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The Sicilian Defence, Chekhover Variation (also sometimes called the Szily Variation or Hungarian Variation) is a chess opening named after Vitaly Chekhover, from the game Chekhover–Lisitsin, Leningrad 1938. [1] It is defined by the moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4
The Sicilian Defence is a chess opening that begins with the following moves: . 1. e4 c5. The Sicilian is the most popular and best-scoring response to White's first move 1.e4. The opening 1.d4 is a statistically more successful opening for White because of the high success rate of the Sicilian defence against 1.e4.
Riga Variation of the Ruy Lopez – 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4 6.d4 exd4; Rio de Janeiro Variation of the Ruy Lopez – 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.0-0 Nxe4 5.d4 Be7; Romanian Opening (or Dunst Opening) – 1.Nc3; Romanian Defense of the Wing Gambit – 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Nf3 e5 6.Bb2 Nc6 7.c4 Qe6
A Poisoned Pawn Variation also exists in the French Defence, Winawer: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4 Qc7 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Ne2 Nbc6 (or 10.Kd1 Nd7). Like the Poisoned Pawn Variation in the Sicilian Najdorf , this line gives significant weaknesses for both sides and can lead to highly complex lines.
Abonyi Variation of the Budapest Gambit – 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6 – named after István Abonyi [2]; Adams Attack of the Sicilian Defence – 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 – named after Weaver W. Adams [3]
The characteristic KIA setup is 1.Nf3, 2.g3, 3.Bg2, 4.0-0, 5.d3, 6.Nbd2, and 7.e4, although these moves may be played in several different orders. In fact, the KIA is often reached after 1.e4 when White uses it to respond to a Black attempt to play one of the semi-open games such as the Caro–Kann, French, or Sicilian, or even the open games ...
For example, Harry Golombek, in Capablanca's 100 Best Games of Chess (1947), gave a question mark to Black's fourth move in the line 1.e4 c5 2.Ne2 d6 3.d4 cxd4 4.Nxd4 g6, a form of the Accelerated Dragon variation of the Sicilian Defence, stating that 4...Nf6 was "necessary" to make White block his c-pawn with 5.Nc3 and thus avoid the Bind.
For example, White retains a slight plus after 3.d4 cxd4 4.Nxd4 Bb7 5.Nc3 a6 6.Bd3 g6 7.f4 Bg7 8.Nf3 d6 9.0–0 Nf6 10.Qe1 0–0 11.Qh4 Nbd7 12.Bd2. [2] The opening is a favorite of French GM Christian Bauer, with which he managed to draw a game in 2005 against currently top-ranked GM Magnus Carlsen. [3] It has also been used by top players ...