Sunday 22 March 2020

Ideas Behind The Jobava-Prié (part seven)

BLACK'S most-popular response after 1.d4 d5 2.Nc3 Nf6 3.Bf4 is to open a diagonal for his dark-square bishop with 3...e6.
White usually continues 4.e3, but his most-successful move percentage-wise in ChessBase's 2020 Mega database is 4.Nb5, trying to take immediate advantage of Black not covering the b5 square.
Baadur Jobava (GM 2690) - Viswanathan Anand (GM 2782)
World Blitz Championship (Riyadh, Saudi Arabia) 2017
4...Na6
Overwhelmingly most popular, but Komodo10 very marginally prefers 4...Bd6!? 5.Nxd6 cxd6, when Black argues his central pawn-majority and half-open c file balance White's bishop-pair. Semetey Tologontegin (IM 2393) - Julio Catalino Sadorra (GM 2574), Asian Indoor Games 2017, continued 5.e3 Nc6 6.Nf3 0-0 7.Be2 Qe7 8.0-0 e5 9.Bg5 Bf5 10.Bg5!?, when Komodo10 and Stockfish10 suggest 10...Rd8 (Sadorra played 10...Bf5) with a reasonable game for Black.
Also possible is 4...Bb4 5.c3 Ba5, when Baadur Jobava (GM 2669) - Boris Gelfand (GM 2734), Eurasian Blitz Cup 2016, saw 6.a4 a6 7.b4 axb5 8.axb5 b6?! (8...Bd7!? worked out well in Michael Duggan (186 ECF) - Spanton (168 ECF), Bournemouth 2019, which continued 9.bxa5?! - 9.e3 seems better - Bxb5 10.Qb3 c6, when White's a pawn proved a major weakness and ultimately cost him the game) 9.bxa5 bxa5 10.e3, when Black's a pawn proved a major weakness (1-0, 48 moves).
5.e3 c6 6.Nc3 Nc7 7.Nf3 Bd6 8.Ne5 0-0 9.Qf3!?
Belarusian GM Vladislav Kovalev preferred the normal 9.Bd3 in wins against strong opposition  in 2015 and 2016.
How should Black proceed?
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9...Bb4!?
Previous high-level games had seen 9...c5 and 9...Nb5?! Anand's novelty seeks to take advantage of White's somewhat denuded queenside.
10.Bd3
Trying to save the b pawn by attacking the black dark-square bishop only makes matters worse, eg 10.a3? Bxc3+ 11.bxc3 Ne4, or 10.Nd3? Bxc3+ 11.bxc3 Nb5.
Possible is 10.Bg5, but the engines prefer the text.
10... Nb5
This move works now that the c3 knight is pinned.
11.0-0!?
White can save the pawn with 11.Bxb5 cxb5 12.Bg5, with an unclear position after 12...Be7.
11...Nxc3 12.bxc3 Bxc3 13.Rab1
White's lead in development gives him full compensation for the pawn, according to the engines. That makes it a difficult position for Black to play at a blitz time-control, but Anand is a speed specialist.
13...Nd7 14.Qg3
There is no mate (or perpetual) after 14.Bxh7+?? Kxh7 15.Qh5+ Kg8, eg 16.Rb3 Nxe5 17.Bxe5 f6 18.Rxc3 fxe5 19.e4 exd4 20.Rh3 dxe4 etc.
14...Nxe5 15.Bxe5 f6 16.Bd6 Rf7 17.Rb3 Ba5 18.e4?!
The engines reckon White still has decent compensation for his material deficit after 18.c4 Bc7 19.Bxc7 Qxc7 20.Qf3, although they are starting to favour Black.
18...Bc7 19.Bxc7 Qxc7 20.e5 c5 21.Bxh7+??
Seeing his compensation ebbing away, Jobava gets desperate (or simply miscalculates). 21.Qh4 keeps the game going.
21...Kxh7 22.Qh4+ Kg8 23.Rh3 Kf8 24.Qh8+ Ke7 (0-1, 33 moves).

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