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Yifan Hou vs Hans-Joerg Cordes
Tradewise Gibraltar (2015), Catalan Bay GIB, rd 1, Jan-27
French Defense: Steinitz. Boleslavsky Variation (C11)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Jan-27-15  Severin: 38 ... Kg5?????????????????
Jan-27-15  suenteus po 147: Very close to the time control, I imagine that Cordes was feeling more than just the time pressure. 39...Kf5 is met with 40.Rf1, a nasty little pin that leads to devastating loss of material for black.
Jan-27-15  Marmot PFL: A bad blunder, but after the queen trade the ending is (I think), winning for white.
Jan-28-15  bondll: <Marmot PFL: A bad blunder, but after the queen trade the ending is (I think), winning for white.>

After 38...Qxe3 Rybka4 plays it out to a draw in numerous lines.

Jan-28-15  kamagong24: whoa!
Jan-28-15  dehanne: https://www.flickr.com/photos/johnc...

About to move 21.Bg4

Jan-28-15  Marmot PFL: <bondll> I was able to win 2 of 3, but I have a weak computer.
Jan-28-15  suenteus po 147: I saw the following: 39...Kf5 40.Rf1 Bf3 41.Qxf4 Kxf4 42.gxf3 Rxe5 43.Rb1 and white's passed pawns win. I'm sure there are improvements to be made in this line for black, but nothing that seems like it would draw the game.
Jan-28-15  Conrad93: Bondll, something is wrong with your PC.

There is no way it's a draw.

Jan-28-15  Doniez: Congrats to HOU, she is now the highest rated woman, after I can't remember how many years of Polgar domination
Apr-12-16
Premium Chessgames Member
  gawain: It has to be 39 h4+ intending to deflect the king. And if B replies 39...Kf5 then 40 Rf1 wins the queen.
Apr-12-16
Premium Chessgames Member
  Penguincw: What kind of Tuesday puzzle is this?! Or is it even Tuesday?

39.h4+ I considered, but after 39...Kf5, I couldn't find a good continuation. Perhaps someone can enlighten me.

The solution I went with was to exchange queens and then do a mad dash with the boards, but it'll fail.

Apr-12-16
Premium Chessgames Member
  Breunor: After 35 h4 Kf5, white can play 40 Rf1, I think that wins.
Apr-12-16  dark.horse: 39...Kf5 40.Rf1
Apr-12-16  DrGridlock: <Penguin>
After 39 ... Kf5, white responds with 49 Rf1.

Black's queen is pinned to the king on the f-file, so he cannot exchange queens. His best play is to take White's rook, but this looses a queen for a rook.

Apr-12-16  stingray0104: Black can opt to lose the bishop rather than trade queen for rook with 39...Kf5 40. Rf1 Bf3 but white's plethora of passed pawns should be too much.
Apr-12-16  zb2cr: 39. h4+, Kf5; 40. Rf1 pins the Black Queen. At that point, 40. ... Bf3 appears to lose the least material for Black. One possible line was suggested by <suentus po 147>, above.
Apr-12-16  hypercorby: If Mr. Cordes had captured the white queen, the end-game would be in his favor. Or, would not? Anyway, that blunder make me feel energized.
Apr-12-16  nalinw: I had done far too much work for a Tuesday

39. h4 Kf5
40. Qd3+ Ke6
41. Qd6+

and now

41. ... Kf7
42. e6+

and

41. .. Kg7
42. Qe7+

and

41. ... Kf5
42. Qf6#

when I saw Rf1 and remembered what day of the week it was!

I didn't see ... Bf3 as a response but I claim a full point if my other solution is correct.

Apr-12-16  nalinw: Oops - cancel

41. ... Kg7 in the post above.

Apr-12-16
Premium Chessgames Member
  Tiggler: <Breunor: After 35 h4 Kf5, white can play 40 Rf1, I think that wins.>

Probably correct, but white can do better:

40 Qd3+ Be4 (..Ke6 41 Qd6+ Kf7 46 e6+ Kg7 47 Qxf4 etc.)

41 Qd7+ Re6 (..Kxe5 42 Qxe8+ Kd5 43 Qc6+ then trade everything on e4 and walk the a and/or b pawns home)

42 b6 Kxe5
43 b7 Kf5 (otherwise the b-pawn queens)
44 Rf1 Qxf1
45 Kxf1 Bxb7
46 Qxb7 and wins easily

Apr-12-16  devere: Of course 38...Kg5?? was a losing move, and 38...Qxe3 would draw.

A cute winning line is 39.h4+ Kf5 40.Qd3+ Be4 41.Qd7+ Re6 42.b6 Qxe5 43.Rf1+ Bf3 44.b7 Qb8 45.Qc8 Qg3 46.Qc2+ Re4 47.a6 Ke6 48.a7


click for larger view

Now on 48...Re2 both Qxe2+ and Qg6+ are crushing.

Apr-12-16  saturn2: White can regain material and get a won rook ending by 39 h4 Kf5 40 Rf1 Bf3 41 QxQ KxQ 42 gxBf3
Apr-12-16
Premium Chessgames Member
  agb2002: White has three pawns for a bishop.

White can achieve a won ending with 39.h4+ Kf5 (else 40.Qxf4) 40.Rf1 Bf3 41.Qxf4+ Kxf4 42.a6:

A) 42... Kxe5 43.gxf3 Kd6 (43... gxf3 44.Re1+ and 45.Rxe8) 44.fxg4 + - [3P].

B) 42... Rxe5 43.b6 and Black can't stop the pawns. For example, 43... Kg3 44.gxf3 gxf3 45.b7 Rb5 46.a7 Rxb7 48.a8=Q wins.

C) 42... Kg3 43.gxf3 gxf3 44.b6 wins (44... Rxe5 45.b7 Rb5 46.a7 Rxb7 47.a8=Q).

Apr-12-16
Premium Chessgames Member
  whiteshark: <39.h4+!> I have come here to chew bubblegum and kick ass...and I'm all out of bubblegum.
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