Partidas en base

Christian Jepson - Amador

Mondariz Open Mondariz 1994

Siciliana Najdorf B93

[Event "Mondariz Balneario open"]
[Site "Mondariz"]
[Date "1994.??.??"]
[Round "4"]
[White "Jepson, Christian"]
[Black "Rodriguez, Amador"]
[Result "0-1"]
[ECO "B93"]
[WhiteElo "2325"]
[BlackElo "2515"]
[Annotator "Rodriguez,Am"]
[PlyCount "86"]
[EventDate "1994.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "CBM 42"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. a4 Be7 9. Bd3 O-O 10. O-O exf4 11. Bxf4 {In most games the safer 11.h1 is preferred when Black may replay 11...c5, 11...e5 or even 11...h5!?. The text is very aggressive forcing Black to defend accurately.} Qb6+ 12. Kh1 Qxb2 13. Nd5 $146 {A new try by the swedish master Jepson.} (13. Qd2 Qb6 14. Nd5 Nxd5 15. exd5 Nc5 16. Ng5 Bxg5 17. Bxg5 f6 18. Be3 Qc7 {Did not cause any particular problems to Black in Vogt-Gelfand, Halle 1987.}) (13. Qe1 {The main line.} Qb6 $1 {The latest try.} (13... Qb4 {The older method of defence, at presente in doubt due to the following game:} 14. Rb1 Qc5 15. Nd5 Nxd5 16. exd5 Bf6 17. c4 Qc7 18. Qg3 Ne5 19. Bg5 $1 Bxg5 20. Bxh7+ $1 Kxh7 21. Nxg5+ Kh6 22. Qh4+ Kg6 23. Rb3 $1 {With a winning attack, Vogt-Womacka, DDR 1989}) 14. Nd5 (14. Rb1 $2 Qd8 15. e5 dxe5 16. Nxe5 Nc5 $1 17. Bc4 Be6 $17 {Zarnicki-Dvoirys, Biel (izt) 1993}) 14... Nxd5 15. exd5 Qd8 {The first critical position for the assesment of the whole variation. Our game will transpose into it in a few more moves.}) 13... Nxd5 14. exd5 Qb6 {This game was played two rounds after Jepson-Nedobora where White had a very miserable position after 14...b4 15.e1?. Over the board I did not like the possibility of an improvement from my opponent who had played fast thus far.} (14... Qb4 $5 {This logical move was played in the very first game with 13.d5} 15. Qe1 $2 {A very weak move that allows Black to reach immediately a favourable position.} (15. Bg5 $5 {Much more dangerous.} Bxg5 $2 (15... Bf6 $1 $13) 16. Bxh7+ $1 Kxh7 17. Nxg5+ Kg6 18. Qd3+ f5 19. Ne6 $40 {White's attack seems devastating to me.}) 15... Qxf4 16. Qxe7 Nf6 17. Rae1 Bg4 $17 {Jepson-Nedobora/Mondariz op (2)/1994/}) 15. Qe1 {By this we now transpose into the main line of the 11.xf4 variation. White could also play 15.e2 to take advantage of the move order, but in general, the queen enjoys better perspectives on g3.} Qd8 {We are now following Nijboer-Wojtkiewicz/Antwerpen/1993/ a very important game for this variation.} 16. c4 (16. Qg3 {Mentioned in informant 59 by Wojtkiewicz who now gives 16...f6. For some reason Van Wely, playing against De Firmian did not like the move and choosed instead:} Nc5 17. Rae1 Nxd3 18. cxd3 Bf5 19. Re3 Re8 20. Rfe1 Qd7 21. a5 Bf8 22. Rxe8 Rxe8 23. Rxe8 Qxe8 24. Bxd6 Bxd6 25. Qxd6 f6 26. Qc7 Qb5 27. d6 Qb1+ 28. Ng1 Qxd3 $17 {De Firmian-Van Wely, Akureyri 1994}) 16... Nc5 17. Bc2 Bg4 18. Qg3 Bxf3 19. Rxf3 Bh4 (19... f5 $6 20. Raf1 g6 21. Bh6 Bh4 22. Qh3 Rf7 23. Bxf5 $1 {With a dangerous attack, Reinderman-Dvoiris, Leeuwarden 1993}) 20. Qh3 (20. Qg4 $5 { af1 comes into serious consideration.}) 20... g6 21. Bh6 $146 (21. Raf1 $6 Bg5 $1 22. Bg3 f5 23. Bf2 Nd7 24. Bd4 Bf6 $17 {Nijboer-Wojtkiewicz, Antwerpen 1993, 59/298}) 21... Bf6 22. Raf1 Bg7 {Given as  in 59/298 by Wojtkiewicz but at first sight one can see that things are not so easy. White has five well positioned pieces pointing at Black's king, while the black knight, beautifuly placed on c5 is too far to} 23. g4 $1 $40 {For the moment the immediate double rook sacrifice on f7 was losing, on some lines the pawn on g4 makes a difference.Besides White is simply threatening g5 xg7,h6+ and h3 with an eventual sacrifice on g6 in the air. There is} (23. Bxg7 Kxg7 24. Rxf7+ $2 Rxf7 25. Rxf7+ Kxf7 26. Qxh7+ Kf6 27. Qxg6+ Ke5 28. Qg3+ Kd4 $19) 23... f6 $6 {A move I rejected immediately for positional reasons, if White could play f4, g3, h4-h5 his position would be wonderful. Later I was too impressed by his attacking chances after g4-g5 and decided to stop his