Sunday, April 24, 2011

Round 1: Tan Jun Feng - NM Lim Zhou Ren

Tan Jun Feng - NM Lim Zhou Ren
SEA Games Selection,  Round 1, 22.4.2011

Analysed by Centaur (Hairulov+Fritz)

1. e4 d6 It's interesting to note that both IM Jimmy Liew and NM Lim Zhou Ren  reply 1.e4 with 1...d6 in their first round game.  Jimmy usually played The French but this time  he beat Sumant with 1...d6. A special preparation for this selection? - Opponents take note :)


2. d4 Nf6 3. Nc3 c6  4. Be3 It seems to early for white to play The English Attack Set-up or The Yugoslav Setup - ala Sicilian Dragon ( Be3-f3-Qd2) before black show his real intention. Maybe white can try a waiting move 4.f3 and if 4...Qb6 he can then play 5. Bc4  followed by 6.Bb3 and 7.Be3 without worrying about the b2 pawn.


4...Qb6 



5.Rb1 Now white has ruled out the possibility of castling queen side.


5...Ng4 6. Bg5 e5 7. Nf3 h6 8. Bh4 Nd7 9. h3 Ngf6 10. Bg3 Qc7 11. Bd3 b5 12. O-O b4  Maybe black should complete his development first.

13. Ne2 13. Na4 As suggest by Zhou Ren after the game looks like  a worthy option.


13... c5 14. dxe5 dxe5

NM Lim Zhou Ren (right) is waiting Jun Feng to play 15.Bb5 


15. Bb5 Bd6 15... Nxe4 ? 16. Nxe5 Nxg3 17. Nxg3 Qxe5 18. Re1


16. Qd3 a6 17. Bxd7+ Bxd7 18. Rfd1 Ke7 




19. Qxd6+?! White seems not to gain a  worthy compensation from this exchange sacrifice.  19. Qe3! Threatening Rxd6 later is  better. White will have a strong initiative then. For instance after  19...Be6 20. Rxd6! Qxd6 21. Bxe5 Qb6 22.Nf4 with strong initiative.


19... Qxd6 20. Rxd6 Kxd6 21. Bxe5+ 21. Nxe5  Is more accurate. The threat is stronger then the execution.


21... Ke7 22. Nf4 Be6 Instead of 22... Nxe4? 23. Re1 with strong threat.

23. Bxf6+?! White is material down but he  should keep his  pieces to maintain pressure against black's king. After the trade,  black's king can breath easier.


23...Kxf6 


24. Nd3 Rhc8 25. a3 a5 26. Kh2 Ke7 27. Kg3 c4 28. Nde5 ? f6 28... c3! and Black can look forward to a comfortable game for e.g. after :-

a) 29. b3 bxa3  with a winning advantage.

b) 29. axb4 Ba2 30. Rd1 cxb2 the b-pawn queening

c)  29. bxc3 bxa3 and black's a -pawn is a serious threat.

 29. Ng6+ Kf7 30. Nf4 g5 31. Ne2 ?! White should trade black's strong bishop who is controlling important squares and diagonal. 31. Nxe6 Kxe6 and black's king can attack black's king side pawn with Kg4-Kh5 later.


31... Rab8  31... c3! 32. bxc3 bxa3 33. Ra1  a2 With winning advantage.


32. Ra1 bxa3 33. Rxa3 Rc5 34. Nfd4 ?  White should protect his b2 pawn with 34.Ra2  .


34... Rxb2  35. Nc3 Rb4 36. f4 Bd7 37. Kf3 Rb6 38. Ke3 Rd6 39. f5 Rb6 40. g4

40. Nf3  followed by Kd4 later is a good option.


40... Rb8 41. Kf3 again 41. Nf3


41... Rh8 Maybe black should stick with his queenside expansion with 41... a4 followed by Ra5 later and his rook on b-file can penetrate into white's defense.


42. Nd5  Black held the material advantage and white pieces doesn't look threatening here but after


42...c3?

A  bad move because now black lost all his advantage.  White can now move his rook along the  b-file to penetrate into  black's defense.


43. Nb3? White missed to turn the table with 43. Rb3! because believe it or not, white will have  the upper hand by  threatening to dominate the 7th rank with 44. Rb7 pinning black's bishop. Black's vulnerable king  position add more problems. Possible continuation :-

 a) 43...Bc6 44. Nxc6 Rxc6 45. Rb7+ Kf8 46. e5 fxe5 47. f6 ! with clear advantage.

b) 43... Rc4 44. Ke3 Bc8 45. Rb6!  and the f6 pawn will drop so does black's defense.

c) 43... Bc8 44. Rb6  Attacking the f6.


43... Rb5  44. Nxc3 Rbb8 45. Nc5?  This move force white to exchange his rook later. 45. Rxa5 is the correct move for e.g. 45...Ra8 46. Rd5. The different with 45.Nc5?!  is now white can keep his rook.


45... Bc6 46. Rxa5 Ra8 Now white can't avoid trading rook because his own knight on c5 prevent his rook to go to d5 or c5.


47. Rxa8 Rxa8 48. Ke3 Ra1 Black's rook is going to attack white's pawn and king from behind. White pawns is vulnerable.

49. Nd3 Rh1 50. Nf2 Rc1 51. Kd2 Ra1 52. Nd3 Ke7 53. Ke3 Rh1 54. Nf2 Rc1 55. Kd2 Ra1 56. Nd5+ White is in time trouble and here he try to create initiative rather then defense passively.


56...Bxd5  57. exd5 Kd6

Jun Feng (left) before playing 58.Ne4 against NM Lim Zhou Ren
58.Ne4?!  I was expecting white to play the obvious move 58. c4  and if 58...Kc5 then 59. d6 !? Kxd6 60. Ke3 Kc5 61. Ne4+ Kxc4 62. Nxf6  With some counter attacking chances although black still maintain the advantage..


58... Ke5  59. Kd3 59. Ke3 Re1+


59... Rd1+ 60. Nd2 Kxd5  Now it's quite over. The rest is rather trivial


61. c4+ Ke5 62. Ke3 Re1+ 0-1 White lost on time but his game is beyond safe  for e.g.  63. Kd3 Rh1
and white pawns  will drop one by one.

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