Viacheslav Diu vs Wei Yi (2017)

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Viacheslav Diu vs Wei Yi
HD Bank Cup (2017), Ho Chi Minh City VIE, rd 2, Mar-12
Semi-Slav Defense: Anti-Moscow Gambit (D44) · 1-0

ANALYSIS [x]

FEN COPIED

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Mar-17-17		sycophante: Wei Yi losing in 19 moves? With 13...h4 he might have overlooked White's reply 14.f4. White got the excellent f4 and c4 squares for his bishops.

Mar-17-17		bubuli55: Diu to Wei-n.

Mar-17-17		shintaro go: LOL....

Mar-17-17		fisayo123: The most humiliating loss of his career.

Mar-17-17		protonchess: It looks illogical to play 10. .. a6 only to follow up with 11. .. b4. a6 just ends up being a totally wasted move. The whole game looks like it was played minutes after Black got out of bed.

Mar-17-17		cro777: Wei Yi confessed to his coach that he felt ashamed of this game (an instructive example of chess self-destruction). He opted for a very rare line of the Anti-Moscow Gambit (10…a6 instead of 10…Nbd7) which led to an interesting and unclear game. Position after 11.Ne5 click for larger view In this line Black has the possibility of taking the pawn on c4 and retaining his kingside pawns, but his position has some drawbacks: White has a strong pawn centre, a lead in development and Black's pieces are more passive. Here, Wei Yi made two apparently self-destructive moves: 11…b4? and 12…h5? (it was necessary to continue the development by playing …Nbd7). click for larger view 13.f4! Opening the f line for a crushing attack followed. An experienced player like Diu couldn’t miss it.

Mar-17-17		cro777: Far East Barracuda Wei Yi's opponent deserves to be credited for this fine victory. IM Viacheslav Diu (2421), a former Russian Far East Region champion, is a very experienced player. His score against grandmasters in this tournament is +1 =1 -1. Diu lives in Khabarovsk, in the Russian part of the Far East, located 30 kilometers from the Chinese border. He is usual participant of HDBank Masters in Vietnam. https://i0.wp.com/www.spraggettonch...

Mar-18-17		alexmagnus: Interestingly, in this tournament Wei scored both his quickest loss and his quickest win in this database.

Mar-19-17		cro777: Anatomy of a loss – What can we learn from this game? 10…a6 is not the best move in this variation of the Anti-Moscow Gambit, but it is playable. As mentioned above, the decisive mistakes were 11…b4? and, especially, 12…h5?. 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 h6 <Semi Slav - Moscow variation> 6. Bh4 <Anti-Moscow Gambit: Black can remain a pawn up after …dxc4. In return, White creates a strong centre by playing e4> dxc4 7. e4 g5 8. Bg3 b5 9. Be2 Bb7 10. O-O click for larger view 10… a6!? A very rare line (the main line is 10…Nbd7). 11. Ne5 b4? (11…Nbd7) 12. Na4 h5? (12…Nbd7) Interestingly, Wei Yi three times avoided to play the principled move …Nbd7 (to prevent or restrain the activity of the white knight on e5). Why did Wei Yi play these self-destructive moves? Probably, a part of the answer lies in the following analysis.

Mar-19-17		cro777: About the pawn advance …b4. Black’s pawn advance …b4 in this variation (Anti-Moscow Gambit with 9.Be2) doesn't have a good reputation. However, if Black wants to play this move, the proper moment is immediately after 9.Be2: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5 9. Be2 click for larger view 9…b4!? <A rare continuation (the main line is 9….Nbd7). Black wants to grab the pawn on e4.> 10. Na4 Nxe4 11. Be5 Nf6 12. Rc1 Nbd7 click for larger view The position is much easier to play as White. That's why Black rarely opts for this line.

Mar-19-17		cro777: A differred …b4 is a serious mistake. Wei Yi played …b4 after 9. Be2 Bb7 10. O-O a6 11. Ne5 click for larger view 11…b4? <Black loses control of the important square c4 for free. Here, the pawn grab 12…Nxe4 (after 12.Na4) is refuted by 13.Bh5 (after 12…Rh7) followed by Qg4.> The correct move was 11...Nbd7! Moreover, after 12. Na4 Wei Yi committed the decisive error by playing 12… h5? <He probably played this move automatically (in the main line 10…Nbd7 11.Ne5 Black has tried 11…h5), missing the strength of White’s reply 13.f4! opening the f line for a crushing attack.> Again, the correct move was …Nbd7: 12…Nbd7 13. Qc2 c5 click for larger view White is clearly better but the position is complex and Black can still play on in the hope of the mistake by the opponent.

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