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Hao Wang vs Magnus Carlsen
Biel Chess Festival (2012), Biel SUI, rd 7, Jul-30
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation Quiet Line (E15)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 6 OF 11 ·  Later Kibitzing>
Jul-30-12  Ulhumbrus: 36...Kg8 instead of 36...Qb2+ suggests that Carlsen thinks that he has a chance to win. He does have an extra pawn, and although White's pieces seem placed well it does not take much to turn a promising position into a lost position. Wang Hao has prevented ..Qb2 by 37 Rd2.
Jul-30-12
Premium Chessgames Member
  OBIT: Hao only has a couple of minutes on his clock. I'm sure Carlsen want to at least play to the time control.
Jul-30-12  Ulhumbrus: 38...Nf8-d7 keeps the knight on d3 out of the square e5
Jul-30-12  Eyal: Bologan-Bacrot drawn. Not very important for the standings, but I suppose both have a reason for being at least mildly satisfied - Bologan for finally not losing and Bacrot for finally not losing with the KID.
Jul-30-12
Premium Chessgames Member
  WannaBe: 38. Nd3, why white didn't want to play e5 and back up the knight with a pawn? And leave that (d6) knight there?
Jul-30-12
Premium Chessgames Member
  Gypsy: <38.Nd3> Black now has to deal with the threat of Ne5 and Nxf7.
Jul-30-12  Marmot PFL: I white plays e5 black plays Nd5
Jul-30-12
Premium Chessgames Member
  Gypsy: <40. Rc2 c5> I'd say Black is gaining ground; and it is now White who needs to prove a draw.
Jul-30-12  Eyal: <WannaBe: 38. Nd3, why white didn't want to play e5 and back up the knight with a pawn? And leave that (d6) knight there?> The Black knight would get a very good outpost on d5.
Jul-30-12  Marmot PFL: Black has Rb4 option now, sacrifice the exchange for a supported passed pawn. Not easy to assess that.
Jul-30-12  Ulhumbrus: Wang Hao may have little choice but to settle for a draw after winning the a5 and c5 pawns in return for the a4 pawn
Jul-30-12  Eyal: 41.Qxa5 should lead to a draw after 41...Qxa5 42.Nxa5 Ra8 43.Nb7 Rxa4 44.Nb/dxc5 eliminating all Q-side pawns.
Jul-30-12  watwinc: Is Wang trying to lose?
Jul-30-12  Ulhumbrus: One way for Black to get into trouble is 41 Nd3-e5 Nxe5?! 42 Nxe5 Rb4?! 43 Qxc5 Rxa4 44 Qe7 and suddenly Black is unable to defend the f7 pawn. However this sequence is not forced eg Black has the alternative of 42...Rc8
Jul-30-12  Ulhumbrus: 41...Rb7 may turn out to be a mistake after 42 Rxb7 Qxb7 43 Nxa5 because Black's passed c pawn is blockaded and White's more distant passed a pawn is not.
Jul-30-12  haydn20: 42. Rxb7 Qxb7 43. Qb2 Qa6 and Black has maybe a +0.5 "machine advantage"--not enough to win.
Jul-30-12  talisman: trade queens, get the c pawn, draw.
Jul-30-12  talisman: ♕b2....
Jul-30-12  haydn20: I meant White has a machine adv. oc
Jul-30-12
Premium Chessgames Member
  OBIT: It's strange how Houdini gave Hao a 0.42 advantage after Rxb7, then a 0.17 advantage after Carlsen played the totally forced Qxb7
Jul-30-12  haydn20: <Ulhumbrus> I've been thinking for several moves that the a pawn is better than the c pawn as you noted.
Jul-30-12  Ulhumbrus: <haydn20: <Ulhumbrus> I've been thinking for several moves that the a pawn is better than the c pawn as you noted.> Then I acknowledge your thought for several moves.
Jul-30-12  haydn20: Just noting that for once I was up to speed with you. Usually I'm several moves if not several variations behind :)
Jul-30-12  Eyal: 43.Nxa5 wouldn't have brought White anything subtantial after 43...Qa6; 43.Qxa5? actually loses to Qb3 44.Ndb2 Ne5! or 44.Ncb2 Qc2+ followed by 45...c4 (but not 44...c4 immediately because of 45.Qb4!).
Jul-30-12  Marmot PFL: 42...Nb6 is a clever move as the knight is poisoned.
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