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Sicilian Defence: Kan, 5.Nc3 b5

Grischuk–Svidler, FIDE World Cup 2011 · Movsesian–Rapport, Reykjavik Open 2016 · 5:08 · ECO B43

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In this video

Game 1: Alexander Grischuk (2746) vs Peter Svidler (2739)

FIDE World Cup 2011, 16 September 2011 · Black won (0-1) · 30 moves

Click a move to jump the video to it. Dotted moves are the opening line the video is about.

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Key moments

  1. 7.Nf3The first move after the opening line0:32
  2. 24.Rd1The evaluation moves from −0.54 to −1.411:49
  3. 26.Rd5The evaluation moves from −1.90 to −4.40, and Black stays more than two pawns ahead from here1:59
  4. 30...Nf8Black wins after 30 moves2:22

Evaluation

Above the line, White is better; below it, Black. Scores are in pawns, capped at five either way.

Game 2: Sergei Movsesian (2653) vs Richard Rapport (2720)

Reykjavik Open 2016, 12 March 2016 · White won (1-0) · 33 moves

Click a move to jump the video to it. Dotted moves are the opening line the video is about.

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Key moments

  1. 7.Nf3The first move after the opening line2:53
  2. 22...Bc6The evaluation moves from +1.96 to +5.62, and White stays more than two pawns ahead from here4:02
  3. 25.Ng7+The evaluation moves from +3.51 to +5.584:15
  4. 30...Qc5The evaluation moves from +6.21 to +7.914:42
  5. 33.Qxb4White wins after 33 moves4:55

Evaluation

Above the line, White is better; below it, Black. Scores are in pawns, capped at five either way.

About these games

After 5...b5 and 6...Qb6 Black expands on the queenside first, with the queen hitting the knight on d4 and the bishop heading for b7 to press on e4 down the long diagonal. White answers by developing quickly, keeping the bishop on d3 aimed at the kingside and looking for an e5 push or a direct attack while Black's king is still in the centre. The structure is an open Sicilian with Black's e6 and d7 pawns facing White's e4 pawn, and the c-file half-open for Black.

Grischuk–Svidler: after 7.Nf3 Svidler set up with ...Nc6, ...Qb8 and ...Bd6-c7, so that Grischuk's 10.e5 met a prepared defence. At 16...O-O White stood at +0.71, and Grischuk then gave material with 17.Rxd7 and 19.Rxf7, collecting pawns for a piece. By 21...Kg8 the score was −0.36. Black's pieces then counterattacked: 25...Nxb2 took a pawn, and 26.Rd5 moved the evaluation from −1.90 to −4.40. Black won the white rook with 29...Nxd6, and after 30...Nf8 Black won.

Movesian–Rapport: Black chose 7...Qc7, ...Bb7 and ...Bc5 and kept the king uncastled, so White attacked at once with 10.Ng5 and 11.Qh5. At 16...Ne5 the game was level at +0.03, but 20.Ngxe6 fxe6 21.Nxe6 broke open the centre (+1.95). After 22...Bc6 the score jumped from +1.96 to +5.62, 25.Ng7+ took it from +3.51 to +5.58, and 30...Qc5 from +6.21 to +7.91. White won after 33.Qxb4. In Game 1 White's sacrifice failed against a castled king; here the uncastled king made the sacrifice on e6 decisive.

Chapters

  1. 0:00Introduction and the opening line
  2. 0:10Game 1: Grischuk vs Svidler, FIDE World Cup 2011
  3. 2:30Game 2: Movsesian vs Rapport, Reykjavik Open 2016

The opening line

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6

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