chessgames.com
Members · Prefs · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing


register now - it's free!
Yifan Hou vs Koneru Humpy
Women's World Chess Championship (2010)  ·  Spanish Game: Berlin Defense. l'Hermet Variation Berlin Wall Defense (C67)  ·  1-0
To move:
Last move:

explore this opening
find similar games 34 more Yifan Hou/Koneru games
PGN: download | view | print Help: general | java-troubleshooting

TIP: All games have a Kibitzer's Corner provided for community discussion. If you have a question or comment about this game, register a free account so you can post there.

PGN Viewer:  What is this?
For help with the default chess viewer, please see the Pgn4web Quickstart Guide.

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-18-10  thickhead: <Ezzy ><44.Be7?<Loses her advantage and leads to a draw> Bc7??< Disappointing. I would guess that a 2600 GM should be able to calculate that 44...Kxe7 should draw. It looks scary, but most lines are forced. Or perhaps I'm being too harsh sat here with my computer. [44...Kxe7 45.Kxg6 Bd8 46.h4 Kf8 47.h5 Kg8 48.h6 Bh4 49.h7+ Kh8 50.Kf7 Kxh7 51.Kxe6 Kg7 52.Kd7 Kf8 53.e6 Bf6 54.f5 Be7 55.Kxc6 Kg7 56.Kb6 Kf6 57.Kxa5 Kxf5 58.Kb6 Bd8+ 59.Kxc5 Kxe6 60.Kb5 Kd7 61.a5 Kc8 62.c5 Kb8 63.a6 Ka8 And a draw.]> The moves are not at all forced.I am using manual analysis by altering moves on the game diagram of this page only and have no access to any other software for analysis.when I played over the above variation on 47... kg8 I felt 48 f5 is winning for white. White need not keep on moving h pawn till its extinction but keep it at h5 and use it for diversion. position after 47.... Kg8<EZZY>


click for larger view

Here 48.f5 releases another pawn. 48....exf5(forced)49.Kxf5 should win. If 49... Kh7 50.Ke6 or if 49... Bc7(to prevent K from moving to d7 or f7) kf6.

Dec-18-10  thickhead: White had bad bishop vs blck's good bishop.Moral of the story is constricted position is worse than posseessing bad bishop.
Dec-18-10  thickhead: While seeing live game I thought 47.c5 is a mistake on white's part but it was useful to restrict black still further.also I thought it black's mistake to take the pawn by 50... Bxc5.Later I realized that black would be forced to take the pawn any way with one tempo behind.e.g. 50..... Bd8
51.Bh4 Bc7
52.Bf6 Kf7
53.Kg5 Bb8
54.Bd8 Ba7
55.Bxa5 Bxc5
Dec-18-10  thickhead: Wait,wait!In my latest comment 55.Bb6 instead of 55.Bxa5 wins for white straight away.So Humpy was right in going ahead with 50...Bxc5 and try if a chance for draw exists later.
Dec-18-10  thickhead: 69..... Bf2 was final mistake.69.... Bb4 would hold the position If 70.Bd8 for advancing a4-a5 70... Bd2 seems adequate.
Dec-18-10  Ezzy: <thickhead: I felt 48 f5 is winning for white.>

Here are the variations to show white can't win.

[44...Kxe7 45.Kxg6 Bd8 46.h4 Kf8 47.h5 Kg8 48.f5 exf5 49.Kxf5 Kf7 <(49...Kg7 50.Ke6 Bc7white can't make any progress)> 50.h6 Bh4 51.h7 Kg7 52.Ke6 Bg3! white can't make any progress.]

Dec-18-10
Premium Chessgames Member
  Eyal: <Ezzy: Hou Yifan kept the pressure on and then erred with 44 Be7? which leads to a draw> Im not sure she erred is there any clear winning plan without it?

<thickhead: when I played over the above variation on 47... kg8 I felt 48 f5 is winning for white. White need not keep on moving h pawn till its extinction but keep it at h5 and use it for diversion. position after 47.... Kg8<EZZY>


click for larger view

Here 48.f5 releases another pawn. 48....exf5(forced)49.Kxf5 should win. If 49... Kh7 50.Ke6 or if 49... Bc7(to prevent K from moving to d7 or f7) kf6.>

<Ezzy> is right, this should still be a draw: 48.f5 exf5 49.Kxf5 <Kf7> 50.h6 Bh4! 51.h7 Kg7 52.Ke6 Bg3! (or, alternatively, 50...Kf8 51.h7 Kg7 52.Ke6 Bc7!).

<69..... Bf2 was final mistake.69.... Bb4 would hold the position If 70.Bd8 for advancing a4-a5 70... Bd2 seems adequate.>


click for larger view

I think White is still winning here, with the following idea: 70.Bf8 Kb6 71.Bd6 Kc6 72.Be7 Kb6 73.a5+! Kxa5 (73...Bxa5 74.Bd8+) 74.Bxc5 Bd2 75.Bd4! and the king invades via c5.

Dec-18-10  Ezzy: <Eyal: Im not sure she erred is there any clear winning plan without it>

I think you're right there <Eyal>. 44 Be7? was a bit hasty from me. There doesn't seem to be any other winning plan. Perhaps 44 Be7 deserves a ! because it gives the opponent chances to go wrong, which she did.

Fair enough, I'll promote 44 Be7? to 44 Be7! :-)

Dec-18-10
Premium Chessgames Member
  Eyal: <Ezzy> Actually, maybe you can demote it back to "?"... As <percyblakeney> noted (a bit cryptically) above, the "solution" might be <44.h4> - in order to implement the same plan with a gain of an important tempo: 44...Bc7 45.Kh7 Bb6 and now 46.Be7: 46...Kxe7 47.Kxg6 Kf8 (47...Bd8 would lose now, because the pawn already got to h4 and so there's time for 48.Kg7) 48.h5 Bd8 49.h6 Kg8 50.h7+ Kh8 51.Kf7 Kxh7 52.Kxe6 seems to be winning.
Dec-18-10  Ezzy: <Eyal: Actually, maybe you can demote it back to "?"...> :-)

44 h4! is a good move. Just goes to show how tricky these endgames are.

Because they're tricky, perhaps a demotion back to ? is now a little unfair. But I suppose technically it is a mistake, and practically it was a decent decision to play 44 Be7 in the heat of battle.

Anyway, cheers <Eyal> - I learn a lot by your enthusiasm to dig that little bit deeper. It made this game even more enjoyable.

Dec-18-10  Ezzy: Actually, I deserve a ? for not realising fully why I put 44 Be7? in the first place :-)
Dec-18-10  thickhead: Before going to sleep ( I am in India) I had thought of delaying Be7 by white by 44.h4 but on getting up already it is posted but my concern is whether declining is better now for black as h4 is a new target for black bishop and the squre h4 will be not available to white bishop for shifting sides.e.g. 44.h4 Bc7 45.Be7 Bb6 and now
if 46.Bd6 Bd8 and
if 46.Kg5 Kg7
I shall not analyse further. all my previous analysis in this game proved wrong
Dec-19-10  thickhead: O.K
44.h4 Bc7
45.Be7 Bb6
46.Kh7 Zwugzwang
Dec-19-10  Ezzy: <Eyal:> Just read the chessbase report, and they're more brutal than I was, giving 44 Be7??
Dec-19-10  danbotea05: Ezzy, what you say about : 44....Kxe7 45 Kxg6 Bd8 46 h4 Kf8 47 h5 Kg8 48 h6 Bh4 49 h7+ Kh8 50 Kf7 Kxh7 51 Kxe6 Kg7 52 Kd7 Kf8 53 f5! Bg3 54 e6 Bh4 55 Kxc6 Be7 56 Kb5 Bd8 57 Kc5 Ke7 58 Kd5! Kf6 59 c5 and white wins.... And it s obvious that at 53...Be7 comes 54.f6.... The move 44.Be7!!! is genious !!!
Dec-19-10
Premium Chessgames Member
  Eyal: <Ezzy> Yeah, that's pretty funny... Btw, I've noticed that they also took care to hold back with Be7 until move <46>, after the black bishop goes back to b6 - the waiting move in their line is 45.Bg5 instead of 45.Kh7 in mine, but it doesn't make a real difference.

<danbotea05: 44....Kxe7 45 Kxg6 Bd8 46 h4 Kf8 47 h5 Kg8 48 h6 Bh4 49 h7+ Kh8 50 Kf7 Kxh7 51 Kxe6 Kg7 52 Kd7 Kf8 53 f5! Bg3 54 e6 Bh4 55 Kxc6 Be7 56 Kb5 Bd8 57 Kc5 Ke7 58 Kd5! Kf6 59 c5 and white wins....>

It's still a draw after 55...Kg7! (instead of ...Be7??) 56.Kxc5 Be7+ followed by 57...Kf6.

Dec-19-10  thickhead: <Eyal ::It's still a draw after 55...Kg7! (instead of ...Be7??) 56.Kxc5 Be7+ followed by 57...Kf6> After 55.... Kg7
56Kxc5 Be7+
57Kd5 kf6
58 c5!!!
Dec-19-10
Premium Chessgames Member
  Eyal: <After 55.... Kg7 56Kxc5 Be7+ 57Kd5 kf6 58 c5!!!>

Then 58...Bd8!!!!!!!!! (serioulsy, White can't make progress here - 59.c6 Bc7, or 59.Kc6/d6 Be7+).

Dec-19-10  danbotea05: Eyal, after 55...Kg7 56 Kb5 Bd8 57 e7 Bxe7 58 Kxa5 Kf6 59 Kb5 Bd8 (at 59... Kf5 60 a5 Bd6 61 a6 Bb8 62 Kc5 Ba7 63 Kd6 Bb8+ 64 Kc6 Ba7 65 Kb7 Bd4 66 a7 Ba7 67 Ka7 Ke5 68 c5 ) 60 a5 Bxa5 61 Ka5 Kxf5 62 Kb6 Ke6 63 Kxc5 Kd7 64 Kb6 and 1-0
Dec-19-10
Premium Chessgames Member
  Eyal: <danbotea05: Eyal, after 55...Kg7 56 Kb5 Bd8 57 e7 Bxe7 58 Kxa5 Kf6 59 Kb5 Bd8 (at 59... Kf5 60 a5 Bd6 61 a6 Bb8 62 Kc5 Ba7 63 Kd6 Bb8+ 64 Kc6 Ba7 65 Kb7 Bd4 66 a7 Ba7 67 Ka7 Ke5 68 c5 ) 60 a5 Bxa5 61 Ka5 Kxf5 62 Kb6 Ke6 63 Kxc5 Kd7 64 Kb6 and 1-0>

The mistake that allows White to win here occurs on move 59 - Black should play 59...Ke5! with the idea 60.a5 Kd6 61.a6 Kc7 (or 61.Kb6 Bd8+).

Dec-19-10
Premium Chessgames Member
  Eyal: ...But I have to admit it's rather tricky - those lines are interesting, and Black has to play very accurately in order to hold the draw.
Dec-19-10  thickhead: <EYAL: the waiting move in their line is 45.Bg5 instead of 45.Kh7 in mine, but it doesn't make a real difference.> It maks no difference in < Bishop offer accepted variation> but in < Bishop offer declined variation> white plays somewhere h5 when attacked by Black's bishop from d8 and white K must be at h6 to recapture.
Dec-19-10  thickhead: <EYAL:: 58.....Bd8!!!! > You are right. I assumed that pawns c6,e6 and f5 are self sustaining without king support and white king can invade through a6 b7 route.Whereas e6 and f5 are safe c6 is not.
Dec-20-10  Akavall: During the game I thought that 44. Be7!?? was a brilliant move. What a crazy endgame!
Dec-20-10  shalgo: I have analyzed this game at my blog:

http://shalgochess.blogspot.com/201...

Some of my conclusions (subject, of course, to correction by any of you):

36.gxh5! was stronger than 36.Bh4.

44.Be7? Kxe7! draws, for many of the reasons identified here plus some more I note.

52.Kf3?! makes the win harder.

60.f5! wins.

If Koneru had played 69...Bb4, Hou could still have won by 70.Bf8 Kb6 71.Bd6 Kc6 72.Be7 (triangulating) Kb6 73.a5+!

For the details, see my blog! I welcome all comments and corrections.

< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
NOTE: You need to pick a username and password to post a reply. Getting your account takes less than a minute, totally anonymous, and 100% free--plus, it entitles you to features otherwise unavailable. Pick your username now and join the chessgames community!
If you already have an account, you should login now.
Please observe our posting guidelines:
  1. No obscene, racist, sexist, or profane language.
  2. No spamming, advertising, or duplicating posts.
  3. No personal attacks against other users.
  4. Nothing in violation of United States law.
Blow the Whistle See something that violates our rules? Blow the whistle and inform an administrator.


NOTE: Keep all discussion on the topic of this page. This forum is for this specific game and nothing else. If you want to discuss chess in general, or this site, you might try the Kibitzer's Café.
Messages posted by Chessgames members do not necessarily represent the views of Chessgames.com, its employees, or sponsors.
Spot an error? Please submit a correction slip and help us eliminate database mistakes!
This game is type: CLASSICAL (Disagree? Please submit a correction slip.)

Featured in the Following Game Collections [what is this?]
32a_B:B=; same colour
by whiteshark
Women's World Chess Championship 2010 Rd.5.1
from Women's Chess Games (2010) by wanabe2000
74.h5!
from Endgames by Portusboy
Women's World Championship
from Blunderdome's favorite games of 2010-2011 by Blunderdome


home | about | login | logout | F.A.Q. | your profile | preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | new kibitzing | chessforums | Tournament Index | Player Directory | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | privacy notice | advertising | contact us
Copyright 2001-2014, Chessgames Services LLC
Web design & database development by 20/20 Technologies