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Yifan Hou vs Betul Cemre Yildiz
FIDE Women's Grand Prix Kazan (2012), Kazan RUS, rd 2, Jun-11
Spanish Game: Morphy Defense. Neo-Archangelsk Variation (C78)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-21-17
Premium Chessgames Member
  al wazir: Black is a piece and a pawn up, but is under some pressure.

I went with 24...Rg8 25. Rg4 (I can't see any other defense) Rxg4 26. Qxg4 Qxd1+ 27. Bxd1 Rxd1+ 28. Kg2 Rg1+ 29. Kxf2 Rxg4 30. fxg4, and now that all those pieces have been traded off, black's extra ♘ and ♙ ensure an easy endgame win.

But alas! 26. fxg4 spoils it.

Oct-21-17  Walter Glattke: Only hopping, after 10 moves still one knight and one pawn ahead as before.
Oct-21-17
Premium Chessgames Member
  JointheArmy: Missed Friday's puzzle, got Saturday's puzzle. That doesn't happen often.
Oct-21-17
Premium Chessgames Member
  WorstPlayerEver: 10 seconds for the doggie of the show to find -the obvious- 24... Rg8 😊
Oct-21-17
Premium Chessgames Member
  WorstPlayerEver: <JointheArmy>

Same here, but I found the friday puzzle rather curious. I didn't even consider Nb6.

Oct-21-17  bcokugras: Congratulations Betul!
Oct-21-17  mel gibson: I didn't see that.
I thought
24...Q x R+ looked good but it wasn't.
The computer says:

24. Rd1 Qg6 (24. .. Qg6
(♕d6-g6 ♕h5-g4 ♖d7xd1+ ♗b3xd1 ♖h8-g8 ♗d1-c2 ♕g6-g5 ♕g4xg5 ♖g8xg5 ♖e4-g4 ♖g5xg4 f3xg4 ♔f8-g7 ♔h1-g2 ♗f2-e1 ♗c2-e4 ♘c6-e5 ♗e4-b7 a6-a5 ♗b7-a6 c7-c6 ♗a6-c8 ♗e1xc3 ♔g2-g3 c6-c5 ♔g3-f4 c5-c4 ♗c8-f5 b5-b4 ♗f5-c2 ♔g7-f6) +5.48/20 212)

score for Black +5.48 depth 20

Oct-21-17  malt: Started with 24...Rg8 25.Rg4

came up with 24...Qg6 25.Qg4 R:d1+ 26.B:d1 Kg7 27.Kg2 Bc5

Oct-21-17  gofer: I looked at the "obvious" <24 ... Rg8>, but discarded it as white can play Rf1 amongst other things and we don't seem to make the best of our massive material advantage (N+P). So, I then looked around for any queen move that still protected my king against any checks, but also threatened either mate or a queen swap.

<24 ... Qg6>

The queen cannot be protected...

25 Rd5?? Qg1#

25 Re5/Rh4 Rxd1+ 26 Bxd1 Qg1#

The queen must move, but must protect against Qg1#

25 Qh3 Rxd1+
26 Bxd1 Qg1#

25 Qg4 Rxd1+
26 Bxd1+ Qxg4
27 fxg4 Bc5 -+

25 Qxg6 Rxd1+
26 Bxd1+ hxg6 (Kg2 Rg1+ 27 Kxf2 Rxg6 -+)
27 Bb6 Bc5 -+

~~~

Yep.

Oct-21-17
Premium Chessgames Member
  Once: Fritzie is saying that either 24...Qg6 or 24...Rg8 would give black a strong advantage of around-5.

In human mode I chose 24...Rg8, but 24...Qg6 seems more forcing. In either case, black dodges the white threats and emerges a piece up.

The biggest challenge seems to be to work through all the white defences for either 24...Rg8 or 24...Qg6.

So I think two solutions today. Either Rg8 or Qg6 ought to bring home the bacon. I marginally prefer Qg6 (and wish I'd spotted it) as it seems a little less hairy.

Oct-21-17  mel gibson: < ONCE - So I think two solutions today. Either Rg8 or Qg6 ought to bring home the bacon. I marginally prefer Qg6 (and wish I'd spotted it) as it seems a little less hairy.>

You're right - the other move
24...Rg8 is equal in power.
The computer DR4 - 64 bit says

(24. .. Rg8
25. Rf1 (♖d1-f1 ♕d6-d3 ♕h5-h3 ♗f2-c5 c3-c4 ♘c6-a5 c4xb5 ♘a5xb3 a2xb3 a6xb5 b3-b4 ♖d7-d4 ♕h3-c8+ ♖d4-d8 ♕c8-h3 ♗c5-d4 ♕h3-h6+ ♖g8-g7 ♕h6-h3 ♕d3-d2 ♖e4-g4 ♕d2xb4 ♕h3-h4 ♕b4-d6 ♖g4xg7 ♗d4xg7 ♖f1-g1 ♕d6-d3 ♕h4-b4+ ♔f8-g8 ♕b4-f4) -5.40/19 293)

score for white -5.40

Oct-21-17  bubuli55: Black is up a piece. 24...Rg8

Very difficult if White has compensation for the piece.

Oct-21-17  clement41: Harmony-wise, 24...Rg8! is so pleasing!
Oct-21-17
Premium Chessgames Member
  thegoodanarchist: Butter Creme defeated Who?
Oct-21-17  malt: <al wazir> Line 24...Rg8 25.Rg4 R:g4 26.Q:g4 Q:d1+ is a good for black

<But alas! 26.fxg4 spoils it>

26.fg4 Qg6 ( Threatening 27...Qe4#)
27.Q:g6 R:d1+ 28.B:d1 fg6

Oct-21-17  lowlife scum: Didn't see 24... Rg8.
Oct-21-17
Premium Chessgames Member
  Jimfromprovidence: I saw 24...Rg8 right away, so I never considered 24...Qg6.

One continuation is 25 Ree1 Bxe1 26 Rxd6 cxd6, where black trades her queen for two rooks.


click for larger view

Another line is 24...Rg8 25 Rf1 Rg6.


click for larger view

The bishop is untouchable as 26 Rxf2?? is a forced mate beginning with 26...Qd1+.

25...Rg6 also sets a trap for white's queen. If 26 Qxh7 then 26...Rh6!


click for larger view

Oct-21-17  dumbgai: Yildiz's only win vs Hou.
Oct-21-17  patzer2: I immediately saw 24...Qg6 -+, but figured that's too easy for a Saturday solution.

So I took a longer look and found 24...Rg8 -+ with the not-so-subtle threat 24...Rg8 25. Rxd6?? Rg1#.

P.S.: For me, yesterday's Friday puzzle was much more difficult than today's Saturday (24...?) test.

Oct-21-17  spazzky: <Jimfromprovidence> 25...Rg6 also sets a trap for white's queen. If 26 Qxh7 then 26...Rh6!

No that won't work because white can play 27 Re8+ Kxe8 28. Qg8+ Ke7 29 Qxf7 with a draw by perpetual

Oct-21-17
Premium Chessgames Member
  agb2002: Black is a knight and a pawn ahead.

White threatens Rxd6.

Black can prevent Rxd6 with 24... Rg8 and threatening Qxd1+ and mate next. For example 25.Rg4 (25.Rxd6 Rg1#; 25.h3(4) Qg3 looks winning) 25... Qe7 26.Qh6+ Ke8 27.Re4? Rxd1+ and mate next.

Oct-21-17
Premium Chessgames Member
  agb2002: Instead of 25... Qe7?, which allows mate soon after 26.Qh6+ Ke8 27.Rxg8+ etc., Black wins with 25... Rxg4 26.fxg4 Qf4 or 26.Qxg4 Qxd1+ and Black ends up a piece ahead in both cases.
Oct-21-17  Cheapo by the Dozen: I went with 24 ... Rg8 as well, and failed to account for 25 Rg4.

Black's core problem in the position, IMO, is that her queen is overloaded, needing to defend both h6 and the d7 rook. Her secondary problem is the need to keep up the defense of f7.

Oct-21-17  newzild: I went for 24...Rg8, with the idea 25. Rxd6 Rg1#

<al wazir> pointed out White's only viable defence of 25. Rg4, when it looks to me as though 25...Rxg4 26. fxg4 (not 26. Qxg4 Rxd1+ 27. Bxd1 Rxd1+ 28. Kg2 Rg1+, as pointed out by <al wazir>) Qe7 is winning for Black.

Oct-23-17
Premium Chessgames Member
  al wazir: <malt: 26.fg4 Qg6 ( Threatening 27...Qe4#)> So the win -- or at least the forced transition to an easy endgame -- was there all along.

Thanks, but that doesn't make me feel any better.

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