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1.c4 e5 2.g3 Nc6 3.Bg2 g6 4.b3!?
A relatively rare continuation, but Viktor Korchnoi is among those who played it.
4...Bg7 5.Bb2 Nge7 6.e3!?
The mainline in ChessBase's 2025 Mega database runs 6.Nc3 0-0 7.e3 d6 8.Nge2 Be6 9.0-0, when Stockfish17 and Dragon1 reckon White has at least the better part of equality.
6...d5 7.Ne2
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7...Be6?!
The engines give Black a slight edge after several moves, including 7...dxc4, 7...d4 and 7...Bg4.
8.Na3?!
This was also played in the only game to reach the position in Mega25, Zaur Mammadov (2427) - David Shahinyan (2257), EU U16 Championship (Batumi, Georgia) 2010, but almost certainly better is 8.Nf4!?
8...0-0 9.0-0 d4 10.exd4 exd4 11.d3 Qd7 12.Nc2 a5 13.a3 Rfe8 14.b4 Nf5!?
The engines strongly dislike this, claiming both 14...Ne5!? and 14...Bg4 are good, eg 14...Ne5!? 15.Bxd4 Rad8 16.Bxe5 Bxe5 17.d4 Bg7, when Black is a pawn down, but has the bishop-pair and pressure against White's fourth-rank pawns.
15.Nf4 a4?!
Probably the wrong idea. After 15...axb4 16.axb4 Rxa1 17.Qxa1 Ne5!? the engines agree White is better, but not as much as in the game.
16.Re1 Rab8!?
First world correspondence champion Cecil Purdy warned against placing a rook behind an unmoved pawn, even when the intention is to quickly advance the pawn, but here the engines quite like the move.
17.Nxe6 Rxe6 18.Rxe6 Qxe6 19.Ne1!
The engines reckon this gives White a positionally won game.
19...Ra8 20.Nf3 Qe7 21.Nd2!?
But they reckon this is a knight move too many, preferring, among other continuations, 21.Bc1 (Stockfish17) or 21.Qd2 (Dragon1).
21...Nd6 22.Ne4 Nxe4
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23.Bxe4
Black has at least the upper hand after 23.dxe4?! Ne5, according to the engines.
23...Nd8 24.Qd2 c6 25.Re1 Ne6 26.Qd1!? Qd7 27.Bc1 Qd6!? 28.h4 Ra7?!
The engines prefer 28...h5, albeit giving White the upper hand.
29.Bg2 h5 30.Bh3
Even stronger seems to be the engines' 30.g4!?
30...f5?
Weakening, whereas 30...Ra8 keeps the game going.
31.Qe2 Kf7
There is no defence, eg after the engines' 31...Nf8 comes 32.Qe8 Qd7 33.Bg5, eg 33...Qxe8 34.Rxe8 b6 35.Bg2 Rc7 36.Bf4 etc.
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32.Bxf5!
Other moves also win, but this is the most convincing.
32...gxf5 33.Qxh5+ Ke7 34.Qxf5 Ra8 35.Bf4 Qd7 36.c5 Qd5 37.Bd6+ Kd7 38.Qf7+ Kd8 39.Rxe6 1-0