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Ding Liren vs Ernesto Inarkiev
"2015: Liren Review" (game of the day Dec-31-2015)
World Cup (2015), Baku AZE, rd 2, Sep-14
Queen's Gambit Declined: Exchange. Positional Variation (D35)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-08-17  Cheapo by the Dozen: One of the easiest Friday puzzles in a while.

White almost threatens mate. If he doesn't take advantage quickly, Black can chase and even trap his queen. The only real shot to divert Black's queen is the game line. Black's only real try at defense other than the game line is to move a night to attack Black's queen.

Wait. Two of the three possible knight attacks fail quickly and miserably. But

29 Bc2 N(e)f5
30 Bxe4 Nxh6
31 Rxh6 gxf4

isn't quite as obvious a win for White as the other lines.

OK. Maybe this is Friday-worthy after all. :)

Dec-08-17
Premium Chessgames Member
  al wazir: Got it, the first three moves anyway. This must have been easier than usual.
Dec-08-17  bcokugras: For black, why not 29. gxf4?
Dec-08-17  Amarande: Missed it, after initially thinking of Bc2 but it seemed the Bishop was important to keep.

The line I tried was 30 Ne6 Nxe6 (virtually forced, since Qxg7# and both Rooks are threatened, and Nf5? blocks the Queen) 31 Bxe6 Ng8 (the Bishop is immune, and 32 Bf5 is threatened) 32 Qh5, with what seems - unless I missed a major refutation somewhere - to be a good spot for White (Bf5 is still threatened and Black is sorely lacking for ways to reinforce his King's position, with f6 blocked and d7 and f7 under observation).

Dec-08-17  gofer: Hmmm, I ballsed this one up completely! I played <30 Ba2?!> with the same idea as <30 Bc2>, but without the panache or the win!!! <30 Ba2> threatens <31 Bb1> getting onto the b1-h7 diagonal and "forcing the queen sacrifice Qxb1". The continuation I thought would happen was...

30 Ba2 gxf4
31 Bb1 Qxb1
32 Rxb1 Kg8
33 Qxh7+ Kf7
34 Qe4 ...


click for larger view

But boy was I wrong! Bb1 is no good at all once Nf4 has been taken!

31 ... Qxd4+
32 Kh1 Kg8...

Doh!

Dec-08-17  gofer: <Amarande: 30 Ne6 Nxe6 31 Bxe6 ...>

The refutation you are looking for is probably...

<31 ... Qg6>


click for larger view

Dec-08-17  diagonalley: completely missed the key move :-( .... well done to our regulars who spotted it!
Dec-08-17  cocker: <Cheapo by the Dozen>: after 30 Bc2 N(either)f5, it's mate in one.
Dec-08-17  mel gibson: I feel angry -
I didn't see that simple combination.

The computer agrees with the puzzle solution but Black puts up a much better fight:

30. Bc2 (30. Bc2 (♗b3-c2 ♕e4xc2
♘f4-d3 ♕c2xd3 ♖h3xd3 ♘g7-f5 ♕h6-h3 ♘f5-d6 ♖d3-e3 ♘e7-d5 ♖e3-e6 ♔h8-g7 ♕h3-g3 ♘d6-f7 ♕g3-e1 ♖d8-d7 ♕e1-e4 ♘f7-d6 ♕e4-g4 h7-h6 h2-h4 ♔g7-g6 ♖f1-f3) +1.99/20 70)

score for White +1.99 depth 20

Dec-08-17  malt: Looked at 30.Ba2, missed the key move.
Dec-08-17  patzer2: Missed today's Friday (30. ?) puzzle, which cleverly combines the decoy/deflection tactic 30. Bc2! Qxc2, the obstruction tactic 31. Nd3! Kd8 and the discovered attack with check tactic 32. Qxh7+ Kf7 33. Ne5+ Ke6 34. Qxf2 +- to win the Queen for two minor pieces.

P.S.: For an improvement for Black, Stockfish 8's suggestion 19...Rde8 = (0.00 @ 34 ply) is better than the game move 19...Bxe2 allowing 20. Nxe2 ⩲ (+0.22 @ 34 ply).

Dec-08-17  JohnBoy: The above exchange between <ajile>, <perfidious>, and self is a model for polite, respectful pursuit of understanding.
Dec-08-17  morfishine: I got <30.Bc2> but thats about it

According to previous discussion, Black could've put up much tougher resistance, but thats chess

*****

Dec-08-17  BOSTER: <C by the D>:<29 Bc2 Nef5 30.Bxe4>. 30.Qxh7#.
Dec-08-17
Premium Chessgames Member
  kevin86: White lures the queen away from h7, then locks her out and goes after the pawn...soon winning said queen.
Dec-08-17  awfulhangover: Yes! Found the Bc2-Nd3 idea! Good enough for me ...
Dec-08-17  Patriot: I found the game moves thru 34...Qxc2 which surprised me since strong regulars didn't. But that wasn't easy.
Dec-08-17  Patriot: Sorry I meant 34.Qxc2.
Dec-08-17  unferth: is there bad blood between these guys? trying to understand why this game doesn't end at move 33...
Dec-08-17  QueenMe: Got this immediately; all the way through capture of the queen. Now I need to get Photoshop to put a halo around my avatar.
Dec-08-17  njchess: It took me a looong time to find the game line. I found Bc2 easily enough, but until I followed it with Nd3!, it didn't make much sense. And even then, it took me a moment to realize that Black's queen couldn't just take the knight. Then, it all fell into place, including the nifty Ne5+. So smooth.
Dec-08-17
Premium Chessgames Member
  agb2002: White has a bishop for a knight and a pawn.

Black threatens gxf4, Qxd4+, Rxd4.

The attempt of obstruction 30.Ng6+ is met with 30... Qxg6 but this suggests the maneuver Be6-f5 starting with 30.Ne6. However, after 30... Nxe6 31.Bxe6 Ng8 (31... Qxe6 32.Qxh7#; 31... Qxd4+ 32.Kh1 Qe4 33.Bf5 wins decisive material) 32.Qh5 h6 33.Bxg8 (33.Bf5 Qxd4+ 34.Kh1 Qd6 35.Qg6 Qe7 and the attack seems to vanish) 33... Kxg8 34.Qxh6 Qxd4+ 35.Kh1 Rd7 seems to hold.

If blocking on f5 does not work perhaps it would work on d3, so 30.Bc2:

A) 30... Qxc2 31.Nd3 Kg8 32.Qxh7+ Kf7 33.Ne5+ and 34.Qxc2 wins decisive material.

B) 30... Qxd4+ 31.Kh1 Kg8 32.Ne6 and the double threat Qxg7# and Nxd4 wins (32... Nxe6 33.Qxh7#).

Dec-08-17
Premium Chessgames Member
  Dionysius1: Can someone explain the "2015:Liren Review" pun to me please?
Dec-08-17
Premium Chessgames Member
  saffuna: "2015:Year in Review"
Dec-08-17
Premium Chessgames Member
  thegoodanarchist: I didn't get close to solving this one.
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