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Magnus Carlsen vs Kai-Roger Johansen
Troll Masters (2001), Gausdal NOR, rd 7, Jan-10
Modern Defense: Pseudo-Austrian Attack (B06)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Jul-22-08  Mulyahnto: Another cheap pawn grab gets punished.
Mar-10-16  Sergash:


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<5.dxc5!> The obvious idea is that if 5...dxc5?! 6.Qxd8+ Kxd8 with Black losing the right to castle, with the king hampering piece development.

<5...Qa5?!> The game Bjorn Brink Claussen - Bent Larsen, Denmark [Championship 1963 in Odense, round 2, draw] went like this: 5...Bxc3+! 6.bxc3 but then 6...dxc5 was inferior. The correct path is to play this as a gambit: 6...Nf6! 7.cxd6 (Soenke Maus (2425) - Aleksander Mista (2165), 3rd Wichern Open (Germany) 1995, round 7, 1-0) Qxd6!N 8.Qxd6 exd6 9.e5! dxe5 10.fxe5 Nd5 Stockfish 7 - 64 bits Popcnt.

<8...Qd4> A fork, 2 pawns being attacked. If now 9.dxe7 Qxe4+ and Qxe7.

<9.Bd3 Qxd6 > Johansen having re-established material equality, possibly he thought he would be okay? But White's development is more advanced and he got the bishop pair.

Mar-10-16  Sergash: <10.Bc3!N> A noverlty by Carlsen. Historically, White had only played 10.Nf3 here, which is not bad, but Carlsen's move forces Black's reply: 10...f6, as if 10...Nf6? 11.e5 wins.

<11.Nf3> Why not 11.Ne2! ? Stockfish 7 - 64 bits Popcnt.

<11...Nc6> Also possible was 11...Qxf4 12.0-0 Qc7! 13.Qd2 Bg4 Stockfish 7 - 64 bits Popcnt.

<12.Bd2?!> Better is 12.Qd2 . Otherwise there is 12.Rb1 with the idea that if 12...Qxf4 13.0-0 with a nice development advance. Stockfish 7 - 64 bits Popcnt.

<12...Qc5> Preventing White from castling. But Black could have taken advantage of the moment to further develop his pieces with 12...Nh6 / Stockfish 7 - 64 bits Popcnt.

<13.Qe2> 13.Rb1! Nh6 (13...a6 14.Qe2 Stockfish 7 - 64 bits Popcnt) 14.Rb5 followed with 0-0. Stockfish 7 - 64 bits Popcnt.

<13...Nh6> 13...Bg4! (idea: Nc6-d4) 14.Be3! Qa5+ 15.Kf2 Nh6 Stockfish 7 - 64 bits Popcnt.

<14.h3?! 0-0 > Black has managed to reduce a good portion of the pressure that was on his back. Again 14.Rb1! Stockfish 7 - 64 bits Popcnt.

<15...Qc3+! 16.Kf2 (only move) Nf7! 17.Rhd1 e5> 17...Nd6 possibly contained more wisdom.

Mar-10-16  Sergash:


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<18...Qa5?> 18...exf4! 19.Bxf4 (19.Bd2 Qa3! = Stockfish 7 - 64 bits Popcnt) Re8! Stockfish 7 - 64 bits Popcnt.

<19.Kg1?! > 19.fxe5! Ncxe5 20.Bd5! Kg7 21.Nd4 / Stockfish 7 - 64 bits Popcnt.

<19...Kg7?!> 19...exf4! 20.Bxf4 Re8 Stockfish 7 - 64 bits Popcnt.

<20.Rab1> Both players have a blind spot in this position! 20.fxe5! Nxce5 (or 20...Nfxe5 21.Bd5! / Stockfish 7 - 64 bits Popcnt) 21.Bd5! / Stockfish 7 - 64 bits Popcnt.

<20...Qc7?!> The only chance was in 20...exf4! 21.Bxf4 Qa3 / followed by Qe7 (or 21...Qc5+ / followed with Qe7 Stockfish 7 - 64 bits Popcnt.

<21.Bc5?!> I hate to repeat myself, but 21.fxe5! Ncxe5 (recapturing with the other knight would transpose in the same variation) 22.Nxe5 Nxe5 23.Bd5 (only move) Stockfish 7 - 64 bits Popcnt.

<22.Bxf7! Qxf7 (no other choice) 23.fxe5! (at last) fxe5? 24.Ng5! > The only move was 23...Nxe5 24.Nxe5! fxe5 (24...Rxe5 25.Bd4! Re6 26.Rf1 Stockfish 7 - 64 bits Popcnt) 25.Rf1 Qc7! 26.Qc4! (idea: winning the black queen by Bc5-f8+) Kh8 (threatening to win White's bishop with b7-b6 in return; or 26...Re7 27.Qb4! Re8 (only move) 28.Kh2! Stockfish 7 - 64 bits Popcnt) 27.Rf7! Qc6 (only move, repeating the threat of b7-b6, winning a piece) 28.Qd5! Qxd5 (no choice) 29.exd5 Stockfish 7 - 64 bits Popcnt.

<24...Qxa2?! 25.Qf2!> The lesser evil was 24...Qf6 but there was no hope left for Black at this point.

<26.Rf1> There was a mate in 14 moves beginning with 26.Rb3! Stockfish 7 - 64 bits Popcnt.

<28.Qf6+> Mate in 6 moves: 28.Bf8+ Kg8 29.Qf6! etc. Stockfish 7 - 64 bits Popcnt.

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