[Event "EU-ch 6th"]
[Site "Warsaw"]
[Date "2005.06.30"]
[Round "12"]
[White "Erenburg, Sergey"]
[Black "Volkov, Sergey"]
[Result "1-0"]
[ECO "C06"]
[WhiteElo "2575"]
[BlackElo "2634"]
[PlyCount "151"]
[EventDate "2005.06.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 108"]
[Source "ChessBase"]
[SourceDate "2005.09.26"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
f6 9. exf6 Nxf6 10. Nf3 Bd6 11. O-O O-O 12. Bf4 Bxf4 13. Nxf4 Ne4 14. Qc1 Ng5
15. Nxg5 Qxg5 16. Ne2 Qf6 17. Qd2 a6 18. Rac1 Bd7 19. Bb1 Rf7 20. Rc3 Raf8 21.
Bc2 g6 22. Rf3 Qd8 23. Rxf7 Rxf7 24. Rd1 Qb6 25. Ba4 Na5 26. Bxd7 Rxd7 27. b3
Nc6 28. h4 Qd8 29. g3 Qf6 30. Kg2 Qf5 31. Qe3 Kf7 32. Rd2 Ke7 33. Nc3 b5 34.
Kg1 Kf7 35. Ne2 Qe4 36. Qc3 Ne7 37. Nf4 Nf5 38. Re2 Qxd4 39. Qc6 Re7 40. Rxe6
Qd1+ 41. Kh2 Qd4 42. Nh3 h6 43. Rxe7+ Nxe7 44. Qxa6 b4 45. a3 bxa3 46. Qxa3 Qc3
47. Nf4 Qc2 48. Qa7 Qxb3 49. Nxg6 Kxg6 50. Qxe7 Qf3 51. Kg1 h5 52. Kf1 Kf5 53.
Qh7+ Ke5 54. Qg7+ Ke4 55. Ke1 Kd3 56. Qg6+ Kd4 57. Qc2 Qf7 58. Qa4+ Kc3 59.
Qa3+ Kc4 60. Ke2 Qe6+ 61. Kd2 Qf6 62. Qd3+ Kb4 63. f4 Qb2+ 64. Ke3 Kc5 65. f5
Qe5+ 66. Kd2 d4 67. Qf3 Qf6 68. Qxh5 Qb6 69. f6+ Kd6 70. Qf3 Qb4+ 71. Ke2 Qc4+
72. Kf2 Qf7 73. Qf5 Qa2+ 74. Kg1 Qf7 75. g4 Qa2 76. f7 1-0

[Event "EU-chT (Men) 15th"]
[Site "Gothenburg"]
[Date "2005.08.04"]
[Round "6.4"]
[White "Fressinet, Laurent"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "B19"]
[WhiteElo "2627"]
[BlackElo "2595"]
[PlyCount "188"]
[EventDate "2005.07.30"]
[EventType "team-swiss"]
[EventRounds "9"]
[EventCountry "SWE"]
[SourceTitle "CBM 109"]
[Source "ChessBase"]
[SourceDate "2005.11.14"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.14"]
[SourceQuality "1"]
[WhiteTeam "France"]
[BlackTeam "Israel"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "ISR"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bf4 Qa5+ 12. Bd2 Qc7 13. O-O-O Ngf6 14. Ne4
O-O-O 15. g3 Nxe4 16. Qxe4 Nf6 17. Qe2 Bd6 18. c4 c5 19. Bc3 cxd4 20. Nxd4 a6
21. Nf3 Qc6 22. Ne5 Bxe5 23. Bxe5 Rxd1+ 24. Rxd1 Rd8 25. Re1 Qa4 26. b3 Qa3+
27. Kb1 Qa5 28. Kc1 Nxh5 29. Rd1 Rxd1+ 30. Kxd1 Qd8+ 31. Kc2 Nf6 32. Qe3 Qa5
33. Qf4 Qxa2+ 34. Bb2 Qa5 35. Bxf6 gxf6 36. Qxh6 Qf5+ 37. Kc3 Qxf2 38. Qf8+ Kc7
39. Qxf7+ Kb8 40. Qxe6 Qxg3+ 41. Kb4 Qf4 42. Qg8+ Ka7 43. Qg1+ Ka8 44. Qc5 Qd2+
45. Ka3 Qd8 46. b4 Kb8 47. Qe3 Qd6 48. Qe8+ Ka7 49. Qe3+ Qb6 50. Qf4 Ka8 51.
Qe4 Qf2 52. c5 Qg3+ 53. Ka4 Qc7 54. Kb3 Ka7 55. Kc4 Qc6 56. Qf5 Qb5+ 57. Kc3
Qa4 58. Qf2 Ka8 59. Qd2 Qe8 60. Qd6 f5 61. Kd4 Qb5 62. Kc3 Ka7 63. Qe5 Qf1 64.
Qd6 Qf3+ 65. Kc4 Qe2+ 66. Kc3 Qb5 67. Qe5 Qd7 68. Kc4 Qf7+ 69. Kc3 Qg6 70. Qf4
Qf6+ 71. Kc4 Qe6+ 72. Kd4 Qe1 73. Kd5 Qc3 74. Kd6 Qf6+ 75. Kd5 Qc6+ 76. Kc4 Qd7
77. Qe5 Qb5+ 78. Kc3 Qf1 79. Qd6 Qf3+ 80. Kc4 Qc6 81. Qe5 Qb5+ 82. Kc3 a5 83.
bxa5 Qxa5+ 84. Kc4 Qa4+ 85. Kd5 f4 86. Qc3 f3 87. Qe3 Qd1+ 88. Ke4 Qe2 89. c6+
Qxe3+ 90. Kxe3 bxc6 91. Kxf3 Kb6 92. Ke3 Kb5 93. Kd3 Kb4 94. Kc2 Kc4 0-1

[Event "FIDE World Cup"]
[Site "Khanty-Mansiysk"]
[Date "2005.11.29"]
[Round "1.5"]
[White "Erenburg, Sergey"]
[Black "Izoria, Zviad"]
[Result "1-0"]
[ECO "C07"]
[WhiteElo "2582"]
[BlackElo "2646"]
[PlyCount "97"]
[EventDate "2005.11.27"]
[EventType "k.o."]
[EventRounds "7"]
[EventCountry "RUS"]
[SourceTitle "CBM 111"]
[Source "ChessBase"]
[SourceDate "2006.04.04"]
[SourceVersion "1"]
[SourceVersionDate "2006.04.04"]
[SourceQuality "1"]

1. d4 e6 2. e4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. exd5 Qxd5 6. Bc4 Qd6 7. O-O Nf6 8.
Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 Bd7 11. c3 Qc7 12. Bb3 Bd6 13. h3 Bh2+ 14. Kh1
Bf4 15. Bxf4 Qxf4 16. Ba4 O-O-O 17. Bxd7+ Rxd7 18. Qb3 Rhd8 19. Qa4 e5 20. Qxa7
exd4 21. cxd4 Rc7 22. Rad1 Ne4 23. Kg1 f5 24. d5 Qd6 25. Qa8+ Kd7 26. Qa4+ Ke7
27. f3 Qc5+ 28. Kh2 Qd6+ 29. Kg1 Nf6 30. Kh1 Kf7 31. Rfe1 Re7 32. Re6 Qd7 33.
Qb3 Kg6 34. Rde1 Rxe6 35. dxe6 Qd2 36. Rg1 Qd5 37. e7 Re8 38. Qb4 b6 39. Qxb6
Rxe7 40. a3 Rb7 41. Qf2 h6 42. b4 Qd3 43. Qb2 Kh7 44. a4 Nh5 45. b5 Ng3+ 46.
Kh2 Qd6 47. Ra1 Re7 48. Qa3 Ne2+ 49. Qxd6 1-0

[Event "FIDE World Cup"]
[Site "Khanty-Mansiysk"]
[Date "2005.11.29"]
[Round "1.7"]
[White "Izoria, Zviad"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "A11"]
[WhiteElo "2646"]
[BlackElo "2582"]
[PlyCount "152"]
[EventDate "2005.11.27"]
[EventType "k.o."]
[EventRounds "7"]
[EventCountry "RUS"]
[SourceTitle "CBM 111"]
[Source "ChessBase"]
[SourceDate "2006.04.04"]
[SourceVersion "1"]
[SourceVersionDate "2006.04.04"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. Qc2 a6 5. h3 e6 6. b3 c5 7. Bb2 Nc6 8. cxd5
Nxd5 9. a3 Nf6 10. Be2 Be7 11. O-O O-O 12. d3 b6 13. b4 Bb7 14. bxc5 Bxc5 15.
Nbd2 Be7 16. Rac1 Rc8 17. Qb1 b5 18. d4 Qb6 19. e4 Na5 20. Bd3 h6 21. Ne5 Nc6
22. Ndf3 Nxe5 23. Nxe5 Rxc1 24. Rxc1 Rc8 25. Re1 b4 26. axb4 Bxb4 27. Rd1 a5
28. Nc4 Qd8 29. Ne3 Rc7 30. d5 exd5 31. exd5 Nxd5 32. Nf5 Bc3 33. Be4 Bxb2 34.
Qxb2 Qf6 35. Qd2 Nc3 36. Ne7+ Qxe7 37. Qd8+ Qf8 38. Bh7+ Kxh7 39. Qxf8 Nxd1 40.
Qd8 Rc1 41. Kh2 Nxf2 42. Qxa5 Rh1+ 43. Kg3 Ne4+ 44. Kf4 Rf1+ 45. Ke3 Rf6 46.
Qc7 Bc6 47. Qa7 Re6 48. Kf4 Nf6 49. g4 Re4+ 50. Kg3 Re5 51. Qa1 Re3+ 52. Kh2
Ne4 53. Qa6 Rf3 54. Qxc6 Rf2+ 55. Kg1 Rf4 56. Qc7 g5 57. Qc2 Kg7 58. Kh2 Nf6
59. Qc3 Rf2+ 60. Kg1 Rf4 61. Qb2 Re4 62. Kg2 Rf4 63. Kg3 Re4 64. Qa1 Rf4 65.
Qc1 Kg6 66. Qc8 Kg7 67. Qa8 Ne4+ 68. Kg2 Nf6 69. Qa1 Re4 70. h4 Rxg4+ 71. Kf3
Rf4+ 72. Kg3 Rxh4 73. Qe5 Rg4+ 74. Kh3 Rh4+ 75. Kg3 Rg4+ 76. Kf3 Rf4+ 0-1

[Event "Reykjavik op 22nd"]
[Site "Reykjavik"]
[Date "2006.03.12"]
[Round "7"]
[White "Erenburg, Sergey"]
[Black "Timman, Jan H"]
[Result "1-0"]
[ECO "C03"]
[WhiteElo "2573"]
[BlackElo "2630"]
[Annotator "Erenburg,S"]
[PlyCount "41"]
[EventDate "2006.03.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ISL"]
[SourceTitle "CBM 113"]
[Source "ChessBase"]
[SourceDate "2006.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2006.07.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Be7 4. Ngf3 Nf6 5. e5 Nfd7 6. c3 c5 7. Be2 {Quite a
rare continuation in comparison to 7.Bd3. White's main idea is to keep a
stable centre, protecting the d4 pawn with Nb3. In this case, Black cannot
punish White with c5-c4.} Nc6 8. O-O O-O {Black tried also:} (8... a5 9. a4 O-O
10. Nb3 cxd4 11. cxd4 b6 12. Bd2 Ba6 13. Bxa6 Rxa6 14. Bc3 Ra7 15. Nc1 Qb8 16.
Qe2 Qb7 17. Nd2 Qa6 18. Qxa6 Rxa6 19. Nd3 Rb8 20. f4 b5 21. axb5 Rxb5 {1-0
Korneev,O-Lempert,I/Werfen 1993/EXT 97 (55).}) (8... Qb6 9. Nb3 cxd4 10. cxd4
f6 11. exf6 Nxf6 12. Bf4 O-O 13. h3 Nh5 14. Bh2 Nf4 15. Re1 Bb4 16. Rf1 Bd6 17.
Rc1 a5 18. a4 Nxe2+ 19. Qxe2 Bxh2+ 20. Nxh2 Qxb3 {0-1 Smagin,S-Glek,I/Moscow
1999/EXT 2001 (20)}) (8... cxd4 9. cxd4 f6 10. exf6 Nxf6 11. Nb3 Bd6 12. Bg5
O-O 13. Bh4 Qe7 14. Bg3 Bxg3 15. hxg3 e5 16. dxe5 Nxe5 17. Nxe5 Qxe5 18. Qd2
Bf5 19. Rfe1 Bg6 20. Bf3 {1-0 Erenburg,S-Porat,S/Ashdod International Open
2004 (63)}) (8... a6 9. Re1 b5 10. Nf1 Qb6 11. Be3 a5 12. Ng3 Ba6 13. Rc1 h6
14. dxc5 Bxc5 15. Bxc5 Nxc5 16. Nd4 Nxe5 17. Bh5 Ncd3 18. f4 g6 19. fxe5 Nxc1
20. Qxc1 gxh5 21. Qf4 Rh7 22. Qf6 Kd7 23. Nxh5 Qd8 24. Qf2 $44 {1-0 Sznapik,
A-Knaak,R/Zakopane 1980/EXT 2002 (40)}) 9. Re1 {I decided not to hurry with
depending the pawn structure in the centre, but first to centralize my pieces.}
(9. Nb3 c4 10. Nbd2 b5 11. a3 a5 12. Re1 Nb6 13. Nf1 Bd7 14. Bf4 b4 15. Qc1
bxa3 16. bxa3 a4 17. Bg5 Na5 18. Ra2 Rb8 19. Ng3 Na8 20. Nh5 Kh8 21. Bxe7 Qxe7
22. Bd1 Rb3 $132 {0-1 Erenburg,S-Kuraszkiewicz,M/Warsaw POL 2005/The Week in
Chess 555 (62)}) 9... f6 ({Another possibility is to attack white's centre with
} 9... Qb6 10. Nb3 cxd4 11. cxd4 f6 12. Bd3 fxe5 13. dxe5 Rf7 14. Qc2 Rxf3 15.
gxf3 Ndxe5 16. Bxh7+ Kh8 17. Kg2 Qb4 18. Bd2 Qh4 19. Bd3 Bd7 20. Be3 Rf8 21. f4
Qg4+ $40 {0-1 Agouridis,A-Dvoirys,S/Ano Liosia op 2000 (30)}) (9... cxd4 {
gives White an opportunity to develop the queenside knight to b3:} 10. cxd4 f6
11. exf6 Bxf6 12. Nb3 e5 13. dxe5 Ndxe5 14. Nfd4 Nxd4 15. Nxd4 Qb6 16. Be3 Nc4
17. Bxc4 dxc4 18. Qa4 Bxd4 19. Qxc4+ Be6 20. Qxd4 $16 {1-0 Ramos,A-Ribeiro,J/
Manila 1992/TD (70)}) 10. exf6 Nxf6 11. Nf1 {Transfering the knight to the
kingside.} ({The alternative was to define the structure in the centre with
the following transfer of the queenside knight to b3:} 11. dxc5 Bxc5 12. Nb3
Bd6 $13 {, but, it looks like the centre promises the second player good
chances.}) (11. Bd3 Qb6 12. Qa4 Bd7 13. dxc5 Bxc5 14. Qh4 e5 15. b4 Be7 16.
Nxe5 Ne4 17. Nxd7 Bxh4 18. Nxb6 Bxf2+ 19. Kh1 Bxe1 20. Nxa8 Nf2+ 21. Kg1 Nxd3
22. Nc7 Nxc1 23. Nf3 Ne2+ 24. Kf1 Bxc3 25. Rd1 Ned4 26. Nxd5 Nxf3 27. gxf3 Bxb4
28. Rb1 a5 {0-1 Koniuh,S-Jasny,S/Moravia 1996/EXT 98 (28)}) ({Of course,} 11.
Nb3 {makes white's centre more stable, but after c5-c4 White has lost two tempi
} a5 $6 ({More logical is} 11... c4 12. Nbd2 Bd6 {[%cal Yd8c7,Ge6e5] following
with the breakthrough in the centre.}) 12. a4 cxd4 13. cxd4 Qb6 14. Bd3 Bd7 15.
h3 Bb4 16. Re2 Rae8 17. Be3 Qc7 18. Rc1 Qd6 19. Ne5 Nxe5 20. dxe5 Qxe5 21. Bc5
Qf4 22. Bxf8 Bxf8 23. Nxa5 Qb4 24. Nb3 Bxa4 25. Bc2 e5 26. Nd4 Bd7 27. Nf3 Qf4
28. Bb3 Bc6 29. Qd2 Qf5 30. Rce1 e4 31. Nd4 Qe5 32. Nxc6 bxc6 33. Qc3 Qb8 34.
Rd1 Qb6 35. Ba2 Kh8 36. Rc2 e3 37. fxe3 Rxe3 38. Qd4 Re1+ 39. Kh2 {1-0 Tiede,
A-Kotarski,M/Germany 2005/EXT 2006 (39)}) 11... cxd4 $146 {After White moved
the knight from the centre to f1, there is no point for Black to wait with the
capture on d4. According to my database, this position appeared for the first
time.} (11... Ne4 {Is met by} 12. Bd3) ({In the preceding game Black continued
} 11... Qc7 12. Bg5 cxd4 13. cxd4 Bb4 14. Bd2 Bd6 15. Ng3 Qb6 16. Bc3 Ng4 {
1/2-1/2 Bernai Tinajero,J-Redondo Arguelles,G/Asturias Preferente op 1998 (44)}
) 12. cxd4 {White's prospects are better, due to the passive black
light-squared bishop. That's why Black should play aggressively against
white's central pawn.} Ne4 13. Bd3 $1 Nd6 {Intending to transfer the knight to
f5.} (13... Bb4 {Doesn't lead to equality:} 14. Re2 (14. Rxe4 $5 dxe4 15. Bxe4
Bd7 16. Qd3 h6 17. d5 $44) 14... Nd6 (14... Rxf3 15. gxf3 Ng5 16. Kg2 Qf6 17.
f4 Nf7 18. Be3 Bd6 19. Ng3 Bxf4 20. Rc1 $14) 15. a3 Ba5 16. Bg5 $14) 14. Ne3 $1
{Covering the f5 spot, and at the same time, intending to occupy the e5
stronghold via the g4 square.} Bd7 {Black's plan could be transfering the
light-squared bishop to h5 via e8.} (14... Nf5 $2 15. Nxf5 exf5 16. Bf4 $16)
15. Ng4 {[%mdl 2048]} Nf5 16. Nge5 $14 {After White has succeeded to occupy
the e5 stronghold, his position became better.} Rc8 ({White is better also
after} 16... Nfxd4 17. Nxd4 Nxd4 18. Bxh7+ Kxh7 19. Qxd4 $16) 17. Bf4 ({
Worth of consideration:} 17. Nxc6 $5 bxc6 18. Bf4 $14) 17... Nfxd4 $2 ({
Better was} 17... Nh4 $1 18. Bg3 (18. Be3 Nxf3+ 19. Nxf3 Bb4 20. Bxh7+ $5 (20.
Rf1 $5) (20. Bd2 $5) 20... Kxh7 21. Ng5+ Kg8 22. Qh5 Rf5 23. Qh7+ Kf8 24. Qh8+
Ke7 25. Qxg7+ Kd6 26. Nf7+ Rxf7 27. Qxf7 {[%cal Ge3f4]} Kc7 28. Bf4+ Kb6 29.
Red1 Qe7 $13) (18. Nxc6 Rxc6 19. Nxh4 Rxf4 20. Nf3 (20. Bxh7+ $2 Kxh7 21. Qh5+
Kg8 22. Ng6 Rh4 $1 $17) 20... Bb4 21. Re3 Bd6 $11) 18... Nxf3+ 19. Nxf3 Qb6 20.
Ne5 (20. Qb1 h6) 20... Nxe5 21. Bxe5 Qxb2 22. f4 (22. Qh5 Qxf2+ 23. Kh1 Qh4 $17
) 22... Qa3 23. Re3 Rc3 24. Rh3 h6 (24... g6 25. Rxh7 $18) 25. Qd2 {[%cal
Gd3h7]} (25. Rxh6 $2 gxh6 (25... Rxd3 26. Qh5 $18) 26. Qg4+ Bg5 27. fxg5 Rc1+
$19) (25. Rg3 Bf6) 25... Rfc8 (25... Bb4 26. Rg3 Rf7 27. Rb1 $44) 26. Rf1 $44)
18. Nxd4 Rxf4 $2 {Black is allowing White to win the game with a simple
combination.} ({It was not too late to prevent white's attack on the kingside
with} 18... Nxd4 19. Bxh7+ (19. Qh5 $2 Nf5 20. g4 $2 {Is refuted by} Be8 $17)
19... Kxh7 20. Qxd4 Bc5 21. Qd3+ Kg8 22. Be3 $16 {but, the position favours
White anyway, thanks to some strongholds in the centre.}) {[%tqu "En","Please
find the best move for White.","","","d4c6","",10]} 19. Ndxc6 $1 Rxc6 (19...
Bxc6 20. Qh5 h6 21. Qg6 Kf8 22. Qxe6 (22. Qh7 Bg5 23. h4 $18) 22... Be8 23. Bh7
$18) {[%tqu "En","How would you continue white's attack?","","","d1h5","",10]}
20. Qh5 $1 g6 (20... h6 {loses as well:} 21. Qg6 Bg5 22. Qh7+ Kf8 23. g3 Rf6
24. f4 $18) (20... Rh4 21. Bxh7+ $18) {[%tqu "En","And the final accord is...",
"","","d3g6","",10]} 21. Bxg6 $1 (21. Nxg6 $6 Rf7) (21. Bxg6 hxg6 22. Qxg6+ Kf8
23. Qh6+ Kg8 24. Qxf4 $18) 1-0

[Event "Berkeley op"]
[Site "Berkeley"]
[Date "2011.01.08"]
[Round "10"]
[White "Erenburg, Sergey"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "C69"]
[WhiteElo "2600"]
[BlackElo "2605"]
[PlyCount "123"]
[EventDate "2011.01.02"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "CBM 140 Extra"]
[Source "ChessBase"]
[SourceDate "2011.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2011.03.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 Bg4 7. dxe5 Qxd1 8.
Rxd1 fxe5 9. Nbd2 Rd8 10. Re1 Bd6 11. h3 Bh5 12. g4 Bf7 13. Ng5 Ne7 14. Nxf7
Kxf7 15. Nf3 Ng6 16. Be3 Be7 17. Kg2 Ke6 18. Rad1 Rdf8 19. Rd2 Rf7 20. Red1
Rhf8 21. Ne1 Bh4 22. Nd3 Be7 23. Nc5+ Bxc5 24. Bxc5 Rc8 25. Rd8 Rxd8 26. Rxd8
b6 27. Be3 Rf8 28. Rd3 Nh8 29. Rc3 Kd7 30. Rd3+ Ke6 31. b4 Nf7 32. f4 exf4 33.
Bxf4 Nd6 34. Bxd6 cxd6 35. Ra3 Ra8 36. Kf3 Ke5 37. Ke3 a5 38. bxa5 Ra6 39. c3
b5 40. Kd3 c5 41. c4 b4 42. Ra4 g5 43. Kc2 Kf4 44. Kb3 Kg3 45. a3 bxa3 46. Rxa3
Kxh3 47. Ka4+ Kxg4 48. Kb5 Ra8 49. Kc6 h5 50. Kb7 Rh8 51. a6 h4 52. a7 h3 53.
a8=Q Rxa8 54. Rxa8 Kf3 55. Kc6 Kxe4 56. Kxd6 Kd4 57. Rg8 h2 58. Rh8 Kxc4 59.
Ke5 Kd3 60. Rh3+ Kd2 61. Ke4 h1=Q+ 62. Rxh1 1-0

[Event "Washington College final"]
[Site "Washington DC"]
[Date "2011.04.02"]
[Round "1"]
[White "Erenburg, Sergey"]
[Black "Ramirez Alvarez, Alejandro"]
[Result "1-0"]
[ECO "C03"]
[WhiteElo "2616"]
[BlackElo "2594"]
[Annotator "Erenburg,S"]
[PlyCount "95"]
[EventDate "2011.04.02"]
[EventType "team-tourn"]
[EventRounds "3"]
[EventCountry "USA"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]
[WhiteTeam "UMBC"]
[BlackTeam "UTD"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. e4 e6 2. d4 d5 3. Nd2 Be7 {A waiting move. The main idea behind it is that
Black waits to see how White will set up his minor pieces on the kingside.} 4.
Bd3 ({In the event of} 4. Ngf3 {Black replies} Nf6 5. e5 Nfd7 {[%cal Yc7c5,
Yb8c6,Gg7g5,Gg5g4] and White's centre is somewhat less vulnerable with the
knight on f3.}) 4... c5 5. dxc5 Nf6 6. Qe2 O-O 7. Ngf3 a5 {[%cal Yf6d7,Yd7c5,
Gb8a6,Ga6c5,Gb8d7] That's the point! Black is preventing White's b2-b4, and is
preparing to capture the c5-pawn with one of his knights.} 8. c3 $5 {Quite a
rare continuation. White keeps his options open, one of which could be
castling long.} ({The main line is} 8. O-O {after which Black equalised in a
recent game:} Na6 9. e5 Nd7 10. c3 Naxc5 11. Bc2 b6 12. Re1 f6 13. exf6 Bxf6
14. Nb3 Ba6 15. Qd1 Bb7 16. Nxc5 Nxc5 17. Be3 Ne4 18. Bxe4 dxe4 19. Qxd8 Rfxd8
20. Nd4 Bxd4 21. Bxd4 b5 22. Red1 Bd5 $11 {1/2-1/2 Kryvoruchko,Y (2604)
-Shulman,Y (2639)/Reykjavik ISL 2009/The Week in Chess 752 (25)}) 8... Nfd7 $5
{Apparently, my opponent wanted to avoid my preparation. Moreover, this move
has a point: Black does not want to allow White to play e4-e5 with tempo, and
the queenside knight can be developed to c6.} ({In a previous game Alejandro
preferred} 8... Na6 9. e5 Nd7 10. Nb3 Naxc5 11. Nxc5 Nxc5 12. Bc2 b6 13. Bf4 f5
14. exf6 Bxf6 15. Ne5 Bxe5 $6 (15... Ba6 $5 16. Qe3 $13) 16. Bxe5 Qg5 17. f4
Rxf4 18. Bxf4 Qxf4 19. Rf1 Qxh2 20. Qf3 Qh4+ 21. Rf2 Qe7 22. Qh5 Ne4 23. Bxe4
dxe4 24. O-O-O $14 {1-0 Panchanathan,M (2542)-Ramirez,A (2594)/Richardson USA
2011/The Week in Chess 854 (58)}) 9. O-O (9. exd5 {gives nothing:} Nxc5 10. Bb5
exd5 11. O-O Nc6 12. Nd4 Bd7 13. N2f3 Bf6 $11 {1/2-1/2 Almasi,Z (2644)
-Radjabov,T (2567)/Pamplona 2001/CBM 087 (33)}) 9... Nxc5 10. Bc2 b6 11. Rd1 {
It is not obvious where White's rook would be more useful. One of the typical
plans for White in this position is to close the centre with e4-e5 and develop
an attack on the kingside. Black, on the other hand, attacks White's centre
with f7-f6, and in this scenario the rook on e1 would be more active. The move
I played creates some pressure along the d-file, which should give me time to
relocate my forces to the kingside.} (11. Re1 $5 Ba6 12. Qe3 Nc6 13. e5 Qc7 (
13... f6 $6 14. exf6 Bxf6 15. Nb3 {winning a pawn.}) 14. Nb3 $13) 11... Ba6 12.
Qe3 Nc6 $146 (12... Ra7 13. exd5 {1/2-1/2 Yemelin,V (2520)-Vitiugov,N (2550)/
St Petersburg 2006/CBM 112 ext}) 13. Nf1 {Once again I had to make tough
choices. I felt that the knight could be transferred to the kingside fairly
easily, which would help to develop the attack.} ({Another alternative was to
send the knight to d4 via b3, which would probably be consistent with the idea
of closing the centre.} 13. Nb3 $5 {with a complicated position.}) 13... Ra7 $1
{[%cal Ya7d7] It seems that the idea implemented by Vitiugov works out even
better now, since Black will respond with 14...Rd7 after White's capture.} 14.
exd5 {The most principled reply. Other continuations seem to be not dangerous
for Black:} (14. e5 f6 15. exf6 Bxf6 16. Ng5 Bxg5 17. Qxg5 Qxg5 18. Bxg5 Ne5
$11) (14. Ng3 Rd7 15. e5 f6 16. exf6 Bxf6 17. Nh5 e5 $15) 14... Rd7 15. Ng5 {
This is probably the only way to keep fighting.} (15. b4 $2 {is refuted by:}
axb4 16. dxc6 Rxd1 17. Bxd1 Qxd1 18. Bb2 Qc2 $19) 15... h6 {Alejandro stays
cool.} ({I thought that after} 15... Bxg5 16. Qxg5 {White should be better
thanks to his pair of bishops, but Fritz disagrees with me:} Rxd5 17. Rxd5 exd5
18. Qg3 $14 {/=}) (15... g6 $2 16. Nxh7 (16. Nxf7 Rxf7 17. dxe6 Nxe6 18. Rxd7
Qxd7 19. Bb3 Ncd8) (16. Qh3 $5 h5 17. Nxf7 Rxf7 18. Bxg6) 16... Kxh7 17. Qh6+
Kg8 18. Bxg6 fxg6 19. Qxg6+ Kh8 20. Qh5+ Kg8 21. Bh6 $40 {[%cal Gh5g6,Yd5c6]})
16. Nh7 {In for a penny, in for a pound...} Re8 17. Qh3 $1 {[%csl Rg8][%cal
Gc1h6,Yc2h7] This was the key idea behind my 15th move.} ({Unfortunately,} 17.
Qg3 {does not work out:} Bh4 $8 18. Qg4 Ne5 $19) 17... Rxd5 18. Bxh6 (18. Rxd5
$2 {is bad, in view of} Qxd5 $1 (18... exd5 19. Bxh6 g6 (19... gxh6 20. Qxh6
Bd3 21. Bxd3 Nxd3 22. Ng3 Qd6 23. Qxd6 Bxd6 24. Nf6+ $16) 20. Bf4 $14 {[%cal
Yh3h6]}) 19. Bxh6 (19. Ne3 {is too slow:} Qd7 20. Ng4 Bd3 $19) 19... gxh6 20.
Ne3 Qe5 21. Ng4 Qf4 $1 {During the game, I did not see this resource in my
calculations...} (21... Qg7 22. Nxh6+ $18) 22. g3 (22. Qh5 Be2) 22... Qd2 23.
Nhf6+ Bxf6 24. Nxf6+ Kf8 25. Nxe8 Kxe8 $17) 18... Bd3 (18... gxh6 $5 {looks
very dangerous for Black, but Fritz somehow holds Black's position after} 19.
Ne3 (19. Qxh6 Bd3 20. Ne3 Bxc2 21. Rxd5 exd5 22. Nxc2 Ne4 $19) (19. Rxd5 Qxd5 {
- see the 18.Rxd5 variation.}) 19... Bg5 $1 (19... Bd3 20. Nxd5 Qxd5 (20...
Bxc2 21. Ndf6+ Bxf6 22. Rxd8 Bxd8 23. Qf3 $16) 21. Bxd3 Nxd3 22. Rxd3 Qe4 23.
Re3 Qxh7 24. Qg3+ $16 {[%cal Yg3c7]}) (19... Rd3 20. Qxh6 Ne5 21. f4 $16) 20.
f4 (20. Nxd5 $5 exd5 21. Re1 $13) 20... Bxf4 21. Nxd5 exd5 22. Qg4+ (22. Qf5
Be3+ 23. Kh1 Re5 24. Nf6+ Kg7 25. Nh5+ Kf8) (22. Qf3 Be5 23. Rxd5 Qh4 24. g3
Qe7 25. Rxe5 Nxe5 26. Nf6+ Kg7 27. Nxe8+ Qxe8 $15) 22... Bg5 23. Nxg5 (23. Rxd5
Qe7 {[%cal Ye7e3]}) 23... Qxg5 24. Qxg5+ hxg5 25. Rxd5 $11) 19. Bxd3 Rxd3 20.
Qg4 $14 ({Of course not} 20. Rxd3 $4 Qxd3) 20... g6 21. Rxd3 Qxd3 (21... Nxd3
22. Ng5 Qd7 (22... Nxb2 23. Nxf7) 23. Rd1 $14) 22. Ng5 $2 {At this point, both
players were short on time, so the quality of the game decreased significantly.
} ({Here is the tactical resource I missed:} 22. Qf4 $1 f5 (22... Nd7 23. Bg5
$14) (22... Ne4 23. Bg5 $14) (22... Qf5 23. Qc7 $1 $16 {[%cal Yf1e3]}) 23. Qc7
({But not} 23. Ng5 $2 e5) 23... Qd7 24. Qxd7 Nxd7 25. Ng5 $14) 22... Ne5 {
Even though White is a pawn up, Black's active pieces give him sufficient
compensation for equality.} 23. Qd4 Qxd4 $6 {This move is the root of Black's
blunder on the 25th move. Obviously, my opponent overlooked my 27th move.} (
23... f6 {looks much more attractive, since it drives away White's knight to
h3.} 24. Nh3 (24. Rd1 Qe2 25. Ng3 (25. b4 fxg5) 25... Qxb2 26. N5e4 Rd8) 24...
Rd8 (24... Qxh3 $5 25. gxh3 Nf3+ 26. Kg2 Nxd4 27. cxd4 Nd3 28. Be3 Nxb2 29. Rc1
$11) (24... g5 $2 25. Bxg5 Qg6 26. Qe3 $1) 25. Qxd3 Nexd3 {[%cal Yg6g5]} 26.
Bc1 (26. Rb1 g5 27. f4 g4) 26... Na4 27. Nf4 $11) (23... Qe2 24. Nh3 $11) 24.
cxd4 Ng4 25. dxc5 Bxc5 $4 {A blunder that loses the game.} ({Of course, Black
should have preferred} 25... Nxh6 26. Ne4 {and after a couple of not obvious
moves found by the engine, Black could have even equalised:} f5 $1 (26... bxc5
27. Nfd2 $14) 27. Nd6 Rd8 $1 (27... Bxd6 $2 28. cxd6 Rd8 29. Rd1 Nf7 30. d7 $16
) 28. Nb7 Rd7 29. c6 Rc7 30. Rc1 Nf7 31. f4 g5 $1 32. g3 gxf4 33. gxf4 Nd6 $11)
26. Ne4 $1 Nxh6 27. Nf6+ $18 {The rest needs no comment.} Kf8 28. Nxe8 Kxe8 29.
Ne3 f5 30. Rd1 Ke7 31. Kf1 f4 32. Nc4 Ng4 33. f3 Nf6 34. Ne5 g5 35. Nc6+ Kf7
36. Ne5+ Ke7 37. Nc6+ Kf7 38. Rd8 Nd5 39. Ke2 Bg1 40. h3 Bc5 41. Ne5+ Kg7 42.
Kd3 Be7 43. Rd7 Kf8 44. Rb7 Bd6 45. Nd7+ Ke8 46. Nxb6 Nb4+ 47. Ke4 Nxa2 48. Nc4
1-0

[Event "USA-ch"]
[Site "Saint Louis"]
[Date "2014.05.18"]
[Round "10"]
[White "Gareyev, Timur"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "D44"]
[WhiteElo "2653"]
[BlackElo "2633"]
[PlyCount "120"]
[EventDate "2014.05.08"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "USA"]
[EventCategory "15"]
[SourceTitle "CBM 161"]
[Source "ChessBase"]
[SourceDate "2014.07.16"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6 6. Bg5 Bb4 7. g3 h6 8. Bxf6
Qxf6 9. Bg2 Nd7 10. a5 O-O 11. Qa4 Qe7 12. O-O b5 13. axb6 Nxb6 14. Qxc6 Bb7
15. Qb5 Rfb8 16. Na2 Bd6 17. Qa5 Be4 18. Nc3 Bb4 19. Qe5 Bc6 20. Ra6 Nd7 21.
Qf4 Bb7 22. Ra2 a5 23. Rfa1 Nf6 24. Ne5 Bd6 25. Rxa5 Rxa5 26. Rxa5 Bxg2 27.
Kxg2 Qb7+ 28. Qf3 Qc7 29. Rb5 Bxe5 30. Rxe5 Qd7 31. e3 Rxb2 32. Rc5 Rb4 33. g4
Qd8 34. h3 Nd7 35. Rc6 Nb8 36. Rc5 Nd7 37. Rc6 Nb8 38. Rc5 Nd7 39. Rb5 Rb3 40.
Rxb3 cxb3 41. Qc6 Qa5 42. Na4 Nf6 43. Qc8+ Kh7 44. Qc4 Qa8+ 45. Kg1 Qf3 46.
Qxb3 Qxh3 47. Qb1+ g6 48. Qb7 Qxg4+ 49. Kf1 Kg7 50. Nc5 h5 51. Qc7 h4 52. Qe5
h3 53. Ke1 Qg1+ 54. Ke2 h2 55. Nxe6+ fxe6 56. Qc7+ Kh6 57. Qf4+ Qg5 58. Qxh2+
Qh5+ 59. Qxh5+ gxh5 60. Kf3 Kg5 0-1

[Event "USA-ch"]
[Site "Saint Louis"]
[Date "2014.05.19"]
[Round "11"]
[White "Erenburg, Sergey"]
[Black "Ramirez Alvarez, Alejandro"]
[Result "1-0"]
[ECO "B85"]
[WhiteElo "2633"]
[BlackElo "2595"]
[PlyCount "103"]
[EventDate "2014.05.08"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "USA"]
[EventCategory "15"]
[SourceTitle "CBM 161"]
[Source "ChessBase"]
[SourceDate "2014.07.16"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2 Nf6 8.
O-O Be7 9. f4 d6 10. Qe1 O-O 11. Qg3 d5 12. e5 Nxd4 13. Bxd4 Bc5 14. Qe3 Nd7
15. Bd3 Bxd4 16. Qxd4 Qc5 17. Ne2 Qxd4+ 18. Nxd4 Nc5 19. Kf2 Bd7 20. Ke3 Rac8
21. h4 f6 22. g4 Kf7 23. h5 h6 24. g5 f5 25. Rh1 Rh8 26. Rag1 Rcg8 27. b4 Na4
28. c4 Nb6 29. c5 Nc4+ 30. Bxc4 dxc4 31. Kd2 Bc6 32. Nxc6 bxc6 33. g6+ Ke7 34.
Kc3 Rd8 35. Rd1 Rd5 36. Kxc4 Kd7 37. Rd3 Kc7 38. Rb1 Rhd8 39. Rbb3 a5 40. Rxd5
cxd5+ 41. Kd4 axb4 42. Rxb4 Ra8 43. Rb6 Ra4+ 44. Kc3 Rxf4 45. Rxe6 Re4 46. Re7+
Kc6 47. Rxg7 Rxe5 48. Rg8 Re7 49. Kd4 Re4+ 50. Kd3 Re7 51. Rc8+ Kb5 52. Kd4 1-0

[Event "American Continental 13th"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Erenburg, Sergey"]
[Black "Cordova, Emilio"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2550"]
[BlackElo "2651"]
[PlyCount "57"]
[EventDate "2017.06.10"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. d4 c6 5. Be2 Bg4 6. h3 Bh5 7. O-O e6 8. c4
Qd8 9. Nc3 Nbd7 10. Bf4 Nb6 11. g4 Bg6 12. Ne5 Nfd7 13. Nxg6 hxg6 14. c5 Nc8
15. Kg2 Be7 16. Qb3 b6 17. Bf3 bxc5 18. Bxc6 Ncb6 19. dxc5 Bxc5 20. Rad1 Rc8
21. Qb5 Rxc6 22. Qxc6 Qc8 23. Qxc8+ Nxc8 24. Ne4 Be7 25. Rc1 Ncb6 26. Rc7 e5
27. Be3 f5 28. Nc3 e4 29. Rd1 1-0

