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Romain Edouard vs Daniele Vocaturo
Sunway Sitges Open (2016), Sitges ESP, rd 8, Dec-22
Queen's Gambit Declined: Ragozin Defense (D38)  ·  1-0



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Kibitzer's Corner
Jul-07-18  ChessHigherCat: How about this, with the threat of Qd4+ useless queen interposition and mate?

34. c6 bxc6 35. Bxa6 Nb8 36. Bb7+ Ka7 37. Qc3 c5 38. dxc5 Qe7 39. c6

Jul-07-18  ChessHigherCat: I diverged from the game line with 36. Bb7# instead of Rb6, but StorkFlesh rates my line as clearly better than the game line (+5.00 vs. +4.32).

Here endeth my horn tooting.

Just like to add that maybe I had a blind spot yesterday but this one struck me as infinitely easier.

Premium Chessgames Member
  al wazir: I got the first two moves, but not the remaining ten. What's that worth?
Jul-07-18  ChessHigherCat: I found an improvement. The problem with 39. c6 is that it allows black to trade with queens with Qe2+ 40. Kg1 Qe3+:

click for larger view

39. Bxd5 is much better:

click for larger view

Now black can't trade queens without losing the knight at the end of the combo.

Jul-07-18  Walter Glattke: 41.-h3 seems better than 41.-Rce7
Jul-07-18  messachess: Difficult but not unreasonably so.
Jul-07-18  Mayankk: Didn’t see the Nb8 defence but 34 c6 jumps at you. bxc6 is basically forced and Black seems significantly worse after Bxa6. The pawn cover around the King has gone, there are 3 pieces breathing down his neck and Queen can always join. At the same time Black has no counter-threat at all.

So the idea seems natural and easy to spot and something you will play in a real game even if you do not know what defence Black may try after Bxa6.

Jul-07-18  leRevenant: <al wazir: I got the first two moves, but not the remaining ten. What's that worth?> A sixth of a point, twice as much as I got.
Jul-07-18  thegoodanarchist: Lettuce learn from Romain's play.
Jul-07-18  Walter Glattke: White wins after 41.-h3 42.g3 (draw after 42.Qc5 Qh4+ 43.Kg1 Re1+ perpetual) Qe7 43.Qd3 h2 44.Ra6+ Nxa6 45.Qxa6+ Kb8 Qa8# or 42.-h2 43.Qc5 Nd7 44.Ra6++ Kb8 45.Ra8# or 43.-h1N+ 44.Rxh1 Qxh1 45.Ra1# or 43.-h1Q 44.R6a2# / 43.-Re2+ 44.Kxe2 Qe7+ 45.Qxe7 Rxe7+ 46.Kf2 h1Q 47.Rxh1 Rxb7 48.Rxb7+ Kxb7 49.Rh6 wins, close Victory.
Jul-07-18  mel gibson: I wasn't sure.

Stockfish 9 agrees only with the first move:

34. c6

(34. c6 (c5-c6 ♖c7xc6 ♕d2-b2 ♕f7-e6 ♖b4xb7 ♕e6-e3+ ♔f2-f1 ♕e3xd3+ ♔f1-g1 ♕d3xb1+ ♕b2xb1 ♖e8-e1+ ♕b1xe1 ♔a8xb7 ♕e1-e8 ♖c6-c1+ ♔g1-h2 ♔b7-c7 ♕e8xh5 ♖c1-c4 f3-f4 g5xf4 ♕h5xd5 f4xg3+ ♔h2xg3 ♖c4-c6 ♔g3-f4 ♖c6-d6 ♕d5-c4+ ♖d6-c6 ♕c4-b3 ♖c6-d6 ♕b3-c3+ ♔c7-d8 ♕c3-c4 ♘d7-f8 ♔f4-f5 ♔d8-e7 ♕c4-c7+ ♘f8-d7 ♕c7-b7 ♔e7-f7 ♕b7-b3+ ♔f7-f8 ♕b3-c4 ♔f8-e7 ♕c4-g8 ♖d6-c6 ♕g8-g7+ ♔e7-d8 ♕g7-h8+ ♔d8-e7 ♕h8-h7+ ♔e7-e8 ♕h7-g6+ ♔e8-e7 ♕g6-g8 ♖c6-d6 g2-g4 ♖d6-c6 ♕g8-g7+ ♔e7-d6 ♕g7-h6) +4.17/43 187)

score for White +4.17 depth 43.

But following the actual game move by Black to take the pawn with its pawn:

34. c6 bxc6

35. Bxa6 (35. Bxa6 (♗d3xa6 h5-h4 ♗a6-b7+ ♔a8-a7 ♕d2-d3 h4xg3+ ♔f2xg3 ♘d7-b8 ♖b4-b6 ♖c7xb7 ♖b6xb7+ ♕f7xb7 ♖b1xb7+ ♔a7xb7 ♕d3-g6 ♖e8-e3 ♕g6xf6 ♔b7-c8 ♕f6xg5 ♖e3-a3 ♕g5-e7 ♖a3xa5 f3-f4 ♘b8-d7 ♕e7-d6 c6-c5 d4xc5 ♖a5xc5 f4-f5 ♔c8-d8 ♔g3-h4 ♖c5-c1 g2-g4 ♖c1-h1+ ♔h4-g5 ♖h1-b1 ♕d6xd5 ♔d8-c8 f5-f6 ♖b1-b6 f6-f7 ♔c8-c7 f7-f8♕ ♘d7xf8 ♕d5-c5+ ♔c7-b7 ♕c5xf8 ♔b7-c6) +6.67/35 111)

score for White +6.67 depth 35

Jul-07-18  morfishine: <thegoodanarchist: Lettuce learn from Romain's play> Nice one! You really Caesar'd the initiative with that one!
Jul-07-18  tal fan: My line is 34.Rb6 Nb6 35.ab Rc6 36.Ra1 Kb8 37.Bb5 SF 9 scores it for +1.2 Not so bad)
Premium Chessgames Member
  agb2002: White has a bishop for a knight.

White has a number of options: Qc2 (aiming at the diagonal e8-h5), c6 (to weaken the black castle), Qb2 (to increase the pressure along the b-file), Rb6 (aiming at a6), Bxa6 (weakening the black castle), etc.

In the case of 34.Rb6 after for example 34... Nxb6 35.axb6 Rce7 36.Qa5 Qe6 37.Bb5 (37.Bxa6 bxa6 38.Qxa6+ Kb8 39.Ra1 Qe2+ wins for Black) followed by c6 leads to think that 34.c6 directly might be the simplest option.

For example, 34.c6 bxc6 35.Bxa6 Nb8 36.Bb7+ Ka7 37.Rb6 followed by Qd3 looks winning.

Jul-07-18  saturn2: I had move 34 and 35 weakening the black king but it is more a stratetic than a tactical puzzle.
Jul-07-18  cormier: Analysis by Houdini 4: d 24 dpa done

<1. - / + (-1.11): 19...h4> 20.gxh4 gxh4 21.Ng1 h3 22.gxh3 Rde8 23.b5 cxb5 24.Bxb5 Re7 25.Bd3 Rc7 26.Qb3 Nc4 27.Ngf3 a5 28.Ke2 Bb4 29.Qa2 Qh6 30.Rhg1 Nxd2 31.Nxd2 Qxh3 32.Nf3 Bf5 33.Qxd5 Bxd3+ 34.Kxd3 Rc3+ 35.Ke4 Re8+ 36.Kf4 Qh6+ 37.Kg4 Qg6+ 38.Ng5 f6 39.Qf5 Qxf5+ 40.Kxf5 fxg5 41.Kxg5

Jul-07-18  cormier: Analysis by Houdini 4: d 22 dpa done

<1. = (0.18): 26...Nf8> 27.Nc3 Rc7 28.N3e4 Bd5 29.Re1 Bxe4 30.Qxe4 Qxe4 31.Rxe4 Bxg3 32.Re8+ Rc8 33.Rxc8+ Kxc8 34.a6 bxa6 35.Bf5+ Kc7 36.Ke2 h4 37.Ra1 Bd6 38.Nxa6+ Kb7 39.Nc5+ Bxc5 40.bxc5 Rg8 41.Ke3 a6 42.Rb1+ Kc7

Jul-07-18  Andrew Chapman: Didn't Black turn down the opportunity to repeat moves with 38 Ka7?
Jul-07-18  ChessHigherCat: <Andrew Chapman> I don't think black can repeat moves here:

(+5.44) 38...Ka7 39. Bb7 h4 40. Qb4 hxg3+ 41. Kxg3 Qh7 42. Kf2 f5 43. Ra6+ Nxa6 44. Qb6+ Kb8 45. Bxc6+ Rb7 46. Qxb7+ Qxb7 47. Rxb7+ Kc8 48. Rb6

Leading to this position:

click for larger view

Here SF suggests 48...Rh8, suggesting that the knight is a goner, presumably because if 48...Nc7 49. a6

Jul-07-18  ChessHigherCat: Whoops, if either 48. Nb8? or Nc7 black simply plays Bxe8.
Jul-07-18  morfishine: Nice tactics from both sides
Premium Chessgames Member
  al wazir: <ChessHigherCat>: After 36. Bb7+ Ka7 37. Qc3 c5 38. dxc5 Qe7 39.Bxd5 Qxc5+ 40. Qxc5+ Rxc5 41. Rb7+ Ka6 42. R1b6+ (42. Rxb8 Rxb8 43. Rxb8 Rxd5) Kxa5 43. Rb2 Ka7 44. Ra2+ Ra6, it looks pretty even.
Jul-09-18  ChessHigherCat: <al wazir> I beg to differ:

[36. Bb7+ Ka7 37. Qc3 c5 38. dxc5 Qe7 39.Bxd5 Qxc5+ 40. Qxc5+ Rxc5 41. Rb7+ Ka6 42. R1b6+ 41.Rb7+ Ka6 42.R1b6+ Kxa5]

43.Rb1 Ka6 (Ka7 isn't possible) 44.Be4 (threatening Bd3+) Rxe4 45.Rxb8 Re7 46.Ra1+ Ra5 47.Ra8+ wins a rook

Jul-09-18  ChessHigherCat: Here's the position after 47. Ra8+

click for larger view

Premium Chessgames Member
  al wazir: <ChessHigherCat: 36. Bb7+ Ka7 37. Qc3 c5 38. dxc5 Qe7 39.Bxd5 Qxc5+ 40. Qxc5+ Rxc5 41. Rb7+ Ka6 42. R1b6+ 41.Rb7+ Ka6 42.R1b6+ Kxa5 43. Rb1>

Yes, that wins. Thanks.

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