カテゴリー: Chess

1.g3 d5 2.Nf3 c6 3.Bg2 Bg4 4.d3 Nd7 5.h3 Bxf3 6.Bxf3 e5 7.Nd2 Ngf6 8.e4 dxe4
9.dxe4 Bc5 10.O-O Qe7 11.c3 O-O
{ 黒の局面は一見良さそうだが，positionally的には白マスのビショップ(QB)をナイト(N)と交換したことに起因する問題がある。長期的には白マスの防御が難しくなるだろう。 }
12.b4
{ 自陣を広げる手。Centerのポーンは固定されており，King側は安全のため前進させたくない。よって，論理的には進展させるべきはQueen側となる。 }
12...Bb6 13.a4 Rfd8 ( { ここで， } 13...a5 { とするのは } 14.Ba3
{ このあとNc4 or Nb3によりa3-f8 diagonal に危険性が高まるので，黒は敢えてこうはしない。 } ) 14.Qc2 Rac8
{ 既に黒は良い作戦を見つけられないでいる。 } ( { Better idea has } 14...Ne8
{ followed by Ne6 and a5 としてc5 or d4のgripをgetする。黒の困難はPieceのための良いOutpost(拠点)が無いことによる。 }
) 15.Be2 { 反対に白のBotvinnikにはc4という素敵なマスがあり，これをビショップあるいはナイトで占めることが出来る。 } 15...c5
$4 { 何の駒損もしない手に??(大悪手)は手厳しいかもしれないが，この手によって負けにしたことを強調しておきたい。 } 16.b5 $1
{ 何故に黒は負けなのか。答えはPawn structureにある。白はc4, d5という2つの素晴らしいマス目を持ち，さらに左翼には動けるPawnがある。 }
16...Ne8 17.Nc4 Nd6 18.Bg5
{ A surprise tactical shot だが目的はpositionalなものである。 } 18...f6
{ この手がポイントである。これによって黒は新たに自陣の中央にある白マス(e6)を弱めることを強いられた。これを避けようとしても上手く行かない。例えば， }
( 18...Qxg5 19.Nxd6 Rb8 20.Bc4 ) ( 18...Nf6 19.Ne3 $140 { followed by Nd5 } )
19.Be3 Nxc4 20.Bxc4+ Kh8 21.a5 Bc7 22.Rfd1 Nf8 { ルークを交換しても黒の状況は良くならない。 }
23.Qa2 Rxd1+ 24.Rxd1 Rd8 25.Rxd8 Bxd8 26.a6
{ さらに白マス(c6)を支配すると同時に，Queenをa-Pawnの守りから解放する。 } 26...b6 27.Kg2 Qd7 28.Qe2 Ng6
29.Bb3 { At last an attack, but there's no need for any excitement. }
29...Ne7 30.Qc4 h6 31.Qf7 $1 Kh7 ( 31...Qxb5 32.Qf8+ Kh7 33.Qxd8 Qxb3 34.Qxe7
) 32.Bc4 Qd6 33.h4
{ Botvinnik now weaves a mating net on the White squares. } 33...Qd1 34.Qe8
{ With the threat of Bf7, h5, followed by Bg6+, etc. There's no defense. }
34...f5 35.exf5 Nxf5 36.Bg8+ Kh8 37.Bf7+ 1-0



[Event "Portoroz izt"]
[Site "Portoroz izt"]
[Date "1958.08.16"]
[Round "8"]
[White "Fischer, R."]
[Black "Larsen, B."]
[Result "1-0"]
[ECO "B76"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6
{ Larsen was one of the die
hards who refused abandon the Dragon until recently. White's attack almost
plays itself ... weak players even beat Grandmasters with it. I once thumbed
through several issues of Shakhmatny Bulletin, when the Yugoslav Attack
was making its debut, and found the rario was something like nine wins out of
tenin White's favor. Will Black succeed in reinforcing the variation? Time will
tell. } 6.Be3 Bg7 ( 6...Ng4 $2 { still loses to } 7.Bb5+ { . } ) 7.f3 O-O
8.Qd2 Nc6 9.Bc4 Nxd4 (
{ Just how Black can attempt to thread his way to equality is
not clear. Interesting is Donald Byrne's } 9...a5
{ . The strongest replay is } 10.g4 { and if } 10...Ne5 11.Be2 d5 $2 12.g5 $1
{ wins a Pawn. } ) 10.Bxd4 Be6 11.Bb3 Qa5 12.O-O-O b5 ( { After } 12...Bxb3
13.cxb3 $1
{ Black cannot
make anyattacking headway against this particular Pawn configuration. White is
lost inthe King and Pawn ending, it's true, but Black usually gets mated long
beforethen. As Tarrasch put it: "Before the endgame the gods have placed the
middlegame." } ) 13.Kb1 b4 14.Nd5 ( { Weaker is } 14.Ne2 Bxb3 15.cxb3 Rfd8
{ . } ) 14...Bxd5 ( { Bad judgement is } 14...Nxd5 15.Bxg7 Kxg7 16.exd5 Bd7
17.Rde1
{ with a crushing bind. (Suetin-Korchnoi, USSR Championship prelims
1953.) } ) 15.Bxd5 ( { Stronger is } 15.exd5 $1 Qb5 16.Rhe1 a5 17.Qe2 $1
{ (Tal-Larsen, Zurich 1959) where White abandons the attack and plays
forpressure along the e-file instead. } ) 15...Rac8 $2 (
{ The losing move.
After the game Larsen explained he was playing for a win, and therefore rejected the forced draw with }
15...Nxd5 16.Bxg7 Nc3+ 17.bxc3 ( 17.Bxc3 bxc3 18.Qxc3 Qxc3 19.bxc3 Rfc8
{ renders White's extra Pawn useless. } ) 17...Rab8 $1 18.cxb4 Qxb4+ $1
19.Qxb4 Rxb4+ 20.Bb2 Rfb8 { , etc. } ) ( { After } 15...Nxd5
{ , however, I intended simply } 16.exd5 Qxd5 17.Qxb4
{ , keeping the game
alive. } ) 16.Bb3 $1
{ He won't get a second chance to snap off the Bishop! Now
I felt thegame was in the bag if I didn't botch it. I'd won dozens of skittles
games inanalogous positions and had it down to a science: pry open the h-file,
sac, sac... mate! } 16...Rc7
{ This loss of time is unfortunately necessary if
Black is ever to advance his a-Pawn. } ( 16...Qb5 { ? is refuted by } 17.Bxa7
{ . } ) 17.h4 Qb5
{ There's no satisfactory way to impede White's attack. Now
Black is threatening to get some counterplay with ...a5-a4. } ( { If }
17...h5 18.g4 hxg4 ( 18...Rfc8 19.Rdg1 hxg4 20.h5 gxh5 21.fxg4 Nxe4 22.Qf4 e5
23.Qxe4 exd4 24.gxh5 Kh8 25.h6 Bf6 26.Rg7 { wins } ) 19.h5 gxh5 ( 19...Nxh5
20.Bxg7 Kxg7 21.fxg4 Nf6 22.Qh6+ { mates } ) 20.fxg4 Nxe4 ( 20...hxg4 21.Rdg1
e5 22.Be3 Rd8 23.Bh6 ) ( 20...Nxg4 21.Rdg1 Bxd4 22.Rxg4+ hxg4 23.Qh6 ) 21.Qe3
Nf6 ( 21...Bxd4 22.Qxe4 Bg7 23.Rxh5 ) 22.gxh5 e5 23.h6 ) 18.h5 $1
{ There's
no need to lose a tempo with the old-fashioned g4. } 18...Rfc8 ( { On }
18...gxh5 19.g4 $1 hxg4 20.fxg4 $1 Nxe4 21.Qh2 Ng5 22.Bxg7 Kxg7 23.Rd5 Rc5
24.Qh6+ Kg8 25.Rxg5+ Rxg5 26.Qxh7# ) 19.hxg6 hxg6 20.g4 (
{ Not the impatient } 20.Bxf6 $2 Bxf6 21.Qh6 e6 $1
{ (threatening ...Qe5) and Black holds
everything. } ) 20...a5
{ Now Black needs just one more move to get his
counterattack moving. But for the want of a nail the battle was lost... }
21.g5 Nh5 ( { Vasiukov suggests } 21...Ne8 { as a possible defense } ) (
{ (not } 21...a4 22.gxf6 axb3 23.fxg7 bxc2+ 24.Qxc2 e5 25.Qh2 { wins); } ) (
{ but White
crashes through with } 21...Ne8 22.Bxg7 Nxg7 ( 22...Kxg7 23.Qh2 ) 23.Rh6 e6
( 23...a4 24.Qh2 Nh5 25.Rxg6+ ) 24.Qh2 Nh5 25.Bxe6 fxe6 ( 25...Qxg5 26.Rxg6+
Qxg6 27.Bxc8 ) 26.Rxg6+ Ng7 27.Rh1 { , etc. } ) 22.Rxh5
{ Fine wrote: "In
such positions, combinations are as natural as a baby's smile." } 22...gxh5
( 22...Bxd4 23.Qxd4 gxh5 24.g6 Qe5 ( 24...e6 25.Qxd6 ) 25.gxf7+ Kh7 (
25...Kf8 26.Qxe5 dxe5 27.Rg1 e6 28.Bxe6 Ke7 29.Bxc8 Rxc8 30.Rg5 ) 26.Qe3 )
23.g6 e5 ( 23...e6 24.gxf7+ Kxf7 ( 24...Rxf7 25.Bxe6 ) 25.Bxg7 Kxg7 26.Rg1+
Kh7 27.Qg2 Qe5 28.Qg6+ Kh8 29.Rg5 Rg7 30.Rxh5+ Kg8 31.Bxe6+ Kf8 32.Rf5+ Ke7
33.Rf7+ ) 24.gxf7+ Kf8 25.Be3 d5 $1 { A desperate bid for freedom. } (
{ On } 25...a4 26.Qxd6+ Re7 27.Qd8+ Rxd8 28.Rxd8+ Re8 29.Bc5+ { mates. } ) (
{ if } 25...Rd8 26.Bh6 ) 26.exd5 $1 ( 26.Bxd5 Rxc2 $1 ) 26...Rxf7 ( 26...a4
27.d6 axb3 28.dxc7 ) 27.d6 Rf6 ( 27...Rd7 28.Be6 ) ( 27...Rd7 28.Bh6 ) (
27...Rxf3 28.d7 ) 28.Bg5 Qb7 ( 28...Qd7 29.Qd5 Qf7 ( 29...Rf7 30.Be7+ $1 )
30.Bxf6 ) 29.Bxf6 Bxf6 30.d7 Rd8 31.Qd6+ ( { A mistake! } 31.Qh6+ $1
{ forces mate in
three. } ) 1-0