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A1)
3....d6? 4.dxe5 dxe5 (4....Nxe4 5.Bxf7+ or 5.Qd5
Be6 6.Qxb7 +-) 5.Bxf7+ Kxf7 6.Qxd8 Bb4+ 7.Qd2 Bxd2+ 8.Nxd2
±
A2)
3....Bd6? 4.Nf3?! (Better is 4.dxe5! Bxe5 5.f4
Nxe4 6.Qh5! +-) 4....Nc6 5.dxe5 Bxe5 6.Nxe5 Nxe5 7.Bb3
O-O 8.f4 Nc6 9.Nc3 d6 10.O-O += Loya--Wood,
Flagstaff 1991.
A3)
3....c6 4.dxe5 Qa5+ (4....Nxe4 5.Qe2 += see B5
below) 5.Nc3 Nxe4 (5....Qxe5 6.Nf3 +=) 6.Bxf7+ Kxf7
7.Qf3+ Nf6 8.exf6 Qe5+ 9.Ne4 Bb4+ 10.Kf1 Re8 11.fxg7+ Kxg7
12.Qg4+ Kh8 13.Bg5! Be7 14.Nf3 Qb5+ 15.Kg1 d5 16.Qh5 Bd7 17.Nf6!
1-0 Marshall--Forseberg,
New York 1924  (17....Bxf6
18.Bxf6; 17....Bf5 18.Qe8).
A4)
3....d5!? (Hooper's Gambit)
A4a)
4.dxe5
A4a1)
4....Nxe4?! 5.Bxd5 += Ng5 6.Bxg5 Qxg5 7.Nf3!
Qh5 8.Nc3 Be7 9.h3 c6 10.Bb3 O-O 11.Qe2 Na6 12.Ne4 Nc5
13.Nxc5 Bxc5 14.O-O-O ± Tartakower--von
Scheve, Barmen 1905.
A4a2)
4....dxc4 5.Qxd8+ Kxd8 6.exf6 gxf6 is difficult to
assess, in a way similar to the classic Berlin Defense
to the Ruy Lopez where Black has the two Bishops in exchange
for pawn weaknesses. The line should favor White, but
examples are few and inconclusive:
A4a2a)
7.Bf4 Bb4+ 8.Nc3 Bxc3+ 9.bxc3 Bd7 10.O-O-O Re8
11.f3 Kc8 12.Ne2 b6 += 13.Ng3 a5 14.Rd5 b5 15.Rh5
b4 16.Rxh7 Be6 17.h4 Nd7 18.h5 Rb8 19.h6 b3 20.cxb3
cxb3 21.axb3 Nc5 22.Ne2? Nxb3+ 23.Kc2 a4 24.Nc1 a3 25.Na2
Rd8 26.c4 Nd4+ 27.Kc3 Ne2+ 28.Kc2 Rb2# 0-1 Pitschka--Nuer,
Berlin 1984.
A4a2b)
7.Nc3 Bd6 8.Nge2 Rg8 9.Ng3 Bg4 10.f3 Be6 11.Be3
c6 12.O-O-O Kc7 13.Nce2 Nd7 14.Rd2 Ne5 15.Rhd1 Bb4 16.Nc3
b6 17.Nh5 Be7 18.h3 Ng6 19.f4 += Schaefer--Schulenburg,
Germany 1994.
A4b)
4.exd5! exd4 (4....e4!? 5.Nc3 Bb4 6.Bg5 +=) 5.Qxd4
Be7 (5....c6 6.Nc3 b5 7.Bb3 b4 8.Ne4 [8.Nce2] 8....Nxd5
9.Bg5 +=) 6.Nc3 Nc6 7.Bb5?! (7.Qd2! Ne5 8.Bb5+
Bd7 9.Qe2 +=/±) 7....O-O! 8.Qd1 Nb4 9.Bc4 Bf5
10.Bb3 Re8 11.Nge2 c6 12.dxc6 Qxd1+ 13.Kxd1 Rad8+ =
14.Bd2 Nxc6 15.h3 Bc5 16.Rf1 Be4 17.Nf4 g5 18.Nxe4 Nxe4
19.Nd3 Bb4 20.Be3 Nd4 21.Ba4 Re6 22.c3 Nf5 23.Kc2 Nxe3+
24.fxe3 Bd6 25.Bb3 Re7 26.Rf5 Kg7 27.Raf1 f6 28.R1f3 a6
29.Bd5 Rf8 30.Bxe4 Rxe4 31.Rd5 Re6 32.Nc5 Bxc5 33.Rxc5 Rfe8
34.Rc7+ R8e7 35.Rxe7+ Rxe7 36.Kd3 Kg6 37.e4 Re5 38.g4 h6
39.Rf5 Re6 40.c4 Rb6 41.b3 Re6 42.Kd4 h5 43.Kd5 Rc6 44.c5
hxg4 45.hxg4 a5 46.a3 Ra6 47.e5 fxe5 48.Rxe5 Ra8 49.Re6+
Kf7 50.Rb6 Rd8+ 51.Ke5 Rd7 52.b4 a4 53.b5 Rd3 54.Rxb7+ Kg6
1-0 Regan--Kichinski,
1988.
A5)
3....Qe7 4.Nf3 d6 5.Nc3 c6 6.Bg5 g6 7.Qd2 Bg7 8.O-O-O b5 9.dxe5
dxe5 10.Nxb5! O-O 11.Nc3 += Broome--Barrios,
Moscow 1994.
A6)
3....Nc6
Lasker’s recommendation practically forces transposition to
The Two Knights Defense after 4.Nf3. White's alternatives
are not promising.
A6a)
4.Bxf7+? Kxf7 5.dxe5 Nxe5 6.f4 Nc6 7.e5 d5?! (Black
refuses to be outdone in the romantic disregard for material)
8.exf6 Qxf6 9.Nf3 Bb4+ 10.c3 Re8+ 11.Kf1 Bd6
=+ 12.Ng5+ Kg6 13.Qd3+ Qf5 14.Qg3 Qg4 15.Qxg4 Bxg4 16.h3
Be2+ 17.Kf2 Bc5+ 18.Kg3 Ne7 19.Kh2 Nf5 20.g4 Ne3 21.Na3
Bd6 22.Kg3 h6 23.Nf3 Re4 24.Kf2 Bf3 25.Kf3 Bf4 26.Bxe3 Rxe3+!
-+ 27.Kf2 Rae8 28.Rad1 Re2+ 29.Kf3 Bg5 30.Rd3 Bh4 31.Rf1
0-1 Thomas--Milner-Barry,
Hastings 1938.
A6b)
4.d5?! Ne7 (4....Na5!? 5.Bd3 c6 6.c4 b5!?) 5.Nc3
(5.f4!? Leach; 5.d6?! Ng6! =+; 5.Bd3 Ng6 6.Be3 c6 7.c4 Bb4+
=+) 5....Ng6 6.Nge2 (6.Bg5 h6) 6....Bc5 7.O-O
d6 8.Bb5+ Bd7 9.Bxd7+ Qxd7 10.Qd3 O-O 11.Bg5 Ne8 12.Ng3
Qg4 13.Be3 Nf4 =+ 14.Qd1 Qg5 15.Qf3 g6 16.Bxc5
dxc5 17.Rfe1 Nd6 18.Nge2 Nh5 19.Ng3 Nf4 20.Nge2 Rae8 21.Nxf4
exf4 22.b3 Re5 23.Re2 Rfe8 24.Rae1 b5 =+ but eventually
1-0 in Bannasch--Boege,
Baden Baden 1988.
A6c)
4.c3!? Nxe4 5.Bd5 (Harding) 5....Nf6 6.Bxc6 dxc6
7.Qe2!? e4 =+
A6d)
4.dxe5 Nxe5
A6d1)
5.Be2 (Harding) 5....d6?! (5....d5! 6.f4 Ng6
7.e5 Ne4 =+) 6.Nc3 Be7 7.f4 Ng6 8.Nf3 c6 9.O-O O-O
10.Kh1 d5 11.e5 Ne8 += Kiss--Sepulveda,
Sao Lourenco WYCF-U14g 1995.
A6d2)
5.Bb3 Bc5 (=+ Lasker) 6.Nf3 Nxf3+ 7.Qxf3 O-O 8.O-O
d6 9.Bg5 Bd4 10.c3 Be5 11.h3 h6 12.Be3 Kh7 13.Nd2
g5 14.g4 Be6 15.Nc4 Nd7 16.Rad1 Qe7 17.Rfe1 Bg7 18.Bd4
Ne5 =+ Hobson--Isaacs,
US Open Baltimore 1948.
A6e)
4.Nf3! transposes to The Two Knights Defense. Part of
this site covers the
Perreux Variation (4....exd4 5.Ng5). And
for those interested in the Max
Lange lines (4....exd4 5.O-O), Max Burkett has posted
an excellent PGN zip file covering those. More material
will eventually follow, including the Modern Variation (4....exd4
5.e5).
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