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Surya Shekhar Ganguly vs Anton Filippov
World Cup (2009), Khanty-Mansiysk RUS, rd 1, Nov-21
Nimzo-Indian Defense: Kmoch Variation (E20)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Feb-11-19  saturn2: White is a piece up. With

38 Rxe5 fxe5 39 Bxe5

he wins another pawn and clears off two pairs of pieces.

Feb-11-19
Premium Chessgames Member
  ChessHigherCat: The idea of Qxc4 in my line is to get the LSB into play:


click for larger view

It's +9.87 but no quick mate either.

Feb-11-19
Premium Chessgames Member
  agb2002: White has the bishop pair for a knight and two pawns.

The bishop on c3 allows 38.Rxe5 fxe5 39.Bxe5+ Kh7 40.Bxd6 cxd6 41.Qxc4 and White ends up a bishop ahead.

Feb-11-19
Premium Chessgames Member
  al wazir: After 39...Kh7 40. Bxd6, white has a won end game.

This is not what I call "very easy.."

Feb-11-19  lost in space: <<jith1207:> <lost in space>: I thought Rdg6 after Qe4+ will let rook off the hook.>

my line is not forced (untypical for Monday), so there are sidelines...

40. Qe4+ Rdg6 41. Rf7+ Kh6
(41...R8g7 42. Rxg7 and Black can not take back)

42. Bf4+ and again the queen is lost


click for larger view

Feb-11-19
Premium Chessgames Member
  ChessHigherCat: When is atypical Monday not a typical Monday?
Feb-11-19  landshark: I chose the game continuation - and what I visualized from where Black resigned was 39...Kh7 40. Qe4+ Qg6 41. Rf7+ Kh6 42. Bf4+ Kh5 - at which point I saw 43.Rh7+ which does force ...QxR at which point 44. QxQ should be sufficient - but I missed the stronger 43. Rf5+ which mates. Ahh - the powers of visualization - !!
This was unexpectedly complex (and interesting) for Monday -
Feb-11-19  Amarande: I'm seeing 38 Qxf6+ Rxf6 39 Rxf6 Re8 (otherwise the Knight is lost, as Nf3+ or Ng6 allows it to be taken with discovered check while any other square allows mate on the move by double check Rh6) 40 Rf8+ Rxf8 41 Rxe5 which looks like it is probably winning?

Black can't hang onto his Queen because of discovered checks, so might as well give it back and get the Rook behind the passed pawns (41 ... Qxe5 42 Bxe5+ Kg8 43 Bxc7 Rc8) but even that doesn't look like it's going to help much.

Feb-11-19  landshark: <lost in space> In your line not only is the Q lost, so is the K - 40. Qe4+ Rdg6 41. Rf7+ Kh6 42. Bf4+ Qg5 43. hxg5+ Kh5 44. Qf3+ Kh4 45. Qh3#
Feb-11-19  lost in space: <<ChessHigherCat>: When is atypical Monday not a typical Monday?>

Today

Feb-11-19  newzild: I went for the same line as <ChessHigherCat>:

38. Rxe5 fxe5
39. Bxe5+ Kh7
40. Bxd6 cxd6
41. Qxc4

White has an extra bishop with an ongoing attack, and Black's pawns are shattered.

It's an interesting exercise to hunt for a mate, but the above line is clear and winning.

Feb-11-19  lost in space: <<landshark:> <lost in space> In your line not only is the Q lost, so is the K - 40. Qe4+ Rdg6 41. Rf7+ Kh6 42. Bf4+ Qg5 43. hxg5+ Kh5 44. Qf3+ Kh4 45. Qh3#>

Very good! And even 42. Bf4+ Qg5 43. Bxg5+ Rxg5 44. Qh7# is an additional option.

Feb-11-19
Premium Chessgames Member
  OrangeTulip: Easy peasy monday.
The long diagonal of the bishop has to be used
Feb-11-19
Premium Chessgames Member
  drollere: Rxe5 was easy to find. another way to lose ...
38. Rxe5 fxe5
39. Bxe5+ Kh7
40. Qe4+ Rdg6 (attempting to save the R)
41. Rf7+ Kh6
42. Bf4+ Rg5
43. Qh7#

and another

38. Rxe5 fxe5
39. Bxe5+ Kh7
40. Qe4+ Qg6 (blocking with the Q)
41. Rf7+ Kh6
42. Qf4+ Kh5
43. Rf5+ Qg5
44. Rxg5+ Kh6
45. Rxg8+ etc.

Feb-11-19  cocker: Far too much play for a Monday
Feb-11-19  Cheapo by the Dozen: Qxf6 also works, but that's REALLY not a Monday puzzle kind of approach.
Feb-11-19
Premium Chessgames Member
  ajk68: Weird glitch with the stockfish engine. From the final position it thinks it's a mate in 13. Make the first move in the sequence, and it then thinks it's mate in 17.
Feb-11-19  malt: Went for
38.R:e5 fe5 39.B:e5+ Kh7 40.B:d6 cd6
41.Q:c4
Feb-11-19  zb2cr: 38. Rxe5, fxe5; 39.Bxe5+, Kh7; 40. Bxd6, cxd6; 41. Qxc4 leads to a simplified position with Black having no compensation for the Bishop minus. It's a straightforward endgame win.
Feb-11-19  schachfuchs: I only got 38.Rxe5 fxe5 39.Bxe5+ Kh7 40.Qe4+ and missed the

mate-in-13 (27 ply) 40...Kh6 41.Bf4+ Kg7 42.Qe7+ Kh8 43.Be5+ Qxe5 44.Qxe5+ Rg7 45.Rf8+ Kh7 46.Qh5+ Rh6 47.Qe8 Rxg2+ 48.Bxg2 Rxh4 49.Qf7+ Kh6 50.Rh8+ Kg5 51.Rg8+ Kh6 52.Qg6#

Feb-11-19  TheaN: Monday 11 February 2019

<38.?>

Bit weird on a Monday to 'settle' for a winning position rather than calculating everything. After <35.Rxe5 fxe5> no real alternatives because the Queen's en prise as well <36.Bxe5+ +-> White has plentora of ways to continue, the main one being BxR.

I do think 36....Kh7 (throwing any rooks now seems pointless) 37.Qe4+ is best:

A) 37....Rdg6 38.Rf7+ Kh6 (Rg7 39.Rxg7+ +-) 39.Bf4+ Qg5 (Rg5 40.Rh7#) 40.Bxg5+ Kh5 (Rxg5 41.Rh7#) 41.Qf3#

B) 37....Qg6 actually follows the same concept as A: 38.Rf7+ Kh6 (Rg7 39.Rxg7+ +-) 39.Bf4+ Kh5 (Qg5 40.Rh7#) 40.Rf5+ Kh4 (lets not discuss Qg5) 41.Bxd6+ Qg4 42.g3#

C) 37....Rgg6 can be a bit tricky as g8 is now an escape square. Rf7+ mates, but a bit complicated. Faster is 38.Rf8! #8

D) 37....Kh6 38.Bf4+ Kg7 (interposing on g5 same as A/B) 39.Qe7+ Kg6 (Qf7 40.Bh6+ +- ouch, Kh8 40.Be5+ +-) 40.Bxd6!

And when the dust settled, <then> we hit on d6 :>. But yeah all of the above is more Thursday level.

Feb-11-19
Premium Chessgames Member
  patzer2: For today's Monday (38. ?) puzzle, I found the game continuation 38. Rxe5 fxe5 39. Bxe5+ +- (mate-in-12, Stockfish 10) easy enough.

That is the best solution, and perhaps it's the easiest for a human to calculate. However, it's not the only solution. The second best solution is the surprisingly strong 38. Bxd3! +- (+13.06 @ 30 ply, Stockfish 10). Also winning is the simple and straight forward 38. Bxe5 fxe5 39. Rxe5 +- (+12.87 @ 29 ply, Stockfish 10).

P.S.: Black's game is practically lost after taking a poisoned pawn with 13...Bxd2?, allowing 14. Ra2! Bd4 15. Nxd4 exd4 16. e5 +- (+1.51 @ 29 ply, Stockfish 10) which wins the pinned Knight.

Instead, 13...h6 14. Nxd4 ± (+0.71 @ 34 ply, Stockfish 10) or 13...h6 14. Bh4 ± (+0.81 @ 34 ply, Stockfish 10) might have improved Black's survival chances.

Early in the opening, instead of 5...Be7, I prefer the popular move 5...Bxc6 = to ⩲. According to our Opening Explorer, even though Black's results are about the same with either move, Masters prefer 5...Bxc6 almost five to one over 5...Be7.

Feb-11-19  cormier: 5...Bxc3 =
Feb-11-19  pdxjjb: As <patzer2> says, it was all downhill after the poisoned pawn on move 13. But what could Filippov, a very capable player, have been thinking when he castled with his knight en prise? (16... Nxe5 17. Re2 Qd6 18. c5 O-O-O 19. cxd6 Nxf3+ 20. gxf3 Rxd6 is much better for black.)
Feb-12-19  Nullifidian: This was a very difficult puzzle for a Monday because White only appears to solidify an already existing piece advantage by taking the rook. It takes a couple of pieces off the board and limits black's counterplay, but I wouldn't call that much of an advantage. So I looked for something better.

After 38. ♖xe5 ♙fxe5 39. ♗xe5+ ♔h7, the correct continuation is 40. ♕e4+ ♔h6 41. ♗f4+ ♔g7 42. ♕e7+ ♔h8 (♔g6 43. ♗e3 Δ ♕f7# mates in 5) 43. ♗e5+ forces Qxe5 followed by 44. ♕xe5. That's a lot of calculation for a Monday puzzle.

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