[Event "?"]
[Site "Saint Louis"]
[Date "2023.??.??"]
[Round "?"]
[White "Alapin and 2.Nf3 3.c3"]
[Black "?"]
[Result "*"]
[ECO "B50"]
[Annotator "Boris"]
[PlyCount "28"]
[EventDate "2015.04.01"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "USA"]
[EventCategory "16"]

1. e4 c5 2. Nf3 (2. c3 d5 3. exd5 Qxd5 4. d4 (4. Nf3 Nf6 5. Na3 (5. d4) 5...
Nc6 6. Bc4 (6. d4 Bg4) 6... Qd8 7. O-O e6 8. d4 a6 {[%csl Gb5][%cal Gb7b5,
Gc8b7]} (8... cxd4 9. Nb5 {[%cal Gc1f4]}) 9. dxc5 Qxd1 10. Rxd1 Bxc5 11. Nc2
Bd7 $146 (11... b5 12. Be2 {[%cal Ga2a4]}) 12. Bf4 Rc8 $11 {[%cal Ge8e7,Gh8d8]}
) 4... Nf6 (4... g6 $5) 5. Nf3 (5. Be3 Bg4 6. Nf3 (6. f3 Qe6 7. Qe2 (7. Bb5+
Nc6 8. Qe2 cxd4 (8... Bf5 9. dxc5 a6 $44 {[%csl Gg1,Gh3]}) 9. Bxd4 Qxe2+ 10.
Nxe2 Bd7 11. Bxc6 Bxc6 12. c4 e6 13. Nbc3 Be7 $15 {[%csl Gc6,Ge7]}) 7... Bf5 8.
dxc5 Nc6 $44) 6... cxd4 (6... Bxf3 7. Qxf3 Qxf3 8. gxf3 cxd4 9. Bxd4 a6 $11) 7.
cxd4 (7. Qxd4 Qxd4 8. Nxd4 Nd5 9. h3 Bd7 $11 {[%cal Ge7e5]}) 7... Bxf3 8. gxf3
e6 9. Nc3 Bb4 10. a3 Bxc3+ 11. bxc3 O-O 12. Bd3 {0-1 (29) Blechzin,I (2400)
-Loginov,V (2500) St Petersburg 1998} Nc6 $15) (5. dxc5 Qxc5 6. Be3 Qc7 7. Na3
a6 {[%csl Gb5]} 8. Nc4 Nbd7 {[%csl Gb6]} 9. a4 b6 10. Nf3 Bb7 11. Be2 {1-0 (34)
Jobava,B (2582)-Maisuradze,N (2222) Europe Echecs INT 2021} e5 12. O-O Nd5 $11)
5... Nc6 6. Be2 (6. Be3 Bg4 7. Be2 (7. c4 Qh5 8. d5 Nd4 9. Bxd4 cxd4 10. Be2 e5
11. dxe6 O-O-O 12. Qb3 Qa5+ 13. Nbd2 Ne4 14. Qb5 Bb4 15. Qxa5 Bxa5 $19 {
0-1 (22) Lyell,M (2238)-Ward,C (2437) Bournemouth 2016}) (7. dxc5 Qxd1+ (7...
e6) 8. Kxd1 Nd5 9. Bb5 {ctr f7} (9. Bc4 O-O-O 10. Nbd2 e5 11. Ke2 f6 $44)) 7...
e6 8. O-O (8. dxc5 Qxd1+ 9. Bxd1 Nd5 10. Ba4 Nxe3 11. fxe3 Bxf3 12. gxf3 Bxc5
13. Ke2 Rc8 $11 {0-1 (30) Kong,P-Chen, Y (1594) Changsha 2019}) (8. h3 cxd4 9.
cxd4 Bb4+ 10. Nc3 Bxf3 11. Bxf3 Qc4 12. Qb3 Qxb3 13. axb3 Nd5 14. O-O Rd8 15.
Nxd5 exd5 $11 {1/2 (35)-1/2 (35) Carvalho,L (2298)-Silva Filho,A (2232) ICCF
email 2015}) 8... cxd4 9. Nxd4 (9. cxd4 Be7 10. Nc3 Qd6 11. h3 Bh5 12. Qb3 O-O
(12... Qb4 13. g4 Bg6 14. Ne5 $36) 13. Rfd1 Rfd8 14. a3 a6 15. Rac1 h6 {
complex game}) 9... Bxe2 10. Qxe2 Be7 11. Rd1 O-O 12. c4 (12. Nd2 Rfd8 13. N2f3
Ne5 $11) 12... Nxd4 13. Bxd4 Qc6 14. Nc3 Rfd8 15. b3 a6 16. a4 Rd7 (16... Nd7
17. h3 Rac8 {0-1 (64) Rabiega,R (2505) -Shevchenko,K (2652) Germany 2022}) 17.
Rd3 Rad8 18. Rad1 h6 $11 {1/2-1/2 (18) Sepp,O (2460)-Rychagov,M (2485) Finland
1995}) (6. dxc5 Qxd1+ (6... Qxc5 7. Be3 $14) 7. Kxd1 Bf5 8. Be3 (8. Bb5 O-O-O+
9. Ke1 (9. Ke2 e5 10. b4 Nd5 {[%cal Gf5b1,Gf7f6,Gg7g5]}) 9... e5 10. Be3 Nd5
11. Bxc6 (11. b4 f6 $44 {[%csl Re1]}) 11... bxc6 12. Nxe5 Re8 {[%csl Ge1]} 13.
Nxf7 Rg8 {[%cal Gf8c5]} 14. Nd2 Bxc5 15. Nc4 {[%cal Gc4d6]} Kc7 16. Nfe5 Bxe3
17. fxe3 Nxe3 18. Nxe3 Rxe5 19. Kf2 Rf8 (19... Rb8 20. b3 Bd3 21. Rhe1 {
1/2-1/2 (21) Dijon,J (2461)-Walczak,P (2504) ICCF email 2018}) 20. Rhe1 {
1/2-1/2 (20) Tinture,L (2460)-Sommerbauer,N (2422) ICCF email 2016} Bg6+ 21.
Kg1 Rfe8 $11) 8... Nd5 9. Kc1 (9. Bb5 e5 10. Bxc6+ bxc6 {ctr f7}) 9... e5 {
[%cal Gd5e3,Gf8c5]} 10. b4 {1/2-1/2 (69) Hovhannisyan,R (2601)-Zwirs, N (2481)
Hoogeveen 2022} a5 11. b5 (11. Bb5 f6 {[%csl Ge5][%cal Ga5b4]}) 11... Nce7 {
[%csl Gc5][%cal Ge7g6]} 12. Nxe5 (12. Bc4 f6 {[%csl Gc5][%cal Gd5e3]}) 12...
Nxe3 13. fxe3 Ng6 14. Bd3 Bxc5 15. Bxf5 Nxe5 16. e4 Rd8 $44 {[%csl Gc1] 0-1 
(43) Lanin,B (1928)-Vyzharov,I (2144) LSS email 2008}) (6. Na3 $6 Bg4 7. Be2
cxd4 8. Nb5 {[%cal Gb5c7]} O-O-O 9. Nbxd4 e5 10. Nxc6 Qxc6 11. Qb3 Be6 12. Qb5
Qxb5 13. Bxb5 Bc5 14. O-O Ne4 {[%cal Gf7f6]} 15. Nxe5 {1-0 (30) Sengupta,D 
(2484)-Sethuraman,S (2639) Pune 2023} Nxf2 16. Rxf2 Rd5 $1 {[%csl Gb5,Ge5]})
6... cxd4 7. cxd4 e6 8. O-O (8. Nc3 Qd6) 8... Be7 9. Nc3 Qd6 10. Nb5 (10. Be3
O-O 11. Rc1 (11. a3 b6 12. Rc1 Bb7) 11... Rd8 (11... b6 12. Nb5 Qd7 13. Ne5
Nxe5 14. dxe5 Nd5 15. Nc7 Nxe3 16. fxe3 Rb8 $11) 12. a3 b6 {[%cal Gc8b7]} 13.
Nb5 Qd7 14. Ne5 Nxe5 15. dxe5 Nd5 $11 {1-0 (43) Uribe Arteaga,D (2220)-Ruiz
Castillo,J (2107) Cali 2010}) (10. Bg5 O-O 11. Qd2 (11. Rc1 Nd5 12. Bxe7 (12.
Ne4 Qd8) (12. Be3 Rd8) 12... Ncxe7 {[%csl Gd5]} 13. Ne5 b6 {[%cal Gc8b7]})
11... b6 12. Rac1 (12. Rad1 Bb7 13. Rfe1 {0-1 (57) Mamedyarov,S (2770)
-Nepomniachtchi,I (2789) chess24.com INT 2021} Nd5 14. Bd3 Ncb4 15. Bxe7 Qxe7
16. Be4 Nf6 17. Bxb7 Qxb7 $15 {1/2-1/2 (41) Kiefhaber,V (2215)-Bielicki,B 
(2140) Rinteln 1994}) 12... Bb7 13. Rfd1 Rfd8 14. Bf4 Qd7 15. h3 {1/2-1/2 (67)
Abdusattorov,N (2713)-Gukesh,D (2725) Kolkata 2022} Qe8 16. Qe1 {0-1 (43)
Breuers,F-Chuchelov,V (2435) Goch 1991} Rac8 $15) 10... Qd8 11. Bf4 Nd5 {
[%csl Gc7]} 12. Bg3 O-O 13. Rc1 (13. Bc4 a6 14. Nc3 (14. Bxd5 exd5 (14... axb5
15. Be4 f5 16. Bxc6 bxc6 17. Be5 Qd5 $13) 15. Nc7 Rb8 {[%csl Gb8][%cal Gc6b8]}
16. Ne5 Bf6 17. Rc1 Bxe5 18. Bxe5 Bf5 {[%cal Gb8c8]} 19. Qf3 (19. Nxa6 Nxe5 20.
Nxb8 {[%csl Gb8]} Nd3) 19... Nxe5 20. Qxf5 Nc6 21. Nxd5 Nxd4 22. Qe4 Ne2+ 23.
Qxe2 Qxd5 $11 {1/2 (34)-1/2 (34) Xu,Y (2502)-Xue, H (2341) Fuling 2023}) 14...
Nxc3 15. bxc3 b5 16. Bd3 Bb7 17. a4 b4 18. Rb1 a5 19. Qe2 {0-1 (51) Skatchkov,
P (2295)-Fokin,S (2370) Ekaterinburg 1996} Qd7 $15) 13... Bd7 (13... a6 14. Nc3
Nf6 $13 {[%cal Gf6h5]} (14... Nxc3 15. bxc3)) 14. Nc3 (14. Nd6 Bxd6 15. Bxd6
Nce7 {[%cal Gd7c6,Gd7a4]} 16. Ba3 Re8 17. Ne5 Ng6 18. Qd2 {1/2-1/2 (58)
Abdusattorov,N (2734)-Praggnanandhaa,R (2690) Dusseldorf 2023} a6 {[%cal Gd7b5]
} 19. Bf3 Bb5 20. Rfe1 Rc8 $11) 14... Rc8 (14... Qb6 15. Bc4 Nf6 16. Na4 Qa5
17. Nc5 Bc8 18. a3 $14) (14... Bf6 $5 15. Ne4 Nce7 16. Nxf6+ gxf6) 15. Nxd5
exd5 16. Qb3 Qb6 17. Qxb6 (17. Qxd5 Be6) 17... axb6 {[%csl Gb6,Gb7]} 18. Bb5 f6
{[%csl Ge5]} 19. Rfe1 Kf7 $11 {1/2 (37)-1/2 (37) Stevic,H (2565)-Gupta,A (2607)
Germany 2023 Alapin [Avrukh,B]}) 2... d6 3. c3 Nf6 4. Be2 (4. Bd3 Nc6 5. Bc2
Bg4 6. h3 Bh5 7. d3 e6 8. Nbd2 (8. Bf4 d5 9. g4 (9. Nbd2 Bd6 10. Bxd6 Qxd6 11.
Qe2 Qc7 12. Qe3 (12. g4 Bg6 13. h4 dxe4 $146 14. dxe4 h5 15. g5 Nd7 $13 {
[%csl Ge5,Gf4]}) 12... Qb6 13. Rb1 {1-0 (37) Ghaem Maghami,E (2603)-Pashikian,
A (2442) Lahijan 2005} O-O 14. O-O Rfd8 $11) 9... Bg6 10. Nbd2 Bd6 11. e5 Bc7 {
[%csl Gf4]} 12. Qe2 Nd7 13. O-O-O b5 $40 {0-1 (32) Jobava,B (2705)-Navara,D 
(2726) Heraklio 2017}) (8. O-O Be7 9. Nbd2 d5 10. g4 Bg6 11. Qe2 (11. Nh4 Qc7)
11... Qc7 12. Nh4 O-O-O 13. f4 c4 $40 {0-1 (28) Labuz,L-Kas,R Poland 1994} 14.
dxc4 Bxe4 {[%csl Ge7,Gh4][%cal Ge7h4]}) 8... Be7 9. Nf1 (9. Qe2 Qc7 10. g4 (10.
Nf1 d5 11. Ng3 Bg6 12. O-O h6 13. e5 (13. Re1 O-O-O) 13... Nd7 14. d4 (14. Re1)
14... Bxc2 15. Qxc2 O-O-O $11) 10... Bg6 11. Nh4 (11. d4 cxd4 12. cxd4) 11...
d5 12. Ndf3 (12. Ng2 h6 13. f4 O-O-O 14. Nf3 {0-1 (48) Poluektov,Y-Klerides,P 
(2290) Cyprus 1997} (14. O-O Bh7 {[%cal Gg7g5]} 15. e5 Nd7 16. Nf3 Rdg8 $36 {
[%cal Gg7g5]}) 14... c4 $17) 12... c4 13. Nxg6 cxd3 14. Bxd3 hxg6 15. exd5 exd5
{[%cal Gf6g4]} 16. g5 Nh5 $15) (9. g4 Bg6 10. Nh4 Nd7 (10... d5) 11. Ng2 (11.
Nxg6 hxg6 12. Nf3 Nde5 13. Nxe5 dxe5 $15 {[%cal Ge7g5]}) 11... h5 12. Nf4 Bg5
$1 13. Nc4 Bxf4 14. Bxf4 {1-0 (42) Ghaem Maghami,E (2549)-Banawa,J (2397) Las
Vegas 2017} d5 15. Nd6+ Kf8 16. Nxb7) 9... h6 (9... d5) 10. Ng3 (10. g4 Bg6 11.
Ng3 d5 12. Qe2 Qc7 13. Ba4 Rd8 14. Bxc6+ bxc6 15. e5 Nd7 16. Nh5 c4 17. dxc4
Nc5 $36 {1/2-1/2 (31) Jansa,V (2495)-Mortensen,E (2375) Esbjerg 1981}) 10...
Bg6 11. O-O O-O 12. Qe2 (12. d4 cxd4 13. cxd4 Rc8 {[%cal Gd6d5]}) 12... Rc8 $15
13. Nh2 d5 14. f4 c4 15. dxc4 {0-1 (44) Motycakova,M (2038)-Greeff,M (2081)
Puerto Madryn 2009} (15. e5 d4 $3 (15... cxd3 16. Bxd3 Bxd3 17. Qxd3 Nd7 {
1/2-1/2 (42) Horvath,Z (2370)-Madl,I (2308) Hungary 2019}) 16. exf6 Bxf6 17.
Ne4 dxc3 $17) 15... Nxe4 16. Nxe4 dxe4 17. Bxe4 Nd4 $40 {[%csl Ge2]}) (4. h3 {
[%csl Ge4][%cal Gd1a4]} Nc6 5. Bd3 {[%cal Gd3c2,Gd2d4]} (5. d4 cxd4 6. cxd4
Nxe4 7. d5 {[%cal Gd1a4]} Qa5+ 8. Nc3 Nxc3 9. bxc3 Ne5 10. Nxe5 Qxc3+ 11. Bd2
Qxe5+ 12. Be2 g6 13. O-O Bg7 14. Bb5+ Kf8 $17 {[%csl Gd5]}) 5... g6 6. Bc2 (6.
O-O Bg7 7. Bc2 e5) 6... e5 7. d4 {[%cal Gd4d5]} (7. O-O Bg7 8. d3 O-O 9. a3 (9.
Re1 h6 10. Be3 Be6 (10... Re8 11. Nbd2 b6 12. d4 exd4 13. cxd4 Nb4 14. Bb1 {
0-1 (51) Galego,L (2451)-Atalik,S (2575) Berlin 2000} cxd4 15. Nxd4 Bb7 $132)
11. d4 exd4 $146 12. cxd4 d5 13. e5 Nd7 $132) 9... d5 10. b4 Qc7 {[%csl Ge5]}
11. Bg5 (11. bxc5 dxe4 12. dxe4 {[%cal Gc8e6,Gc6a5]} Be6 $15) 11... dxe4 12.
dxe4 Rd8 13. Qe2 Be6 $15 {0-1 (38) Chandler,J (1692)-Brunner,R (2212) ICCF
email 2012}) 7... cxd4 8. cxd4 exd4 9. Nxd4 Bg7 10. Be3 (10. O-O O-O 11. Nc3 (
11. Nb5 d5 12. exd5 Nxd5 $15) 11... d5 12. Nxc6 bxc6 13. exd5 Nxd5 14. Nxd5
cxd5 $11 {[%cal Gc8a6,Ga8b8]}) 10... O-O 11. Nc3 (11. O-O) 11... d5 12. O-O
dxe4 (12... Nxe4 13. Nxe4 Bxd4 14. Bxd4 Nxd4 15. Qxd4 dxe4 $11) 13. Nxc6 bxc6
14. Nxe4 Ba6 15. Re1 Nxe4 16. Bxe4 Bxb2 17. Rb1 Bc3 18. Qxd8 Raxd8 19. Rec1 Bd4
20. Bxd4 Rxd4 21. Bxc6 $11 {1/2-1/2 (27) Hansen,S (2583)-Grandelius,N (2678)
Malmo 2018}) (4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. d3 e6 7. O-O Be7 8. Re1 {[%cal
Gd3d4]} O-O 9. d4 (9. Nbd2 Nc6 10. Nf1 Rfc8 11. Ng3 Ne5) 9... d5 10. e5 Ne4 $11
) (4. Qc2 Qc7 {[%cal Gc7c2]} 5. Be2 (5. d4 cxd4 6. Nxd4 g6) 5... g6 (5... Bg4 {
[%cal Ge7e6]}) 6. O-O Bg7 7. h3 b6 8. d3 Bb7 9. Bg5 h6 10. Bf4 Nbd7 11. Nbd2
O-O 12. Bh2 e5 13. Rac1 d5 $15 {0-1 (55) Finkel,A (2467)-Avrukh,B (2625) Ramat
Aviv/Modiin 2000}) 4... g6 (4... Nc6 5. d4) 5. O-O Bg7 6. Re1 (6. Bb5+ Bd7 {
More solid} 7. Bxd7+ Nbxd7 8. Re1 (8. Qe2 O-O 9. d4 e6 $5 10. e5 (10. Bg5 Qb6
$146 11. Na3 cxd4 12. cxd4 Rac8) (10. Bf4 Qb6 11. Na3 Rfc8) 10... Nd5 $1 11.
Bg5 Qc7 (11... Qb6 $5 {[%csl Gb1]}) 12. exd6 Qxd6 13. Nbd2 cxd4 14. Nxd4 h6 $15
{0-1 (50) Domingo Gadea,J (1896)-Duttagupta,A (1865) FICGS email 2017}) 8...
O-O 9. d4 (9. h3 Ne5 $1 10. d3 (10. Nxe5 dxe5) (10. d4 Nxf3+ 11. Qxf3 Nd7 12.
d5 b5 $15) 10... Nxf3+ 11. Qxf3 Nd7 $11) 9... Rc8 10. Nbd2 (10. e5 dxe5 $1 11.
dxe5 Ng4 12. e6 (12. Bf4 Ndxe5 {[%csl Gd1]}) 12... Nde5 13. exf7+ (13. Nxe5
Nxe5 14. Qb3 {0-1 (34) Akopian,V (2675)-Bok,B (2598) Doha 2016} Qc7 15. Nd2 c4
16. Qc2 f5 17. b3 cxb3 18. Qxb3 Nd3 $19 {0-1 (34) Akopian,V (2675)-Bok,B (2598)
Doha 2016}) (13. Ng5 f6 14. Ne4 f5 $19) 13... Rxf7 14. Ng5 Rf8 15. Qxd8 Rfxd8
$15) (10. h3 e6 11. Bf4 (11. e5 Nd5) 11... Re8 $1 12. Bxd6 (12. Bh2 Qb6 13.
Nbd2 cxd4 14. cxd4 Bf8 15. Re3 e5 16. Rb3 Qa6 $11) 12... Nxe4 13. Be5 Nef6 14.
Nbd2 cxd4 15. Bxd4 a6 $11) (10. d5 c4 $1 11. Na3 Nc5 12. Nxc4 Ncxe4 13. Ne3 Re8
14. Nd4 Qb6 15. a4 a6 16. a5 Qc7 $11 {0-1 (30) Biliskov,V (2281)-Cvitan,O 
(2506) Split 2016}) 10... cxd4 11. cxd4 Qc7 {[%cal Gc7c2]} (11... e5 $5 12.
dxe5 (12. d5 $6 Nc5 $17) 12... Nxe5 $1 $15 13. Qb3 Nfd7 $1) 12. Nb3 Qc2 $15 {
Aronian - Artemiev, 2019}) (6. d3 O-O 7. Be3 (7. Nbd2 Nc6 8. Re1 e5 9. Nf1 (9.
a3 h6 (9... a5 10. a4 d5 11. exd5 Nxd5 12. Nc4 b6 $15) 10. b4 a6 $5 11. Bb2 Re8
12. Bf1 Be6 $5 13. d4 $140 exd4 14. cxd4 Nd7 $15) 9... d5 10. Ng3 Be6 11. Ng5
Bd7 12. Bd2 d4 $15) 7... Nc6 (7... b6) (7... c4) 8. Nbd2 e5 9. a3 h6 10. h3 Be6
11. b4 {0-1 (47) Aronian,L (2781)-Nepomniachtchi,I (2784) Chess.com INT 2020}
Nd7 {[%cal Gf7f5]} 12. Nc4 Qc7 {[%cal Gf7f5]}) 6... O-O 7. Bf1 Nc6 (7... Bg4)
8. d4 (8. h3 e5 9. d3 (9. d4 cxd4 10. cxd4 exd4 11. Nxd4 Nxd4 12. Qxd4 Re8 {
[%cal Gf6e4]} 13. Qd3 Bf5 {[%csl Ge1]} (13... d5) 14. Nc3 Nxe4 15. Nxe4 Rxe4
16. Rxe4 d5 17. Qb3 Bxe4 18. Qxb7 Qc8 $36 {[%csl Gb2][%cal Gg7b2]}) 9... d5 10.
Nbd2 Re8 11. a3 d4 12. cxd4 cxd4 13. b4 a6 14. Nb3 b6 {[%csl Ga5,Gc5]} 15. Nfd2
Be6 16. Nc4 Nd7 17. Bd2 Qe7 $15 {0-1 (44) Faber,K (2113)-Keevil,P (2231) ICCF
email 2017}) 8... cxd4 9. cxd4 Bg4 10. d5 (10. Nc3 Bxf3 11. gxf3 Nh5 $1 12. Ne2
(12. Be3 e5 $1 $17 {[%cal Gc6d4,Gh5f4,Gd8h4]}) (12. d5 Nd4 13. f4 e5 14. dxe6
fxe6 15. Be3 e5 $36) 12... e6 13. Be3 d5 14. Qd2 (14. e5 Qh4 {[%cal Gf7f6]})
14... e5 15. dxe5 Nxe5 16. Bg2 dxe4 17. fxe4 Qxd2 18. Bxd2 Nd3 $17 {[%csl Gb2]
0-1 (56) Khademi,M (2276)-Ghaem Maghami,E (2570) Rasht 2016}) 10... Ne5 11.
Nbd2 (11. Be2 Nxf3+ 12. Bxf3 Bxf3 13. Qxf3 Rc8 $15 {[%cal Gf6d7,Gd8a5]}) 11...
Qa5 {[%csl Ge1]} (11... Qb6 $5 $146 12. h3 Bxf3 13. Nxf3 Nxf3+ 14. Qxf3 Nd7 15.
Qd1 Rfc8 16. Rb1 Bd4 17. Re2 Rc7 $11) 12. Re3 Rfc8 13. h3 Bxf3 (13... Nxf3+ 14.
Nxf3 Bxf3 15. gxf3 (15. Qxf3 Bh6 $1 $17 {[%csl Gc1,Ge3]}) 15... Nd7 $11) 14.
Nxf3 Nfd7 $15 *