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Mikhailo Oleksienko vs Mikhail Vladimirovich Golubev
3rd Geller Mem Open-A, Odessa (2007), ?, rd 3, Sep-10
Sicilian Defense: Dragon. Classical Variation (B72)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-11-14  jhoro: Nice to see <GM Golubev> commenting on his own game at the very top.

I got the first 2 moves, but then went for the Queen exchange and doubling the rooks.


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It turned out this ending is hard to win. Much better to keep the Queens as demonstrated by GM Golubev

Dec-11-14  jhoro: Looking with an engine white could have exchanged the Queens on move 40.Qxa8


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Dec-11-14  M.Hassan: "Medium"
Black to play 38...?
Equal forces

I thought it is reasonable to eliminate one of the supporters of f6:

38...........g5
39.Bg3 Rxf6
<if 40.Rxf6 Rd1+ 41.Rf1 Rxf1#>

40.Rcf3 Rxf3
41.Qxf3 Qxf3+
42.Rxf3 Rd4
White's c pawn will fall as well:
If <43.Rc3 Rd1+
44.Kg2 Bxc3>

43.Bf2 Rxc4
Black will have two extra pawns and wins.

Dec-11-14
Premium Chessgames Member
  gofer: Well, the discovered check nearly works <38 ... Rd2>, but with black a bishop down and both queens on the board I think its a bad choice. Likewise with <38 ... g5?> which loses two pawns, swaps off bishops and seems very unclear.

So today I am going to play a very conservative move.

<38 ... Ra6>

This virtually forces the exchange of queens and so puts pressure on white to hold on to both Pa3 and Pf6. A small victory perhaps but better that the swash-bucklingly stuff that seems to gain even less...

~~~

Hmmm, okay I think we need some silicon.

Is this...


click for larger view

... so much better than this???


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Dec-11-14  TheBish: M Oleksienko vs M Golubev, 2007

Black to play (38...?) "Medium", even material.

Black's bishop is horrible, hemmed in by the f6 pawn. But he can get rid of that pawn and simplify to a winning endgame:

38...Bxf6! 39. Bxf6

Or 39. Rxf6? Rd1+ 40. Rf1 Rxf1+ 41. Qxf1 Rf6+ 42. Rf3 (42. Qg2 Rf1#) Qxf3+ 43. Qxf3 Rxf3, and Black has won the Exchange.

39...Rxf6 40. Qxa8

But not 40. Rxf6?? Rd1+ 41. Rf1 Rxf1#.

40...Rxf1+ 41. Kg2 Rxa8 42. Kxf1 f5 and Black should win the endgame.

Dec-11-14
Premium Chessgames Member
  gofer: <M.Hassan: 38 ... g5>

White simply takes it!

39 Bxg5 hxg5
40 Qxg5+ Kf8
41 Qh6+ Ke8
42 Qxh8+ Kd7
43 Qh3+ Re6+


click for larger view

Not sure whose winning here, but black has definitely lost 2 pawns by playing 38 ... g5

Dec-11-14
Premium Chessgames Member
  agb2002: The material is identical.

The white bishop and the rook on c3 are defenseless. The black queen can pin her white colleague leaving the rook on f1 also defenseless and White's back rank weak. These details invite to play 38... Bxf6, winning momentarily a pawn and forking the white bishop and the rook on c3:

A) 39.Bxf6 Rxf6

A.1) 40.Rxf6 Rd1+ 41.Rf1 Rxf1#.

A.2) 40.Qxa8 Rxf1+ 41.Kg2 Rxa8 with an extra pawn and the better ending.

A.3) 40.Re1 Qxg2+ 41.Kxg2 Rd2+ with the same conclusion as A.2.

A.4) 40.Rcf3 Rxf3 41.Qxf3 (41.Rxf3 Rd1+ wins) 41... Qxf3+ 42.Rxf3 Rd2 with the same conclusion as A.2.

B) 39.Rh3 Bxh4 40.Rxh4 Rf6 41.Qxa8 Rxf1+ 42.Kg2 Rxa8 43.Kxf1 Kg7 44.Rh3 Ra4 45.Rc3 f5, again with the same conclusion as A.2.

C) 39.Rxf6 Rd8+ 40.Rf1 Rxf1+ 41.Qxf1 Rf6+ wins (42.Qg2 Rf1#).

-----

Another option is 38... Rd2 but White can play 39.Qf3 and if 39.Qxd2 Rxf6+ 40.Kg1 Rxf1+ 41.Kxf1 Bxc3 42.Qxc3 Qh1+ 43.Ke2 Qe4+ (43... Qxh2 44.Bf2) 44.Qe3 Qxh4 45.Qxc5 with a complex ending.

-----

I think I'd play 38... Bxf6.

Dec-11-14
Premium Chessgames Member
  Once: This is a nice little fixer-upper.

Straight out of the box, the move that we would like to play is 38...Rxf6 dreaming of 39. Rxf6 Rd1+


click for larger view

White's back rank is terminally weak. His queen is pinned and he only has a couple of useless interpolations.

Or we might settle for second best with 39. Qxa8 Rxf1+ and we're winning lots of material.

So far so peachy. But there's a problem with the immediate 38...Rxf6. And that problem is 39. Bxf6. This keeps the white rook on f1 and stops all the back rank tricks. We're just losing a rook.

But the lure of Rxf6 is strong. If we can somehow fix it up it might yet do something. So we play the A-team music, get ourselves conveniently locked up in a workshop full of tools and start welding. What does 38...Bxf6 do?


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White's rook and bishop are both attacked. He only has two sensible moves: 39. Bxf6 and 39. Rh3

39. Rh3 simply allows black to emerge a pawn up with either g5 or Bh4 or Qa6. 39. Bxf6 (as played in the game) allows us to play our patented 39...Rxf6 move:


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Now Rxf6 loses to a forced mate as we have already seen. So white either has to allow a mass exchange or wimp out with something like 40. Ra1. In either case, black emerges a safe pawn up. White's weak pawns will be tortured by the black heavy pieces - a grisly endgame.

Dec-11-14  Alphastar: Actually 38. ...Rd2!? also is good, wins at least a pawn, see: 39. Qxd2 Rxf6+ and now:

A) 40. Qd5!? (just immediately giving the rook back, trying to escape in a pawn down ending) Rxf1+ 41. Kg2 Qxd5 42. cxd5 Bxc3 43. Kxf1 and we have a bishop ending, black being a sound pawn up.

B) 40. Kg1 Rxf1+ 41. Kxf1 Qh1+ 42. Ke2 Bxc3 43. Qxc3 Qe4+! wins the bishop on h4 back, leading to a queen endgame with extra pawn for black.

Dec-11-14
Premium Chessgames Member
  morfishine: Fiddled around with 38...Rd2, 38...Rxf6, 38...Bxf6 & 38...g5 without finding a winning shot.

Nice tactic, Nice positional puzzle

*****

Dec-11-14
Premium Chessgames Member
  Penguincw: After starting the week 3/3, I "failed" to solve this puzzle.
Dec-11-14
Premium Chessgames Member
  patzer2: Looked at the Thursday (38...?) puzzle just after Wednesday midnight, and with the hour being late and my mind preoccupied with a work problem I mistakenly thought it was White to move.

The amazing thing after analyzing the position from the wrong side is that even with White to move Black still appears to win.

As to the actual puzzle (38...?) with Black to move, there's at least two solutions.

The first solution is the fairly obvious 38...Bxf6! 39. Bxf6 Rxf6! .

The second solution is <Alphastar's> 38...Rd2! 39. Qxd2 Rxf6+ 40. Qd5 Rxf1+ 41. Kg2 (diagram below)


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Here Fritz 12 finds 41...Qa4! (-1.89 @ 23 depth) which improves over 41...Qxd5 (-0.89 @ 23 depth).

Dec-11-14  TheaN: Thursday 11 December 2014 <38....?>

The starting position can be considered an epitome of pins and discovered attacks.

In a quick summary, Pf6 is pinned by Bh8 on Rc3 but allows a discovered check with Bh4 on Rd8. On the long diagonal, Rc6 in pinned by Qg2 on Qa8, but incidentally threatens discovered attacks due to the same pieces. Only Rf1 seems to not play a part in this scheme of diagonal violence.

As such, finding a 'puzzle move' is extremely tricky, as inbetween moves are all over the board if either color tries something.

After failed to make Rxf6, Rd2 and g5 work due to Bxf6, Qe4 and Bxg5, I found that the capture on f6 <38....Bxf6> allows black to simplify to an endgame with a pawn up, and white paralyzed.

After <39.Bxf6 Rxf6!>, to which white has no reasonable alternative, capturing on a8 allows a comfortable endgame for black. Note that 40.Rxf6? Rd1+ is mate. <40.Qxa8 Rxf1+ 41.Kg2 Rxa8 42.Kxf1 > given that white cannot do anything with his rook or he will lose a3 and/or c4. The passed f-pawn will win black the game.

Dec-11-14  TheaN: Interesting to see the discussion going about which endgame for black is stronger. I do believe that with the fewer pieces on the board that have a significant difference in activity (after the main line with white Rc3 and black Ra8) it seems easier to win. White will have to move his king all the way to the queenside to help out his rook, where black can freely play up his pawns. Also, it avoids any potential tactical mishaps on black's side.
Dec-11-14  chinokoli: My moves are
38 ... Rd2
39. Qxd2 Rxf6+ (39. Rf2?? Rd1+ 40. Rf1 Rxf1 41. Qxf1 Rxf6+ ...and the white Queen should fall) 40. Kg1 Rxf1+
41. Kxf1 Bxc3
42. Qxc3 Qh1+
43. Ke2 Qe4+ (43. Kf2 Qxh2+ 44. Kf1 Qxh4... and black is two pawns up) 44. Kd1 Qxh4
Black is a pawn up and has the dynamic advantage so should win easily
Dec-11-14  chinokoli: Actually 39. Qf3! should be fine for black as the Queen is now protected twice.
Dec-11-14  Chess Dad: I'm kind of bummed that I missed my chance to go 4/4 for the week because I couldn't see that 40. Rxf6 allowed a forced mate.

I looked at 38... Bxf6 39. Bxf6 Rxf6 and then dismissed the line thinking I'd be down a rook after 40. Rxf6.

But even so, if white trades off queens with 40. Qxa8, it's not as good for black as the game line.

Dec-11-14
Premium Chessgames Member
  diagonalley: <lost in space> ... after a lot of faffing around, i got as far as your first post... advantage black, but hardly a conclusive position.
Dec-11-14
Premium Chessgames Member
  kevin86: The queen exchange clinches it: white is down two pawns.
Dec-11-14
Premium Chessgames Member
  CHESSTTCAMPS: Material is even, but black's bishop appears to be a prisoner of white's twice-protected f-pawn. On second glance, it is evident that black has tactical opportunities on the open h1-diagonal. Three candidates occurred to me: Rxf6, Rd2 and Bxf6

I 38... Rxf6(??) 39.Rxf6(??) (or Qxa8?? Rxf1+ wins) Rd1+ forces mate. However 39.Bxf6 Bxf6 40.Qxa8 wins for white.

II 38... Rd2 39.Qxd2 Rxf6+ 40.Kg1 (both 40.Qg2?? Rxf1# and 40.Qd5? Rxf1+ 41.Kg2 Qxd5 42.dxe5 Bxc3 are much worse for white) 40... Rxf1+ 41.Kxf1 Bxc3 42.Qxc3 Qh1+ 43.Ke2 Qe4+ 44.Qe3 Qxh4 45.Qe8+ Kg7 46.Qe5+ Qf6 47.Qxc5 leaves a difficult Q&P ending where white may be better because of the more advanced pawn.

III 38... Bxf6! looks simplest and best: 39.Bxf6 (Rxf6? Rd1+ 40.Rf1 Rxf1+ 41.Qxf1 Rf6+ wins) Rxf6 40.Qxa8 (Rxf6+?? Rd1+ 41.Rf1 Rxf1#) Rxf1+ 41.Kg2 Rxa8 42.Kxf1 f5 and the connected king-side pawns should win the rook and pawn ending.

Dec-11-14
Premium Chessgames Member
  CHESSTTCAMPS: A nice, tactically rich Thursday puzzle.
Dec-11-14
Premium Chessgames Member
  chrisowen: Dint i f6 any glass ceiling a8 wax glib

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Dec-11-14  dfcx: 38...? black to move.
White's queen can be pinned when black moves the rook away. 38... Bxg6 wins a pawn.
39.Bxf6 Rxf6
40.Qxa8 Rxf1+
41.Kg2 Rxa8
Dec-11-14
Premium Chessgames Member
  Nf3em: I saw 38... Rd2 39.Qxd2 Rxf6 40.Kf1 (not 40.Qg2?? as Rxf1+#) Rxf1+ 41.Kxf1 Bxc3 42.Qxc3 Qh1+ 43.Ke2 Qxh2+


click for larger view

after a White King move 44... Qxh4 follows and I think Black is winning in that position ... I'm not sure though but in OTB I would surely consider playing this line and think deeper after 44... Qxh4

;-)

Dec-12-14  Alphastar: <Nf3em> I think in that line the pawn on h4 is actually a white bishop and he can then play Bf2, keeping a piece against 2 pawns.
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