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1e4 e5 2 f4 exf4 3 Nf3
(Click on column number to see variation
in play)
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d6(a).......................Ne7........................f5...............................Nf6
4
d4(b)
d4
e5
e5
g5
d5
d5(f)
Nh5(g)
5
h4
Nc3
d4
Be2........................d4....................Qe2
g4
dxe4
g5
g6(h)
d6(j)
Be7
6
Ng1
Nxe4
h4
d4
Qe2
d4
Bh6(c)
Ng6
g4
Bg7
d5(k)
0-0(m)
7
Ne2
h4
Ng1
0-0
c4
g4
Qf6
Be7(d)
f3
d6
Be6
fxg3
8
Nbc3
h5
Bg5
Nc3
cxd5
Qg2(n)
Ne7
Nh4
fxg2
0-0
Bxd5
d6
9
Qd2
Bxf4
Bxg2
Nd5(i)
Nc3
hxg3
Nbc6
Bg4
Be7
dxe5
Nc6
Bg4
10
g3
h6
Nc3 +-
dxe5
Bd2
Nh2(o)
Bd7 =
0-0(e)
Nc6=
Bb4(l)
Nxg3(p)
(a) Fisher's Variation, He called 3.....d6 "a high-class waiting move." The idea is to hold the pawn while preventing the Ne5 as in Column 1.
(b) (A) 4 Bc4 transposes to Column 5. (B) Interesting is 2 d3 g5 5 h4 g4 6 Ng1 or 6 Nd4 with little explored possibilities.
(c) (A) Risky is 6.....Nf6, as in the Gallagher_Sanz, Gijon 1988: 7 Qd3! d5 (7.....Nc6 8 c3) 8 e5 Nh5 9 Ne2 Be7 10 Bxf4 c5 (10.....Bxh4+ 11 g3) 11dxc5 Nc6 12 Nbc3 Nxf4 13 Nxf4 Nxe5 14 Qe3 Bf6 15 Ncd5 0-0 16 0-0-0 Bg7 17 Nh5 Nd7 18 Ne7+ Kh8 19 Nxg7 Resigns. The Column is Planinc-Portisch, Portoroz, 1973 (B) 6.....f3 7 gxf3 Be7 8 Be3 Bxh4+ 9 Kd2 c5! 10 Kc1 (or 10 Bb5+) 10.....cxd4 11 Qxd4 Bf6, Gallagher-Conquest, British Chp.. 1988.
(d) Bad is 7.....Qe7? 8 Kf2! Bg4 (8.....Qxe4 9 Bb5+ Kd8 10 Re1 wins.) 9 h5 Nh4 20 Bxf4 + Spassky - Seirawan.
(e) Kuznetsov-Bonch-Osmolovsky, USSR 1964. White has a substantial advantage.
(f) After 4.....d6, Alapin's 5 Qe2 with the idea of 5.....dxe5 6 Nxe5 Qe7 7 d4 gives White the advantage.
(g) 4.....Ne4 might be playable, although after 5 d3 ng5 6 Bf4 Ne6 7 Bg3 d5 White stood freer in Tolush-Averbakh, USSR 1960.
(h) On (A) 5.....g5 White plays 6 0-0 (rather than 6 Nxg5) so that 6.....Rg8 7 d4 d5 8 c4 or 8 Qd3 gives White a plus. (B) 5.....d6 0-0 dxe5 7 Nxe5 and neither 7.....Bc5+ not 7.....Qd4+ allows Black an equal game.
(i) 9 Ne1 was disadvantageous for White in Chigorin-Steintz, Havana 1892. The text is Korchnoi's Idea.
(j) 5.....D5 6 c4 Nc6 7 cxd5 Qxd5 8 Nc3 Bb4 9 Be2 Bg4 10 0-0 +-
(k) 6.....dxe5 7 Nxe5 Qh4+ 8 g3 is not playable for Black.
(l) 11 Nxd5 Qxd5 12 0-0-0 Qxa2 13 d5! gives White a plus after 13.....Bxd2+ 14 Qxd2 and 13.....Qa1+ 14 Kc2 Qa4+ 15 Kb1.
(m) Weak is 6.....Bh4+ 7 Kd1 0-0 8 g4 fxg3 9 Qg2 +-, Randviir-Tallinn 1946.
(n) Aggressive is 8 hxg3 Nxg3 9 Qh2 Nxh1 10 Bd3, but 10.....f5 11 exf6 Bb4+ makes t his choice risky for White.
(o) Deserving of study is Kere's suggestion 10 Bd3 which should give White enought play for his pawn, e.g., 10.....Nc6 11 c3 Qd7 12 Nh2 (Korn).
(p)
11 Rg1 Bf5 12 Nf3 Nh5 13 Rh1 Bg6 14 Nc3 Nc6.