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Simon Kim Williams vs John Anderson
Hastings (2015/16), Hastings ENG, rd 6, Jan-02
Gruenfeld Defense: Three Knights Variation (D90)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
Jan-03-16  Bruce Graham: Simon mates a King obstructed by its own pieces on e6. Nice finish.
Jan-03-16
Premium Chessgames Member
  akiba82: Williams is getting ready for his stretch run, and a high placing at Hastings.
Jan-04-16
Premium Chessgames Member
  OhioChessFan: Gotta love the playground nature of the opening. The kind of thing you expect from the Ginger GM.
Jan-06-16
Premium Chessgames Member
  PawnSac: I used to play the Russian var (5.Qb3) many years ago, but this new 5.h4 line is interesting! It gives white interesting prospects and being relatively new and unexplored its the kind of line we'd expect to see Simon play.
Jan-06-16  Nerwal: It's curious 1. ♘f3 ♘f6 2. c4 g6 3. ♘c3 d5 4. cxd5 ♘xd5 5. h4 has been known for a very long time, but this 5. h4 in the 4. ♘f3 Grünfeld only started to be tried some three years ago.
Jan-09-16
Premium Chessgames Member
  PawnSac: well, the CG database contains 60 5.h4 games 2008-2015, so it has been tried for 7 years now. But I agree, it is surprising to see it only very recently. If i had to venture a guess when it first appeared (without knowing) i probably would have thought in the early 90's after GK and AK increased the Grunfeld's popularity. I guess that just goes to show how so many GMs play the fashionable openings by rote, since they are staying on top of the recent theory and developments.
Jan-09-16
Premium Chessgames Member
  PawnSac: Here are the games:

http://www.chessgames.com/perl/ches...

Jan-09-16
Premium Chessgames Member
  JointheArmy: I love this 5. h4!? line.

The Ginger GM plays entertaining stuff.

Jan-14-16
Premium Chessgames Member
  PawnSac: < 1.c4 g6 2.d4 Nf6 3.Nc3 d5 4.Nf3 Bg7 5.h4 c6 >

5...c6 does not offer black many active prospects.
The CG database also gives a very poor impression of this move. 5...dxc4 leads to an equal game.

< 6. Bg5 >

Stockfish gives 5.cxd5 as best at 27 thru 32 ply,
but Bg5 is a sensible move. If ..dxc4 then 7.e3
and white has steered for a conventional QG
orthodox type pattern with early h4. There are
also interesting possibilities with Bxf6 and h5.
White attacks d5 encouraging ..dxc4 yielding e4 to white.

< 6...Nbd7 >

Here black played 6...h6 in
Hikaru Nakamura vs Peter Svidler
FIDE Grand Prix Khanty-Mansiysk (2015) ˇ Gruenfeld Defense: Three Knights Variation (D90) ˇ 1/2-1/2

After 6...Nbd7 white's plus jumps slightly. Black is trying for a solid QGD position, but if not
careful he will run into some wrinkles.

< 7. cxd5 Nxd5 >

7...cd5 8.Qb3 Nb6 9.e3 O-O 10.Bd3 Be6 = see..

Alexander Ipatov vs Ernesto Inarkiev
European Individual Championships (2014) ˇ
Gruenfeld Defense: Three Knights Variation (D90) ˇ 1/2-1/2

< 8. h5 >

or 8.e4

< ...Nxc3 9. bxc3 Qa5 >

9...Qa5 gives white a 1/2 pawn boost. ( 9. ..h6 = )

< 10. Bd2 Qd5?! 11.Rh4 >

Interesting but probably not as good as 11.Qc2.
Be that as it may, Simon certainly has his opponent
out of "book".

< 11. ..e5 >

..f5 ( -0.48 ) to restrain e4

< 12.e4 > white's plus starts to climb again.

< 12. ..Qd6 13.Qb3 a5?! >

..a5 is a bit slow. Stockfish prefers ..Nb6 here to activate the Bc8

< 14.a4 Bf6?! 15.Rh1 >

The immediate 15.hxg! (+1.23) is stronger, but it looks like Simon understandibly wants black to castle into his attack, afterwich at the very least white should retain a lasting initiative on the K side. Since black has been faultering already, I too would probably be thinking "Give him enough rope and he will hang himself."
This is one of those situations where humans and computers think differently. Objectively though, Rh1 does constitute a loss of a tempo.

..Qe7

< 16. Bc4 > (+0.24)

Better is the immediate 16.hxg (+0.64). Bc4 allows 16. ..g5 and white's h pawn can no longer open the file.

< 16. ..O-O? >

If i identified any move as "the losing moment" it would be now. Black plays into white's hands (castles into white's attack), and white's stockfish eval immediately jumps by more than a pawn.

< 17.hxg6 hxg6 18.Rh6 >

Stockfish considered two candidates in this position; Rh6 and Kf1. Strangely enough it selects Kf1.
36/69 7:31:21 13,184,835k 487k +1.21
Ke1-f1 b7-b6 Rh1-h6 Kg8-g7 g2-g4 e5xd4 c3xd4 Nd7-c5 Qb3-e3 Qe7xe4 g4-g5 Bf6-e7 Kf1-g2 Qe4xe3 Bd2xe3 Nc5-e6 d4-d5 c6xd5 Bc4xd5 Ra8-a7 Ra1-h1 Rf8-g8 Be3xb6 Ra7-d7 Bd5xe6 f7xe6 Nf3-e5 Rd7-d5 f2-f4 Rd5xe5 Bb6-d4 Bc8-b7+ Kg2-g3 Bb7xh1 Bd4xe5+ Kg7-f7 Rh6xh1 Be7-b4 Rh1-h7+ Kf7-e8 Kg3-g4 Bb4-c5 Rh7-b7 Bc5-b4 Be5-d4 Bb4-d2

Jan-14-16
Premium Chessgames Member
  PawnSac: < 18. ...Kg7 19.O-O-O b5 20.axb5 cxb5 >

AFter 25 minutes of analysis Stockfish 6-64 gives the following resourceful defense for black: 20.axb5 < exd4 > 21.cxd4 cxb5 22.Bd5 Nb6 23.Bxa8 Be6 24.Bd5 Rc8+ 25.Kb1 Nxd5 26.exd5 Bf5+ 27.Kb2 Rc2+ 28.Ka1 Rxd2 29.Rxd2 Kxh6 30.Qe3+ Kg7 31.Qxe7 Bxe7 32.Re2 Bb4 33.Ne5 Bc3+ 34.Ka2 Bxd4 35.Kb3 g5 36.Nc6 Bb6 37.f3 Kf6 38.Ra2 g4 39.Nxa5 gxf3 40.gxf3 Ke5 41.Nc6+ Kxd5 42.Ne7+ Ke5 43.Nxf5 Kxf5 44.Kb4 Be3 45.Ra6 Ke5 46.Kxb5

When the above analysis was pushed to move 25.Kb1 then begun there, the revised line was as follows:
( 1. c4 g6 2. d4 Nf6 3. Nc3 d5 4. Nf3 Bg7 5. h4 c6 6. Bg5 Nbd7 7. cxd5 Nxd5 8. h5 Nxc3 9. bxc3 Qa5 10. Bd2 Qd5 11. Rh4 e5 12. e4 Qd6 13. Qb3 a5 14. a4 Bf6 15. Rh1 Qe7 16. Bc4 O-O 17. hxg6 hxg6 18. Rh6 Kg7 19. O-O-O b5 20. axb5 exd4 21. cxd4 cxb5 22. Bd5 Nb6 23. Bxa8 Be6 24. Bd5 Rc8+ 25. Kb1 < Bxd5 > 26. exd5 Qe4+ 27. Ka1 Rc4 28. Rc1 Ra4+ 29. Kb2 Qe2 30. Kb1 Bxd4 31. Nxd4 Qxd2 32. Rh4 Rxd4 33. Rxd4 Qxd4 34. Qxb5 Nxd5 35. Qb2 Qxb2+ 36. Kxb2 Nf4 37. Rc4 Nxg2 38. Rg4 Ne1 39. Rg3 a4 40. Kc1 a3 41. Rxa3 Ng2 42. Kd2 Nf4 43. Ke3 Ne6 44. Ke4 Kf6 45. Ra7 Nc5+ 46. Kd4 Ne6+ 47. Ke3 Nc5 48. Ra5 Ne6 49. f3 Nc7 50. Ke4 Ne6 51. Ra6 Ke7 52. Rb6 Ng5+ 53. Ke3 Ne6 54. Rb7+ Kf6

this position looks drawn

< 21.Bd5 Rb8 22.Rdh1 b4 >

Stockfish gives the following line instead of 22. ..b4 :

1.c4 g6 2.d4 Nf6 3.Nc3 d5 4.Nf3 Bg7 5.h4 c6 6.Bg5 Nbd7 7.cxd5 Nxd5 8.h5 Nxc3 9.bxc3 Qa5 10.Bd2 Qd5 11.Rh4 e5 12.e4 Qd6 13.Qb3 a5 14.a4 Bf6 15.Rh1 Qe7 16.Bc4 O-O 17.hxg6 hxg6 18.Rh6 Kg7 19.O-O-O b5 20.axb5 cxb5 21.Bd5 Rb8 22.Rdh1 < Bb7 > 23.Bxf7 Rxf7 24.Ng5 a4 25.Qa2 Bxg5 26.Rh7+ Kf8 27.Rh8+ Kg7 28.R1h7+ Kf6 29.Rxf7+ Qxf7 30.Bxg5+ Kxg5 31.Qxf7 Rxh8 32.Qxd7 Rh1+ 33.Kb2 Bxe4 34.dxe5 Rf1 35.f3 Rf2+ 36.Ka3 Bf5 37.e6 Rxg2 38.Qd8+ Kf4 39.e7 Re2 40.e8=Q Rxe8 41.Qxe8 Bd3 42.Qd7 Be2 43.Qg4+ Ke3 44.Qe4+ Kd2 45.Kb4 Bd3 46.Qd4 Ke2 47.f4 Bc4 48.Qe4+ Kd2 49.Qxg6

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