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Magnus Carlsen vs Shakhriyar Mamedyarov
GCT Croatia (2019), Zagreb CRO, rd 4, Jun-29
English Opening: Anglo-Indian Defense. King's Indian Formation (A15)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Jun-29-19  SandyJames: Shak almost got him!
Jun-29-19
Premium Chessgames Member
  perfidious: Magnus Carlsen, aka <The Snake>--he is one resourceful, slippery bugger.
Jun-29-19  csmath: Opening is actually fantastic position for white, it is amazing how it fiddled away. Great struggle, not a great game.
Jun-29-19
Premium Chessgames Member
  chancho: Alejandro Ramirez was saying in the broadcast that missing 15.Bc4 is where Magnus started to go wrong.
Jun-30-19  Ulhumbrus: 5 h4?! starts an attack with hardly enough advantage to justify it.

It also moves a pawn in the opening, and so loses a tempo.

The latter point suggests that Black can appropriate the advantages of the first move by transposing into an English oipening reversed by 5...c5!

Jun-30-19
Premium Chessgames Member
  MissScarlett: <Carlsen–Mamedyarov, analysis after 12… Nd7

Score: +2.57

PV: 13. Bc4 Nd7 14. Qb3 e6 15. cxd4 Re8 16. Nxe6 Bxe4 17. Nxd8 Bc2+ 18. Qe3 Raxd8 19. Rb2 Rxe3+ 20. Bxe3 Bf5 21. O-O Nf6 22. Re2 Rd7 23. Rc1 Rd6 24. Bb3 Nd5 25. Bg5 Be6 26. Rec2 Bd7 27. Rd2 Kh7 28. a4 a6 29. a5 Be6 30. Bxd5 Rxd5 31. axb6 Rxg5 32. Rb1 Bf8 33. b7 Bd6 34. b8=Q Bxb8 35. Rxb8 Bd5 36. f4 Rh5 37. Rb6 g5 38. fxg5 Rxg5 39. Rd6 Bc4 40. Rf2 Bd5 41. Rxa6 Kg8

6,387,914,334 nodes, 33,543,451 nodes/sec, depth 40 ply (62 selective), 123,215 Syzygy hits>

Kasparov, interviewed during the game, said that he didn't see the idea 14.Qb3 after 13.Bc4 Nd7 either (as Carlsen admitted later), and was fixated on 13.Bc4 Qc7? 14.Qg4 Qxc4 15.Rh8+ winning.

Jun-30-19
Premium Chessgames Member
  whiteshark: <chancho: ..missing 15.Bc4 is where Magnus started to go wrong.> Here's my short analysis: <15.Bc4!> +-


click for larger view

<13...Nd7 14.Qb3! e6 15.cxd4>


click for larger view

a) 15...Rc8 16.e5 Rxc4 17.Qxc4 Bxg2 18.Rh2 Bd5 19.Qd3 Re8 20.Qh3 (or 20.f4) Nf8 21.Nh7 Bf3 22.Qxf3 Nxh7 23.Be3 (White is an Xchg up and Black's minor pieces are restricted)

b) 15...Re8 16.Nxe6 Bxe4 17.Nxd8 Bc2+ 18.Qe3 Raxd8 19.Rb2 Rxe3+ 20.Bxe3 Bf5 21.0-0 (White is the Xchg up)

Both lines result in 'technical winning positions' for White with big blunder potential for us (mere) mortal patzers.

Jun-30-19  Ulhumbrus: In my last message <oipening> should read <opening> so that the post should read as follows:

5 h4?! starts an attack with hardly enough advantage to justify it.

It also moves a pawn in the opening, and so loses a tempo.

The latter point suggests that Black can appropriate the advantages of the first move by transposing into an English opening reversed by 5...c5!

Jun-30-19  sudoplatov: How does White handle 13.Bc4 Nd7 14.Qb3 Ne5? [? for the sentence, not the move]
Jun-30-19
Premium Chessgames Member
  MissScarlett: Same idea, no? 15.cxd4 and Nxc4 invites 16.Rh8+
Jun-30-19  Eyal: Yeah, 13.Bc4 Nd7 14.Qb3 Ne5 15.cxd4 Nxc4 (15...Qxd4 16.Qh3) 16.Rh8+! Bxh8 17.Qh3 Kg7 18.e5! and mate.
Jun-30-19  Eyal: As Carlsen himself noted after the game, <12.Bd3!> should also give White a huge advantage - but without having to be super-precise in his calculations ("it's just completely busted - he has no counterplay. Nc6 is always met by d5 and my kingside attack is just playing itself"); so in this regard it was better from a practical viewpoint. 12.Ng5 is also good (and more directly forcing - which is why it's tempting), but then you have to see 13.Bc4 and all the rest after 12...cxd4.
Jul-07-19
Premium Chessgames Member
  guenther42: Whoops! Not Aronian, but Mamedyarov.

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