Partidas en base

Amador - Cruz Lima

Campeonato de Cuba XXXV Las Tunas 1996

Siciliana B56

a8 b8 c8 d8 e8 f8 g8 h8
a7 b7 c7 d7 e7 f7 g7 h7
a6 b6 c6 d6 e6 f6 g6 h6
a5 b5 c5 d5 e5 f5 g5 h5
a4 b4 c4 d4 e4 f4 g4 h4
a3 b3 c3 d3 e3 f3 g3 h3
a2 b2 c2 d2 e2 f2 g2 h2
a1 b1 c1 d1 e1 f1 g1 h1
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 e5
 
This move cannot be found at the Chess Informant Encyclopedia. Under section B54 only 4...e6; 4...c6 and of course 4...f6 are considered. After 4...f6 5.c3 e5 is a well known variation, however I could find nearly 30 games with 4...e5 directly in my database.
 
5. Bb5
 
Instead all  moves except 5.f5 have been played without success. The bishop check is typical and best, intending to take immediate control of the white squares.
 
5... Nd7
 
[5... Bd7 looks passive but has been played by both Chiburdanidze and Alexandria.]
 
6. Nf5 a6 7. Ba4!?
 
A modern treatment [7. Bd7 Qd7 8. Nc3 Nf6 transposes to a well known variation where many games are available, in particular after 9. Bg5 Ne4 10. Ng7 Bg7 11. Ne4 O-O! where Black has resources based on his strong bishops.]
 
7... b5 8. Bb3 Nb6
 
[8... Nc5!? 9. Bd5 Bf5 10. ef5 Rc8 11. g4?! e4 12. b4 Qf6 13. bc5 Qa1 14. Be3 dc5 15. Bb7 Rc7 16. Ba6 Bd6 17. Qd6 Qb1 18. Kd2 Qb4 19. Ke2 Rd7 20. Qb8 Ke7 21. Qe5 Kd8 22. Qb8 Ke7 23. Qe5 Kd8 24. Qb8 1/2-1/2 De Firmian-Bator/Stockholm 1996] [8... Ndf6 9. O-O Bf5 10. ef5 Ne7 11. f4 Nc6 12. Be3 Be7 13. Nc3 O-O 14. Nd5 Rc8 15. c3 Nd5 16. Qd5 Qc7 17. a4 Rb8 18. fe5 de5 19. ab5 ab5 20. f6 Bf6 21. Rf6 gf6 22. Qf3 White has the attack Stefansson-Johnsen/Gausdal 1990 1-0 (37)] [8... Ngf6? 9. Nd6 (9. Nc3 transposes again to the order 4...f6 5.c3 e5. Here apart from 9...b6 Black has 9...c5 inmediately, a critical line since the square d5 is covered and so 10.d5 is not adviced) 9... Bd6 10. Qd6 White has a decisive advantage]
 
9. Nc3 Nf6
 
[9... Be6!? 10. O-O g6 11. Ng3 Bg7 12. f4 ef4 13. Bf4 Nc4 14. Nd5 Nb2 15. Qf3 Nc4 16. Bc4 Ba1 17. Ra1 bc4 18. Rd1 Bd5 19. Rd5 Ne7 20. Rd6 Qa5 21. h3 O-O 22. Rf6 Qa2 23. Be5 Rac8 24. Qe3 Nc6 25. Bc3 Qc2 26. Nf5 Rfd8 27. Qh6 1-0 Hernandez,Gilb-Diaz,JC/Mexico City open (07) 1991]
 
10. Bg5 Bf5 11. ef5 Be7
 
Here I thought for some twenty minutes, 12.xf6 had been played successfully in a game I had seen. I decided to play another move order which in fact seems more convenient.
 
12. O-O!
 
[12. Bf6 Bf6 13. a4 O-O 14. O-O e4 (14... ba4!? 15. Na4 e4! 16. Re1 Na4 17. Ra4 Bb2 18. Bd5 Ra7 White is better but Black is solid, over the board I was not sure I could manage to launch a decisive attack on the king side.) 15. ab5 Bc3 16. bc3 ab5 17. Ra8 Na8 18. Qd5 Qc7 19. Qe4 Qc3 20. Bf7!! Rf7 21. Qa8 White has a moderate advantage Riemersma-Hoeksema/Dieren open (03) 1989 1-0 (33)]
 
12... O-O
 
[12... Qc7?! 13. a4 b4 14. Bf6 Bf6 15. Ne4 Rd8 16. a5 Nc8 17. Qg4 Kf8 18. Nf6 gf6 19. Qb4 White has a decisive advantage Hunt-Strutinskaya/Moscow (ol)1994 1-0 (33)] [12... b4!? 13. Bf6 bc3 14. Be7 Qe7 15. bc3 O-O intending to build up a fortress with d7-c5 but there is no doubt that White is better anyway.]
 
13. a4!
 
[13. Bf6 Bf6 14. a4 could still transpose to the Riemersma game where 14... ba4!? 15. Na4 e4! White has a slight advantage is probably the best try to hold the game within a tolerable inferiority.]
 
13... b4?!
 
[13... Qd7 $142 14. Bf6 Bf6 15. ab5 ab5 16. Qf3 White has a slight advantage] [13... ba4 14. Na4 Nfd7 15. Nb6 (15. Be3!?) 15... Nb6 16. Be3 White has a moderate advantage]
 
14. Bf6 gf6??
 
Hard to understand, a serious positional concession, tactically weak too since White may grab a pawn at once if he wishes with g4+ [14... bc3 $142 15. Be7 Qe7 16. bc3 White has a moderate advantage] [14... Bf6 15. Ne4 d5 (15... Be7 16. a5 d5 17. ab6 de4 18. b7 White has a moderate advantage) 16. Nf6 Qf6 (16... gf6 17. a5 Nc4 18. Bc4 dc4 19. Qg4 Kh8 20. Qc4 White has a moderate advantage) 17. a5 Nc4 18. Qd5 White has a moderate advantage]
 
15. Nd5!?
 
Deciding to play for the attack not allowing the push d5-d4 that would occur should White accept the pawn. [15. Qg4 Kh8 16. Qb4 d5 17. Qh4 d4 18. Ne4 White has a moderate advantage was of course playable and strong.]
 
15... Nd5 16. Bd5 Rb8 17. Re1! Kh8
 
The only move, otherwise Black would get mated soon.
 
18. Re4
 
White has the attack
 
18... Rg8
 
singular move again forced
 
19. Bf7
 
White has a moderate advantage
 
19... Rg5 20. Qd3 a5
 
[20... Rf5? 21. Rh4 White has a decisive advantage]
 
21. Rh4
 
[21. Be6!  ae1, c4, ee4 +-]
 
21... Rg7 22. Bd5
 
[22. Be6]
 
22... Rc8 23. Re1 Rc5 24. Ree4
 
Here I thought the game would end up quickly
 
24... Bf8!
 
singular move [24... Qc8 25. Reg4 Rc2 (25... Bf8 26. Rh7) 26. Rh7! Rh7 27. Qc2! White has a decisive advantage]
 
25. Rc4! Rc4
 
[25... Rgc7 26. Rcg4 Bg7 (26... Rg7 27. Rh7) 27. Qh3 h6 28. Rh6 Bh6 29. Qh6 Rh7 30. Qf6! Qf6 31. Rg8#]
 
26. Rc4 Rc7 27. Rc7
 
[27. Be6!?]
 
27... Qc7 28. Kf1
 
[28. Bc4]
 
28... Qc5 29. Bb3 Qc6
 
[29... Bh6 30. Qb5]
 
30. Qb5!
 
White has a decisive advantage
 
30... Qb5 31. ab5 d5 32. b6! Bd6 33. Ke2 Kg7 34. Kd3 Kf8
 
[34... d4 35. Ke4 (35. Kc4) 35... Kf8 36. Kd5 Ke7 37. f3 Bb8 38. Kc6 Kd8 39. Kb7 Bd6 40. Ka8]
 
35. Bd5 a4 36. Kc4
 
[36. Kc4 a3 37. ba3 ba3 38. Kb5 Ke7 39. Bb3 c4]
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