TWIC 1427 (2022.03.14)Summary - white scored 3/6. Added references: - Schwarz (1969) Aljechin- und Nimzowitsch-Verteidigung
#1 Maranhao - Toncheva, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.d4 d6 5.f4 5...g6 6.Nf3 (N) - 6.Nc3 Bg7 7.Be3 Be6 --4pa-twic1426 #1
6...Bg7 7.a4!? - 7.Be2 O-O 8.O-O Be6 9.Nbd2 --Davies (2001), page 128
- 7.Nc3 Be6 8.d5 Bg4 cf. 4pa-twic1426 #1 (6.Nc3)
7...O-O!? - 7...a5 --1 game in database.chessbase.com
8.a5 N6d7 9.Be2 c5 10.O-O - 10.d5 dxe5 11.Nc3 Na6 12.O-O Nb4 13.Be3 exf4 14.Bxf4 Nf6 15.Be3 Na6 = Deep Shredder 13. One suspects this cannot be best play for either side.
10...cxd4 11.exd6 Nc6 12.dxe7 Qxe7 It's the worst looking King's Indian Four Pawns Attack I have seen in a while. I changed the black pawn from d4 to d6, and the engine still preferred black a tiny bit. (0:1, 23) #2 Yi Xu - Hnydiuk, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 5...dxe5 6.fxe5 Nc6 7.Nf3 7...Bg4 8.Be3 e6 9.Be2 Bxf3 10.gxf3 (N) - 10.Bxf3? Nxc4 --4pa-twic1424 #4
10...Qh4+ 11.Bf2 Qf4 12.c5 Nd5 13.Bb5 - 13.Nc3 cf. Atalik - de Firmian, but with white to move
13...Be7 14.Nc3 O-O - 14...Rd8 --2 games in database.chessbase.com
- 14...Ne3 15.Qd3 Bh4 =+ Deep Shredder 13
15.Nxd5 exd5 16.O-O f6 = (1:0, 50) #3 Nazari - Babazada, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 5...dxe5 6.fxe5 Bf5 7.Nc3 e6 8.Be3 8...Be7 Technically a new move for this series, but it's transpositional. - 8...Bb4 --4pa-twic1424 #2 and #3
9.Be2 - 9.Nf3 O-O (9...Nc6) 10.Bd3 --Bogdanov (2009), page 50
9...O-O 10.Nf3 f6 11.O-O - 11.exf6 --4pa-twic1427 #6
11...Nc6 12.b3 (N) - 12.exf6 --4pa-twic1427 #5
12...Qe8 - 12...fxe5 --4 games in database.chessbase.com
- 12...Bb4 --1 game in database.chessbase.com
13.Qe1 fxe5 - 13...Nb4 (thematic) 14.Rd1 Nc2 15.Qd2 Nxe3 16.Qxe3 (Bagirov is contemptuous of giving up the bishop pair in a similar position, but the engine still prefers white.) 16...fxe5 17.Nxe5 Nd7 18.g4 (no fear) 18...Bc2 19.Rxf8+ Bxf8 20.Rf1 Nxe5 21.Qxe5 Bd6 22.Qe3 += Deep Shredder 13
14.Nxe5 Nxe5 15.dxe5 Rd8 16.Nb5 a6 17.Nd4 Qg6 18.Nxf5 18...exf5?! += - 18...Rxf5 close to equality
(1:0,27) #4 Aaditya - San Thit Lwin, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.d4 d6 5.f4 5...dxe5 6.fxe5 Nc6 7.Be3 Bf5 8.Nc3 - 8.a3 idea Nb1-d2 --Schwarz (1969), pages 38-40
8...e6 9.a3 (N) - 9.Be2 Be7 10.Nf3 O-O 11.O-O f6 12.exf6 Bxf6 13.a3
9...Be7 10.Nf3 f6 11.exf6 Bxf6 12.Be2 O-O 13.O-O Black has tried 9 different moves in database.chessbase.com . 13...Bg4 - 13...Qe7 most popular 14.c5 Nd5 15.Nxd5 exd5 16.Bf2 Rae8 17.Bd3 Bxd3 = (1:0,47) Aaditya - San Thit Lwin, Titled Tue, chess.com 2022.01.18 (17...Be4 =+)
- 13...Qd7 second-most popular, engine suggestion
- 13...Qe8 --4pa-twic1427 #5
14.d5 Bxf3 - 14...exd5 --1 game in database.chessbase.com (by transposition from 8.a3)
15.Bxf3 Nxc4 16.dxc6? Nxe3 (0:1,27) #5 Desideri - Hnydiuk, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 5...dxe5 6.fxe5 Nc6 7.Be3 Bf5 8.Nc3 e6 9.Be2 Be7 10.Nf3 O-O 11.O-O f6 12.exf6 Bxf6 13.a3 A new move but not a new position. It was already reached by transposition in 4pa-twic1427 #4. 13...Qe8 (N) - 13...Bg4 --4pa-twic1427 #4
14.d5?! =+ - 14.Qe1 --1 game in database.chessbase.com
- 14.Bf4 --1 game in database.chessbase.com
14...exd5 15.Bxb6 axb6 16.Qxd5+ Kh8 17.Qxf5 Bxc3 18.Nd4?? Bxd4+ 0-1 #6 Sanal - Bashirli, Titled Tue, chess.com 2022.03.081.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 5...dxe5 6.fxe5 Bf5 7.Be3 e6 8.Nc3 8...Be7 Already seen in 4pa-twic1427 #3. 9.Be2 O-O 10.Nf3 f6 11.exf6 Bxf6 12.O-O Nc6 13.Qd2 13...Qe7 (N) - 13...Qe8 --4pa-twic1425 #3
14.Rad1 Rad8 15.h3 Most sources give only 15.Qc1 here. Schwarz (1969), Bagirov (1974), and Hort (1981) give the same three moves: 15.Qc1, 15.c5, and 15.Qe1. 15...h6 16.b3 Qe8 - 16...Kh8 --1 game in database.chessbase.com
- 16...Nb4 --1 game in database.chessbase.com
17.Qe1 Rf7 18.Qg3 Kh8?! 19.Ne5 Nxe5? +/- (1:0,49)
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