare is slowly getting behind the other amateur programs.
I haven't touched the source for at least 7 months now.
It isn't easy to find enough inspiration to start working on it again.

Crafty has also been slipping behind. I had one good tournament with it a while back, but other than that it really struggles.

On the other hand, when I run Gaviota, I always feel that with a bit of luck on its side it has a chance of a top 3 finish or better. And it often achieves it. Miguel ran it himself of course today.

Indeed, there is some luck involved in winning a tournament, opening preparation is very important as well.

Crafty is not weak at all, but it has some weaknesses with respect to king safety that hinders its performance.

Nightmare also has weaknesses, I am aware of most of them, to address them is something else.

[Modern Times]

Crafty also got seriously out-booked on a couple of occasions, which it never recovered from.

[bob]

Crafty also got seriously out-booked on a couple of occasions, which it never recovered from.

I don't think most understand the goal of a book line. It is NOT to exit the book with a positive score, for example. It is to exit the book with a position that the program can actually play well, even if the initial evaluation is -.30 or something similar.

The book that is distributed with Crafty is NOT "that book". It was intended to offer a reasonably "wide" book to be interesting to play for humans, not to provide reasonable positions for tournaments with other computers...

[Modern Times]

I used a special book given to me by Peter a while back.