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Rinat Jumabayev vs Yangyi Yu
Aeroflot Open (2011), Moscow RUS, rd 3, Feb-10
Catalan Opening: Open Defense (E04)  ·  1-0



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Kibitzer's Corner
Feb-14-11  GilesFarnaby: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 c6 6. a4 b5 7. Ne5 Nd5...

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...La ligne principal, vd. par ex. Sargissian - Werle 2007; axb5 et Nc3 aussi ont eté dejà essayé avec des bonnes résultats.

8. O-O (8. axb5 cxb5...

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...Et la diagonal est découverte, toujours avec la menace Nc3) 8... Bb7 9. e4...

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...(Cette coup est l'approche le plus positionnel, cachant la diagonal de notre B mais retenant le domaine du centre, Nc3 c'est aussi possible, en attendant le moment d'attaquer c6.) Nf6 10. Nc3 a6 11. d5 Bd6...

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...(La noveauté, auparavant 11...cxd5 a eté joué, comme dans Mikhalevski,V (2632)-Naiditsch,A (2637)/Heviz 2008/CBM 123)

(11... cxd5 12. exd5 exd5 13. axb5 axb5 14. Rxa8 Bxa8 15. Nxb5 Bc5 16. Qa4 O-O 17. Qxa8 Qe8 18. Nc3 Qxe5 19. Bf4 Qh5 20. Bxb8 Ng4 21.h4 Nxf2 22. Qb7 Ng4+ 23. Kh1 Nf2+ 24. Kh2 Ng4+ 25. Kh1 Nf2+ 26. Rxf2 Bxf2 27.Bd6 Re8 28. Qxd5 Re1+ 29. Kh2 Qxd5 30. Bxd5 Bd4 31. Bf4 Rf1 32. Kh3 Rf2 33. Nd1 Rf1 34. Nc3 Rf2 35. Ne4 Rxb2 36. Bxc4 Rb7 37. Nd6 Rd7 38. h5 Bc5 39. Ne4 Rd4 40. Bxf7+ 1/2-1/2 Mikhalevski,V (2632)-Naiditsch,A (2637)/Heviz 2008/CBM 123)

...12.dxc6 (Peut être était meilleur Ng4, pour démonstrer le mauvais placement du Bd6, par ex.: 12. Ng4...

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...Be7 13. dxe6 Qxd1 14. Nxf6+...

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...Bxf6 15. exf7+ Kxf7 16.Rxd1 (Toutefois il y a trop de simplification pour poursuivre sérieusement la partie.)

...12... Nxc6 13. Nxc6 Réduire la tension du centre était nécessaire: des autres coups comme 13.Ng4 ne donnent pas rien d'avantage. (13. Ng4 Nxg4 14. Qxg4 h5 15. Qxg7 Be5 et l'initiative serait dans les pièces noirs.) 13... Bxc6 14. axb5 axb5 15. Rxa8 Bxa8 16. Nxb5 Bc5 17. Qa4...

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...(Montrant de l'ambition de combattre pour le point entier. Malgré tout la position est complètement égale.) O-O 18. Qxc4 Qb6 19. Nc3...

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...(Une approche plus directe, peut être l'unique manière de lutter pour l'avantage, aurait été: 19. b4 Be7 20. Be3...

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Feb-14-11  GilesFarnaby: ...Qb8 21. Ba7 Rc8 22. Bxb8 Rxc4)

19... Bd4 20. Qe2 Qc6 21. Bd2 Bxc3 22. Bxc3 Nxe4 23. Qg4 f6...

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...(Desormais il y a un objectif pour attaquer (e6) ou une diagonal (a2-g8) pour le B.

(Meilleur, probablement, était le suivant: 23... g6 24. Qh4 Qa4...

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...25. Bf6 Qc2 26. Bxe4 Qxe4 27. Qxe4 Bxe4 (Mais également insuffisant pour combattre pour le point entier.)

24. Ra1 Kh8 25.Rxa8 Rxa8 26. Bxe4...

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...Ra1+ 27. Kg2 Qc4 28. Kh3 Qf1+ 29. Bg2 Qb5 30. Qf3

(Probablement était meilleur cette plan, à supposer que le K est sauf dans h3: 30. f4 Ra6 31. Qd1...

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....Rd6 32. Qf3 Kg8 33. Bf1 Qf5+ 34. Kg2 Qc2+ 35. Qe2 Qxe2+ 36. Bxe2 (Et le progrès des blanches pièces est lent mais inévitable.)

30... h531. Qe4 Ra6 32. Qg6 Ra4 33. b4 Qf5+ 34. Qxf5 exf5 35. Bc6 (Meilleur: 35. b5) 35...Ra3 36. Bd4 Rd3 37. Be3 g5 38. Kg2 f4 39. gxf4 gxf4 40. Bc5 Rc3 41. h4 Kg7 42.Be8 Kh6 43. Bf8+ 1-0

Jun-10-22  Saniyat24: What can Yu do against two Jumbo bishops?

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