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Tigran Gharamian vs Quang Long Le
Lucopen (2015), ?, rd 4, May-06
Caro-Kann Defense: Advance. Short Variation (B12)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
Sep-09-16
Premium Chessgames Member
  iking: nice combo in d end.
Sep-09-16
Premium Chessgames Member
  patzer2: Got 23. Rxf5! for my Friday puzzle solution, after which I anticipated 23...exf5 24. Ng6 (3.38 @ 22 depth, Stockfish 6).

However after 23. Rxf5!, the stronger defense 23...fxe5 caught me off guard.

Instead of the strong winning follow-up 24. Bc4! (+3.39 @ 23 depth, Deep Fritz 15), I chose the weaker 24. Rxe5 which fizzles out to only a slight White advantage after 24. Rxe5 Rf7 25. Re7 Rxe7 26. dxe7 Kf7 27. Bg4 Nc7 28. Rc5 Ne8 29. Bf3 Rb8 30. e4 b6 31. Rc6 Rb7 32. e5 Rxe7 33. a4 (+ 0.61 @ 22 depth, Deep Fritz 15.

Black's game takes a turn for the worse after 12...Be7?, allowing 13. dxc5 Bxc5 14. b4 (+1.34 @ 28 depth, Komodo 9.3). Instead 12...a6 13. Rc1 b5 (0.53 @ 40 depth, Stockfish 240814) gives Black a fighting chance.

Earlier in the opening, instead of 8...dxc4 9. Nxc4 , I prefer keeping the tension with 8...a6 9. dxc5 d4 = as in the amusing draw in Naiditsch vs Leko, 2012.

Sep-09-16  Cheapo by the Dozen: I didn't quite see how much of a bind Black was in, so I didn't see how strong 24 Ng6 is. Well-done, <patzer2>!
Sep-09-16
Premium Chessgames Member
  al wazir: I found 23. Rxf5 right away, and saw the win after 23...exf5 24. Ng5 Rf7 25. Bc4. But after 23...fxe5 I wanted to play 24. Rxf8+, which may not win and in any case isn't straightforward. 24. Bc4 is much stronger.
Sep-09-16
Premium Chessgames Member
  gofer: The start is easy...

<23 Rxf5 ...>

...as the rook is immune...

23 ... exf5
24 Ng6 Rc8 (Rf7 Bc4 )
25 Nxf8 Kxf8
26 Bh5 g6
27 Bxg6 Ng7
28 Rf7+ Kg8
29 Rxb7

<23 ... fxe5>

Did I find the very strong <24 Bc4!> at this point?

Nope, I went for the far more mundane <24 Rxf8>, but like <al wazir> I didn't think that it was so fantastic, but its better than <24 Rxe5 Rf7>.

24 Rxf8 Kxf8
25 Bh5 Nf6
26 Rf7+ Kg8
27 Bg6 ...

This looks to be winning for white...


click for larger view

So I don't think you have to find <24 Bc4!> to consider that the win is there after <23 Rxf5>, but anyone that does find it "is a better man than me"...

Sep-09-16  diagonalley: excellent puzzle!
Sep-09-16  morfishine: Fun position to work on
Sep-09-16  et1: White's first move is pretty obvious, the rest...not quite at all.
Sep-09-16  Kasparov Fan: I saw this 23.Rxf5
and then 23...exf5
24.Ng6 and now the position looks very good for white. For 23..fxe5 I considered both 24.Rxf8 and 24.Bc4+ I chose the 24.Bc4+ as it is much more forcing and after that it is over.
Sep-09-16  dfcx: white wants to play Ng6 but the bishop is guarding it. Taking out the defender solves the problem.

23.Rxf5

A. 23...exf5 24.Ng6 Nxd6 25.Nxf8 Rxf8 26.Rxd6

B. 23...fxe5 24.Bc5 Rxf5 25. Bxe6+ Kf8 26.Bxf5

Sep-09-16
Premium Chessgames Member
  catlover: Saw 23. Rxf5, but did not see how to carry it through to a win. No points.
Sep-09-16
Premium Chessgames Member
  patzer2: <Cheapo by the Dozen> Thanks! Initially, I wasn't sure why my 23. Rxf5! fxe5 24. Rxe5 wasn't as strong as 23. Rxf5! fxe5 24. Bc4! .

However, after reflecting on it this morning, I realized 23. Rxf5! fxe5 24. Rxe5 allows Black strong counter play with 23...Rf7 (diagram below)


click for larger view

when (in the diagram above) White has nothing better than 25. Re7 Rxe7 26. dxe7 (0.52 @ 21 depth, Deep Fritz 15) with a slight edge but no clear win.

In contrast, the game continuation 23. Rxf5! fxe5 24. Bc4 denies Black this potentially game saving opportunity (i.e. 23. Rxf5! fxe5 24. Rxe5 Rf7 ). And regardless of the defense Black picks after 24. Bc4!, White will advance his pawns and mop up one or more loose Black pawns with decisive advantage.

For example, Deep Fritz 15 gives White's strongest play and Black's strongest defense as 23. Rxf5! fxe5 24.Bc5 Rxf5 25. Bxe6+ Kf8 26.Bxf5 Rf8 27. Bg6 (diagram below):


click for larger view

Here (diagram above) White's advanced pawns give him a crushing grip on the position, as play might continue 27...a6 28. b6 Nf6 29. Rf7+ Kg8 30. Re7 Kf8 31. e4 h5 32. Kf2 Ng4+ 33. Kg3 Nh6 34. Rxe5 (+10.89 @ 22 depth, Deep Fritz 15).

P.S.: The computer best play line 23. Rxf5! fxe5 24.Bc5 Rxf5 25. Bxe6+ Kf8 26.Bxf5 line, has something in common with yesterday's problem solution 44...Re5! from Eljanov vs Navara, 2015

In both of these games and puzzle positions, allowing the exchange of a Rook to weaken the opponent's position is much stronger than attempting to keep both Rooks on board.

So I suppose when it comes to Rook play, one on one is sometimes a better option than two on two. To use a sports analogy, it's comparable to "isolation plays" in football and basketball where the superior athlete has the advantage in one on one situations.

Sep-09-16
Premium Chessgames Member
  kevin86: Material is about even, but white's mobility is strong and black's weak. Enough to win!
Sep-09-16  stacase: <et1: White's first move is pretty obvious, the rest...not quite at all.>

My thoughts exactly (-:

Sep-09-16
Premium Chessgames Member
  YouRang: Friday 23.?


click for larger view

Well, it seems like lots of people saw 23.Rxf5!, but it didn't jump out at me.

I ended up with the more pedestrian <23.Nc4>, saving my N and freeing my Rd7 from the defense of my nice passed pawn.


click for larger view

Black now has to deal with my threat of Rxb7. Afterwards, I can bolster the pawn with Rd1, move my Rd7 out of the way (Re7 maybe) and start pushing my pawn with assistance from the two rooks and knight. I don't have any specific continuation in mind, but I think black is in for loads of trouble.

~~~~

Checking with the engine, it does appear that 23.Rxd5 is strongest, but 23.Nc4 (and 23.Bc4 for that matter) also look strong enough to be clearly winning.

Sep-09-16  steinitzfan: I think I would have done all right with this puzzle if I could have seen that the sacrificial variation where Black takes the rook instead of the bishop (23...exf5) works out in White's favor. It looks like Black has enough play to organize a defense but he doesn't. However, once Black takes the knight on e5 White seems to just have an overwhelming position at no cost. He can just quietly pick off a couple of pawns.
Sep-09-16  laskereshevsky: find quite fast 22.♖xf5 and if 22...♙exf5 23♘g6.... But after 22...♙fxe5 was lazy (and didnt even noticed the creative) 23.♗c4!.... and stucked on 23.♖xe5 and/or 22.♖xf8+ ....This is a litlle strange for my to understand, cause the move ♗c4 was "seen" by my mind in the analysis of another line, if after ♘g6 black play ♖f7
Sep-09-16
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens fxe5.

White can weaken the light squares around the black castle with 23.Rxf5:

A) 23... exf5 24.Ng6

A.1) 24... Rf7 25.Bc4 wins a piece (25... Kh7 26.Bxf7).

A.2) 24... Rc8 25.Ne7+ and 26.Nxc8 + - [B].

A.3) 24... Nxd6 25.Nxf8 Nxb5 (25... K(R)xf8 26.Rxd6 + - [B vs P]) 26.Ne6 Nxa3 27.Rxg7+ Kh8 28.Rxb7 + - [B vs P].

A.4) 24... Rb8 25.Bc4+ wins a piece (25... Kh7 26.Nxf8+).

B) 23... fxe5 24.Rxf8+ (24.Rxe5 Rc8, threatening Rc1+ and mate, and Black gets some counterplay) 24... Kxf8 25.Bc4

B.1) 25... Rc8 26.Bxe6

B.1.a) 26... Rc1+ only seems to help White to activate the king.

B.1.b) 26... Rc3 27.Rf7+ Kg8 28.Rc7+ wins the rook.

B.2) 25... Nf6 26.Rxb7 Nd5 (26... Re8 27.Rxa7 + - [B+2P vs N]) 27.Bxd5 (apparently simpler than 27.e4 Nf4 -27... Nc3 28.Bxe6 Nxe4 29.Rf7+ wins-) 27.exd5 exd5 28.d7 Ke7 (due to 29.Rxa7 Rxa7 30.d8=Q+) 29.d8=Q+ Kxd8 30.Rxg7 Kc8 31.Rg8+ Kb7 32.Rxa8 Kxa8 33.g4 and the black king cannot stop the white pawns but the white king can stop the d-pawn.

Sep-09-16  drollere: the two features that jump out are the threat f6xe5 and the futility of Re7. the moveable parts are the N (Ng6) or B (Bh5 or Bc4).

i found Bc4 and Rxf5 but in that order, not visualizing that fxe5 opens the file behind the bishop allowing the exchange of R's.

Sep-09-16
Premium Chessgames Member
  thegoodanarchist: Sorry, I am not even an expert, but looking at the position the answer almost has to be 23.Rxf5 to open the diagonal for White's bishop.

There really isn't much else.

The puzzle is off by 1 or 2 days ... should been Wednesday or Thursday.

If I post this and it <ISN'T> 23.Rxf5 I will feel stupid.

Sep-09-16
Premium Chessgames Member
  thegoodanarchist: OK, got it right. Of course I am not stupid. Why did I ever doubt myself??
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