Author: Albert Silver
Date: 19:01:09 02/17/98
Hi all,
I found a fascinating possibility arise in the game between
Wellington Rocha and Darcy Lima in the Brazilian nationals. None of my
programs seem to find it (and I don't actually know what actual depth is
rquired). Which program is actually capable of finding it, and at what
depth?
Albert
[Event "Brazilan Nationals 1997 "]
[Site "Rio de Janeiro"]
[Date "1998.02.15"]
[Round "10"]
[White "Wellington Rocha"]
[Black "Darcy Lima"]
[Result "1-0"]
[ECO "D21"]
[WhiteELO "2325"]
[BlackELO "2475"]
[Annotator "Albert Silver"]
[Source ""]
[Remark ""]
1.d4 d5 2.c4 dc4 3.Nf3 c5 4.e3 cd4 5.Bc4 Qc7 6.Qb3 e6 7.ed4 Nc6
8.0-0 a6 9.Bd2 {N} ( 9.Be2 Nf6 10.Nc3 Be7 11.Be3 0-0 12.Rac1
Bd7 13.Na4 Nd5 {'Yermolinsky A. - Lima D., Manila 1992 Olympiad'} )
( 9.Bd3 {'Wojtkiewicz A. - Baburin A., San Francisco 1997 It'} )
Nf6 10.Bd3 Be7 11.Nc3 0-0 12.Rac1 Rd8 13.Ne4 Qb8 14.Rfe1 Bd7
15.Nc5 Be8 16.Be3 Ra7 17.a3 Nd5 18.Bb1 a5 19.Qd3 g6 20.h4 b6
21.Ne4 Nf6 22.Nf6+ Bf6 23.Qe4 Ne7 24.h5 Nd5 25.Bh6 Ra8 26.Ne5
Qd6 27.hg6 hg6 28.Qg4 Bg7 29.Qh3 ( 29.Bg7 {!} Kg7 30.Rc6 {!!} Qf8
( 30...Qe7 31.Ng6 f5 ( 31...Qf6 32.Ree6 fe6 33.Re6 $18 )
( 31...Qb7 32.Nf4+ Kf8 33.Rce6 {!} Qd7 34.Qg5 {'with the idea'
Qh6-h7-h8#}
$18 ) 32.Qg3 Bg6 33.Ree6 Qf7 34.Rg6+ Kf8 35.Bf5 $18 )
( 30...Bc6 31.Bg6 {!} Kf8 ( 31...fg6 32.Qg6+ Kh8 33.Nf7# )
( 31...Nf6 32.Qg5 Ng4 33.Bf7+ Kf8 34.Qg8+ Ke7 35.Qg7 {!} Rd7
( 35...Ne5 36.Bh5+ Nf7 37.Qf7# ) 36.Be6+ Kd8 37.Nc6+ Qc6 38.Bd7
Qd7 39.Qf8+ Kc7 40.Qa8 $18 ) 32.Bf7 Ne7 ( 32...Nf6 33.Qg6 Qd5
34.Nc6 Qf5 35.Re6 Qg6 36.Bg6 $16 ) ( 32...Re8 33.Qg6 {!$18} {'with the
idea'Qh7-Ng6#}
) 33.Qg5 Nd5 34.Qh6+ Ke7 35.Be6 {!} Re8 ( 35...Nf6 36.Ng6+ Ke8
37.Qh8+ ) 36.Nf7 {!$18} ) 31.Re6 {!} fe6 32.Ng6 Nf6 33.Qg3 Bg6
( 33...Qd6 34.Nf4+ Kf7 35.Ba2 ( 35.Ba2 b5 36.Qg6+ Ke7 37.Qg7+
$18 ) Bd7 36.Qg6+ Ke7 37.Qg7+ Ke8 38.Ne6 Be6 39.Re6+ Qe6 40.Be6
$18 ) 34.Qg6+ Kh8 35.Re6 Qg7 36.Rf6 Qg6 37.Bg6 Rab8 38.Rf4 $14 )
Bh6 30.Qh6 Qf8 31.Qh4 Qe7 32.Qg3 Rac8 33.Ba2 Rc1 34.Rc1 Qd6 35.Qh4
Qe7 36.Qg3 Qd6 37.Qf3 Kg7 38.g3 Ne7 39.Rd1 Nf5 40.Qc3 Kg8 41.d5
Qc5 42.Qc5 bc5 43.Rc1 ed5 44.Rc5 a4 45.Rd5 Rb8 46.Rd2 Kg7 47.g4
Nh4 48.Kh2 Rb5 49.Kg3 Re5 50.Kh4 g5+ 51.Kg3 Re1 52.f3 Kf6 53.Kf2
Rc1 54.Ke3 Ke7 55.Bd5 f6 56.Be4 Bb5 57.Rd4 Bd7 58.Bd3 Rh1 59.Be2
Rb1 60.Rb4 f5 61.Bd3 f4+ 62.Ke2 Rh1 63.Be4 Kd6 64.Rd4+ Ke7 65.Kd2
Rh2+ 66.Kc3 Rh3 67.Rd3 Be6 68.Kb4 Rh2 69.Ka4 Rb2 70.Ka5 Bc4 71.Rc3
Be2 72.Bc6 Kd6 73.a4 Ke5 74.Bb5 Kd4 75.Ra3 Kc5 76.Be2 Re2 77.Rc3+
Kd4 78.Kb4 Re3 79.Rb3 Re8 80.a5 Ra8 81.Ka4 Ra7 82.Ra3 Kc4 83.Ra1
Ra8 84.Re1 Rd8 85.Rc1+ {85...Kd3 86.Rd1} 1-0
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