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Martin Osttveit vs Magnus Carlsen
Ostlandserien 01/02 div. 1, OSS - Asker (2002), Oslo NOR, rd 8, Mar-08
English Opening: Symmetrical. Symmetrical Variation (A36)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Jul-16-16  Sergash: Martin Osttveit from Norway has no FIDE title. Born in 1983, he was 18 or 19 years old when he played this game. In June 2016, he is rated 2066, though his peak was 2121 in October 2001.

I looked at the game with the assistance of the program Komodo 10 - 64 bits.

<1...c5> Carlsen coming back to that move. Last time he was in this position, he had played 1...Nf6 (see D Hersvik vs Carlsen, 2001 , a draw in 12 moves!). For the oldest game, see K Stokke vs Carlsen, 2001 another 12 move draw, as if Carlsen considered the English Opening as an almost automatic draw in 2001!).

<5...e6> The last time Carlsen had been facing this position, he had played 5...d6 (see the game just mentioned K Stokke vs Carlsen, 2001 ).

<10...d4N> This could be a theoritical novelty. 10...b6 11.Rb1 d4 12.Ne4 = / . Anatolij Sazonov (2220) vs. Valery Kedrov (2385), Moscow IM2 (Russia) 1996, 0-1.

<11.Na4?!N b6 > But the "true" novelty was this move, as Osttveit could have transposed in the game Sazonov vs. Kedrov mentioned above with 11.Ne4 b6 12.Rb1 Nd5 = / .

<13...Re8?!> Carlsen missed the posibility of obtaining a clear advantage, here: 13...Nxf4! 14.gxf4 Ne7! 15.Nxd4! cxd4 16.Bxa8 Bh3! 17.Be4! Nd5! (or also 17...Bxf1 18.Qxf1 Qd6 ).

<14.bxc5?! b5! > 14.Bd2! h6 (or 14...Rb8 15.Re1! Bb7 16.Qb3 ) 15.Re1 .

Jul-16-16  Sergash: <16...Bb7?!> Better is 16...Nce7! 17.Bd2! h6! 18.Ne4! Bd7! 19.Qa6!


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<17.Qb5?? Nxf4! > The losing move. From the diagram position, there was that problem-like line: 17.Nxf7!! Kxf7 18.Rb1! Na5! 19.Rxb7! Nxb7 20.Qc4! Na5 (or 20...Nxc5 21.Bxd5+! Ne6 22.Rb1! Qc8 ) 21.Bxd5+! Kf8 22.Qa2! Rxe2! 23.Bd6+! Qxd6! 24.cxd6! Rxa2 24.Bxa8 .

I guess it would have taken a Alekhin, a Fischer or a Tal to foresee such a line...

<18.Qxb7 Nxe2+! 19.Kh1 Qxg5> White is lost, but somewhat better were:

A) 18.gxf4 Qc7! 19.Ne4 Rab8! .
B) 18.Nxf7 Qc7 19.Nd6 Nxe2+ 20.Kh1 Nxc1! 21.Rxc1 Re2! .

<20.f4?> Worsening things... 20.Rc2 Nc3! 21.Bxc6 Red8! .

<20...Qe7 21.Bxc6> Stronger is 20...Qh6! 21.Qxc6 Nxg3+! 22.Kg1 Ne2+! 23.Kh1 (not 23.Kf2?! Qh4+! 24.Kf3 Qxf4#) Be5! .

<21...Qxb7?! 22.Bxb7> 21...Nxc1! 22.Qxe7 Rxe7 23.Rxc1 (inferior is 23.Bxa8 Nxd3 ) Rc8 24.Bb5 Re2 .

Jul-16-16  Sergash: <22...Rab8> 22...Again 22...Nxc1! 23.Rxc1 Rab8 24.c6 Bf8! with the idea if 25.c7?! Rxb7 26.c8Q Rxc8 27.Rxc8 Rb3 .

<23.c6 Nxc1 24.Rxc1 Bf8!> Somewhat better was 23.Rb1 Nc3! 24.Rb3 Bf8! 25.c6 Bd6! .

<25.Ba6?!> Better is 25.a4.

<25...Bxa3> Even stronger was 25...Rb6! 26.Bb7 Bxa3! 27.Rc2 Bd6 .

<26.Rc4.> Better were 26.Ra1 or 26.Rc2, as the text move allows Black to call a mate in 9 moves.

<26...Rb6> The forced mate in 9 moves here goes like this: 26...Re1+! 27.Kg2 Rb2+ 28.Kf3 (or 28.Kh3 Ree2 etc. White having to give up his rook either on c5 or c2 to survive longer) Re3+ 29.Kg4 Rxh2 etc. mating 5 moves later after White giving up his rook on c5.

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