(1) Lenderman,GM Aleksandr (2741) - Rohde,GM Michael (2525) [E91]
Fairfield County Masters (2.1), 12.07.2015

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 Bg4
A sideline whose objective is clear: by removing White's f3 knight, Black's control of central dark squares improves. Still, a bishop is a bishop.

7.Be3 Nfd7
The other knight wants to come to c6, to work in tandem with the dark-square bishop on control of the d4 square. This knight moves to release the bishop, and prepare the advance of either e- or c-pawn.

8.Rc1 c5 9.d5
It makes sense to play this immediately, before Black develops his other knight smoothly to c6.

9...Na6 10.0-0 Nc7
We have reached a Benoni structure, a typical transformation in the KID. Black is preparing the thematic lever ...b5, challenging the hegemony of White's central pawn structure, and opening files for counter play on the queenside.

White is wise to Black's intentions.

11...a6 12.h3!
White displays an impeccable sense of timing. The bishop is needed back on e2, to contest Black's ...b5 advance. So it must take care of its business on the kingside now.

12...Bxf3 13.Bxf3 Rb8 14.Be2 e6!
Stmyied from the ...b5 advance, Black must nevertheless challenge the center. Grandmasters know that suffocation is worse than material. This is a positional pawn sacrifice, necessitated by positional considerations.

White obliges Black's "request", grabbing material and allowing counterplay. Now things will get highly tactical and murky, from the objective standpoint. Any other move keeps matters positional. [15.Qd2 exd5 16.exd5 f5 17.b3 seems to maintain a small advantage. 17...Be5 18.g3 Qf6 19.Bg5 Qf7 20.Bd3 and it's a bit unclear how Black generates more play.]

15...Nxe6 16.Qxd6 Nd4
At the cost of a pawn, Black has lodged his knight at its ideal post, somewhat disrupting the coordination of White's forces. These themes and ideas are typical to KID players.

Inviting Black's next, which activates his pieces still further. Instead, [17.Bf4 is very strong, with better control of e5 and pressure to Black's b8 rook. This makes it harder for Black to unravel. An interesting possibility, proferred by the engine, is 17...Re8 18.Rfd1 Re6 19.Qd5 Qe7 sacrificing the exchange to dominate the dark squares completely, for instance: 20.Bxb8 Nxb8 and Black's knight comes to c6, with a dominating grip on the dark squares. Rooks need open files, and White's won't have any. (The astonishing 20...Nb6!? is also possible, since White's queen is without an escape square. 21.Qxe6 Qxe6 22.b3 is unclear.) ]

A highly imbalanced position has arisen, difficult to assess objectively. These are the kinds of positions contested by professionals.

Both sides play with commendable ambition. Lenderman now sacrifices the exchange, taking his 2-pawns and bishop pair, and dismantling Black's strangehold on the dark squares.

18...Nb3 19.Qd5 Nxc1 20.Rxc1 Nd3
The temperature continues to rise. Simpler was 20...Nxg4, stripping White of his prized bishop pair, but again the most ambitious continuation is selected.

21.Rb1 Nxb2 22.Rxb2 Bxc3 23.Rb3 Qf6 24.Bg5 Qd4 25.Be3 Qf6
As much as Black may want to trade queens, he does not want to unify White's pawns.

26.Bg5 Qd4 27.g3
continuing the play for the win!

27...Rfe8 28.Be3 Qe5 29.f4 Qg7?
This is wrong, as Black immolates his queen. Positionally necessary was [29...Qxd5 30.cxd5 Ba5 31.e5 b5 with some distracting counterplay, for instance 32.axb5 Rxb5 33.Rd3 Bb6 34.Kf2 Rb2+ 35.Kf3 f5 forcing White to break up his pawns. 36.exf6 Kf7 37.Be6+ Kxf6 38.Bd2 Rb1 and Black is making White's task of realizing his powerful pawns, very difficult.]

30.Bb6 a5 31.Bc7?!
Maybe a psychological strategem. Lenderman knows that Rohde doesn't want to trade queens, which is now possible with a check on d4.


32.Bxb8 Qa1+ 33.Qd1
Lenderman forces the simplification, emerging with a clear extra pawn in the endgame. Rohde, for his part, is banking on the opposite-colored bishops.

33...Qxd1+ 34.Bxd1 Rxb8 35.Rd3 Kf8 36.e5 Ke7 37.Rd5 Rc8 38.Be2 h5 39.Kg2 b6 40.Kf3 Rc7 41.Ke4 Bc5 42.g4 hxg4 43.hxg4 Rc8 44.f5 Rh8 45.f6+ Ke6 46.Kf4 Rh2?
[Rohde misses a fantastic resource: 46...g5+! 47.Kg3 and White's king has been removed from its active post, a crucial point, as Black can now work on rounding up White's extra pawn, i.e. (since 47.Kxg5 Be3# is mate!) 47...Bg1 48.Bd3 Bh2+ 49.Kf3 Bxe5 50.Ke4 Bxf6= ]

[47.Bd3 Rf2+ 48.Kg3 Rb2 49.g5 and White will bring his bishop to the h3-c8 diagonal before Black can organize a coordinated attack against e5.]

47...g5+! 48.Ke4
[48.Kxg5 Be3# ]

[48...Rf2 forcibly achieves its aim, as White is still pinned. Now Black will get his rook to f4, and regain material.]

Now it's unclear what Black's rook can accomplish.

49...Rg3 50.Rd8 Rg1 51.Re8+ Kd7 52.Ra8 Ke6 53.Re8+ Kd7 54.Rg8 Re1+??
The losing move. It was essential to prevent the intrusion of White's king. Instead, [54...Ke6= 55.Rxg5 Re1+ 56.Kd3 Re3+ wins for Black, so White would probably need to repeat.]

55.Kd5 Re3 56.Be4 Re2 57.Bf5+ Kc7 58.Rg7 Rd2+ 59.Ke4 Re2+ 60.Kd3 Rxe5 61.Rxf7+ Kd6 62.Rd7+ Kc6 63.Rd8 Re3+ 64.Kd2 Kc7 65.Rc8+ Kd6 66.Rxc5 bxc5 67.Kxe3
Ke6 1-0