Wieder,M (2052) - Feuerstein,A (2200) [B23]

Deep Freeze Quads (2),

[Notes by Mark Wieder and Fritz 5.32 (60s)]

B23: Closed Sicilian: Lines without g3
1.e4 c5 2.Nc3 e6 3.g3 a6 4.Bg2 Qc7 [4...b5 5.d3 Bb7 6.Nf3
(6.f4 d6 7.Nf3 Nf6 8.0-0 Be7 9.h3 h5 10.Be3 Nbd7 11.f5 e5 12.Qd2 Qc7 13.Ng5 b4 14.Ne2 a5 15.a3 Nb6 16.axb4 axb4 17.c3 bxc3 18.bxc3 0-0 19.c4 Bc6 20.Nc3 Qb7 Ebenezer,J-Moradi,B/Genting Highlands 1998/CBM 63 ext/1-0 (46)
) 6...b4 7.Nb1 Nf6 8.0-0 d5 9.exd5 Nxd5 10.a3 a5 11.axb4 axb4 12.Rxa8 Bxa8 13.Be3 Be7 14.Nbd2 0-0 15.Qa1 Nc6 16.Qa6 Qc7 17.Ra1 Rb8 18.Nb3 Bb7 19.Qc4 Nxe3 20.fxe3 Qb6 21.Nfd2 Ra8 22.Rxa8+ Bxa8 23.Qf4 h6 24.Nc4 Qd8 25.Kf2 Bb7 26.Qg4 Qa8 27.Qd1 Nd8 28.Bxb7 Qxb7 29.Qa1 Nc6 30.Qa4 Kh7 31.Qa1 f5 32.Qh1 Qc7 33.Nbd2 Bf6 34.Qf3 Ne7 35.Kg2 Nd5 36.e4 Ne7 37.exf5 exf5 38.h4 Qd7 39.Nb3 Donev,I-Kaenel,H/Biel Credis 1995/EXP 48/1-0 (67)]
5.d3 b5N [5...Nf6 6.f4 d6 7.Nf3 Nc6 8.0-0 Be7 9.Be3
(9.h3 0-0 10.Bd2 b5 11.Ne2 Bb7 12.c3 Rfd8 13.Qc2 Rac8 14.g4 c4 15.dxc4 ½-½ Herold,K-Salzwedel,H/NRW-I 1996/GER 13 (15)
) 9...0-0 10.d4 Ng4 11.Qd2 Nxe3 12.Qxe3 cxd4 13.Nxd4 Qb6 14.Nf5 Qxb2 15.Nxe7+ Nxe7 16.a3 Qxc2 17.Rab1 Rb8 18.Rfc1 Nf5 19.exf5 Qxf5 20.Be4 Hurtovaja,N-Reizniece,D/WchJW-U12 Duisburg 1992/TD 92\06/1-0 (52)]
6.Nf3 Bb7 7.0-0 b4 Black gains space
[7...d6 8.a4 b4 9.Na2=]
8.Ne2 Maybe a better plan for White is 8.Nd4 followed by opening the c-file with c3.
8...Nc6 Black is behind in development. 9.Re1 Nf6 10.c3 Covers d4
10...a5 11.Nf4 h6 Secures g5 Black's plan to play g5 is risky. he has made a lot of pawn moves.
12.d4 White prepares e5
[12.e5 Nh7²]
12...g5= 13.d5 White wins space
[13.Nd3!? has some apparent merit 13...d6 14.d5=]
13...Nd8³ [Not 13...gxf4 14.dxc6 Qxc6 15.Bxf4²]
14.dxe6 [14.d6 Qxd6
(14...Bxd6?! 15.e5²) 15.e5 Qxd1 16.Rxd1 gxf4 17.exf6 fxg3 18.fxg3 d5]
14...gxf4 15.Bxf4 Qb6 16.e5 Nd5 17.exd7+ Ke7 Forced, as 17....Kd7 runs into 18. c4, regaining the piece.
18.Qd2 A key moment. White could have tried 18. Nh4 Nf4 [18...Qe6 19. Bd2 with the idea 20. Qh5] 19. Nf5+ Ke6 20. Qg4 Ng2 21. Red1 and now 21 ... h5 runs into 22. Ng7+ Ke7 23. Qg5+ f6 24. Qg6! +-, but less clear is 21 ... Ke5! 22. Ng7 Qg6! 23. Qe2+ Kf5 and it's not obvious how White should cash in on his investment of three pieces. Not that I could see this during the game.
[18.Bc1 c4=
(18...Kxd7? doesn't solve anything
19.c4+-) ]
18...Ne6³ [18...Kxd7?? the pawn of course cannot be captured 19.c4+-]
19.Be3 [19.Rad1 Ndxf4
(19...Kxd7? is no good
20.c4+-) 20.gxf4 Rg8]
19...Nxe3 Black's knight on d5 is his best piece and White's bishop on e3 has no place to go, so why exchange? Both 19 ... Bg7 and 19 ... Rd8 put White on the spot.
[19...Rd8!?]
20.Rxe3= Rd8 21.Rd1 Bxf3 21 ... Bg7 should be considered, but Black didn't want the knight to get to f5.
22.Rxf3 Qc7? [22...Bg7 23.Rf5²]
23.Rd3?? White loses the upper hand White should play 23. Qd6+ Qd6 24. ed6+ Kd7 25. Rf7+ Ke8 26. Rf6 Kd7 27. Bh3
[¹23.Qd6+ the advantage is on the side of White 23...Qxd6 24.exd6+ (‹24.Rxd6 Bg7³
(‹24...Rxd7 25.Rxf7+ Kxf7 26.Rxd7+ Be7 27.f4²) ) 24...Kxd7 25.Rxf7+ Ke8 26.Rf6 Rxd6 27.Rxd6 Bxd6 28.Rxe6+ Kd7 29.Bh3 bxc3 30.bxc3+-]
23...Bg7 If 23 ... Qe5 24. f4 Qf5 25. Rd5 is tough for Black, but better than the game.
[¹23...h5!?² is noteworthy] 24.f4± Nf8 25.Bh3 [25.Rd6 Nxd7
(25...Rxd7?? 26.Bh3+-) 26.Qe3 Nb8+-]
25...h5 [¹25...Rg8±]
26.Rd6+- h4 27.f5 Bxe5 If 27 ... f6, then 28. Qd5 +-.
[27...Nh7 28.f6+ Nxf6 29.exf6+ Bxf6 30.Qe3+ Kf8 31.Rxf6 Rh7+-]
28.Qg5+ It's mate next. [28.Qg5+ Bf6 29.Qxf6#]
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