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Joel Lautier vs Jean-Marc Degraeve
French Championship (2005), Chartres FRA, rd 5, Aug-19
King's Indian Defense: Saemisch. Closed Variation 7…c6 (E88)  ·  0-1



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Kibitzer's Corner
Premium Chessgames Member
  patzer2: Black forces a winning passed pawn with 39...Qxh4!

Had Lautier not resigned, play might have continued <39...Qxh4!> 40. gxh4 Rhxh4+ 41. Qh3 Rxh3+ 42. Kxh3 Rxg1 43. Bc2 e3 44. Kh2 Rf1 45. Kg2 e2 .

Sep-05-05  Gargamel: One of my favorite lines with Black. After 12 moves Black gets more active play in middlegame.
Mar-14-08  DarthStapler: Wow, nice combination at the end there
Nov-12-16  dfcx: Why did white take with rook on 39?

With 39.bxc4 white is only down -2.28 (stockfish 8 @22).

While 39.Rxc4 Qxh4+ 40.gxh4 Rhxh4+ 41.Qh3 Rxh3+ 42.Kxh3 Rxg1 is rated at -9.91 by stockfish.

Premium Chessgames Member
  patzer2: For today' Saturday puzzle position, 38...Bxc4 to is best.

However, instead of 39. Rxc4? allowing 39...Qxh4+ (-9.17 @ 22 depth, Deep Fritz 15), Black could have put up much more resistance with 39. bxc4 (-1.26 @ 20 depth, Deep Fritz 15).

A tempting but flawed try is 38... Rxh4+? 39. gxh4 Qxh4+ 40. Kg2 Qh2+ 41. Kf1 Rh3 (diagram below):

click for larger view

Here (diagram above) every White move loses except one. That one move, waiting to be played in the diagram above, is 42. Rc2! (+3.93 @ 20 depth, Deep Fritz 15), which turns the tables on Black and gives the win to White.

P.S.: For an improvement for the first player, instead of losing the advantage of the first move with 39...Ra3 (-0.45 @ 29 depth, Stockfish 7), the computers indicate White could have maintained the advantage with 22. Na4 (+0.41 @ 28 depth, Komodo 10).

Premium Chessgames Member
  drollere: how would play continue from 40. bxc4? in that case white's KR isn't hanging after the forced 42. Kxh3
Premium Chessgames Member
  patzer2: <dfcx> Interesting to see Stockfish 8 calling it a clear win (-2.28 @ 22 depth) for Black after 39. bxc4.

I plugged 39. bxc4 into Deep Fritz 15 for a longer look, and it gave 39...Qb6 40. Qf2 Qf6 (-1.39 @ 26 depth).

Premium Chessgames Member
  al wazir: I didn't get it. But like <dfcx> I wondered why white played 39. Rxc4 instead of taking with the ♙.
Nov-12-16  YouRang: Like a bloodhound, I instinctively sensed that it had to be a kingside attack with my two rooks and queen bearing down. Surely, I use one of them to bust open the defenses, and then finish him off.

For a while, I even imagined that it worked. Bloodhounds actually aren't that good at chess sometimes. :-(

Nov-12-16  AlicesKnight: I (engineless) also fell into the temptation of ....Rgxh4 (shown by <patzer2> to be flawed), not expecting (like others) White to recapture in the game line with the R and give up the mutual protection.
Nov-12-16  gofer: Well, today is simple, white only has one threat Nxd6+ and so, in all likelihood Bxc4 is going to be part of the sequence, if it isn't first, then it is going to be somewhere. After that we see the queen sacrfice sequence; 1 ... Qxh4+ 2 gxh4 Rxh4+ 3 Qh3 Rxh3+ 4 Kxh3 Rxg1 5 Rxg1 and everything fizzles out, but what if we play Bxc4 and white foolishly plays Rxc4?! Suddenly, it all becomes clear. White can't play Rxc4 and has to play bxc4 (at which point we have a very nice pawn on e5 and two more on a5 and b4 all looking very threatening)... ...not a win, but we have a clear advantage...

<38 ... Bxc4>

39 Rxc4 Qxh4+
40 gxh4 Rxh4+
41 Qh3 Rxh3+
42 Kxh3 Rxg1
43 Bc2 e3!

<39 bxc4 ...>

Now at this point do we risk the rook sacrifice or re-group all our pieces onto the queenside?! Now this would be a tough Saturday! Probably too tough! I suppose white walks into the trap and that is why we have this POTD...



I wonder whether the following works?

39 ... a4
40 Bc2 b3
41 axb3 axb3
42 Bxb3 Nxb3
43 Qxb3 Rxh4+
44 gxh4 Qxh4+
45 Kg2 Qxf4!

click for larger view

Nov-12-16  bubuli55: Sharp play by Black.
Nov-12-16  morfishine: Yawn <39.bxc4> is much better leaving the White rooks connected


Nov-12-16  JohnBoy: I rejected 38...Bxc4 because of 39.bc4. But absolutely did not see <patzer2>'s refutation of 38...Rxh4. Damn.
Nov-12-16  RandomVisitor: After 38.Nc4 Bxc4 39.bxc4 black still has some work to do:

click for larger view


<-2.68/42 38...Bxc4 39.bxc4> Qg6 40.Qf2 a4 41.Rce1 b3 42.Rg2 Qf6 43.Re3 Qd4 44.axb3 axb3 45.Qe2 Rhg6 46.Rg1 Rg8 47.Kh3 Qg7 48.Rg2 Rb8 49.Qd2 Kg8 50.Kh2 h6 51.Kh3 Kh7 52.Kh2 Qf6 53.Kh3 Qa1 54.Rg1 Qg7 55.Rg2 Ra8 56.Qd1 Kh8 57.Kh2 Rg8 58.Qd2 Rb8 59.Kh3 Ra8 60.Qb2 Kh7 61.Qxg7+ Kxg7

Premium Chessgames Member
  agb2002: The material is identical.

White threatens Nxd6+ followed by Rxc5 (the white queen must stay on the third rank due to Qxh4+).

The rook sac 38... Rxh4+ 39.gxh4 Qxh5+ doesn't seem to work, so I think I would first eliminate White's threat and try to decoy as many white pieces as possible to the queenside. Therefore, 38... Bxc4:

A) 39.Rxc4 Qxh4+ 40.gxh4 Rhxh4+ 41.Qh3 Rxh3+ 42.Kxh3 Rxg1 - + [N+2P vs B].

B) 39.bxc4 a4 and Black exerts pressure on both sides of the board.

That's all I can do today.

Premium Chessgames Member
  thegoodanarchist: <patzer2: Black forces a winning passed pawn with 39...Qxh4!

Had Lautier not resigned, play might have continued <39...Qxh4!> 40. gxh4 Rhxh4+ 41. Qh3 Rxh3+ 42. Kxh3 Rxg1 43. Bc2 e3 44. Kh2 Rf1 45. Kg2 e2 .>

Or even 43.Bc2 Ra1!? with the idea of ...Rxa2. Seems good to me.

Premium Chessgames Member
  patzer2: <RV> Thanks for the deep 42 depth analysis of 39. bxc4 with Komodo 10.1.

As a correction to my previous post, I meant to write <I plugged Deep Fritz 15 in for a longer look, and it gave 39...Qg6 (not 39...Qb6) 40. Qf2 Qf6.>

P.S.: In your Deep Komodo 10.1 analysis, I was puzzled by 60. Qb2 offering to exchange Queens in an inferior position. Instead, 60. Kh2 seems to put up more resistance.

Nov-12-16  RandomVisitor: <patzer2>I wouldn't give too much thought to moves far out in the predicted variation, such as 60.Qb2. The computer algorithm apparently involves a very shallow look later in the line - it is called late move reduction - and for some reason it improves performance so all the engines use it.

Komodo also does a "quick look" when there are multiple good moves at a certain point for one side - no need to spend much time looking at any of them, if one is refuted you can then play one of the others.

click for larger view


<-2.68/43 38. ... Bxc4 39.bxc4 Qg6 40.Qf2 a4> 41.Rg2 b3 42.axb3 axb3 43.Rc3 Qg7 44.Re3 Qd4 45.Qe2 Rhg6 46.Rg1 Qf6 47.Rd1 h5 48.Kh3 Rg8 49.Rd2 Qg7 50.Qe1 Ra8 51.Qe2 Rb8 52.Qd1 Qa1 53.Qc1 Qf6 54.Qa3 Kg6 55.Qc1 Rb4 56.Qf1 Ra4 57.Qe2 Kf7 58.Kh2 Kg8 59.Kh1 Kh7 60.Kh2 Rb4 61.Kh3

Premium Chessgames Member
  kevin86: the new passed pawn wins it 4 black.
Nov-12-16  RandomVisitor: Nicholas Rescher, Complexity (1998):

"the more complex something is the more difficulty we have in coming to grips with it and the greater the effort that must be expended for its cognitive and/or manipulative control and management."

"Complexity is first and foremost a matter of the number and variety of an item's constituent elements and of the elaborateness of their interrelational structure... Any sort of system or process - anything that is a structured whole consisting of interrelated parts - will be to some extent complex."

Pretty much sums up Saturday/Sunday puzzles. A complex position is presented which requires a great deal of thinking to unravel best play.

Nov-12-16  mel gibson: DR4 64 bit doesn't take the Bishop
with the Rook it takes with pawn on move 39.

39. bxc4 (b3xc4 a5-a4 ♕e3-f2 b4-b3 a2xb3 a4xb3 ♖c1-c3 ♖g4-g8 ♕f2-e3 ♕h5-g4 ♕e3-f2 ♖g8-g7 ♖c3-e3 ♔f7-g8 ♖g1-h1 ♖g7-f7 ♕f2-d2 ♖f7-a7 ♔h2-g2 ♖a7-a8 ♖e3-c3 ♖h6-g6 h4-h5)
The score is only +1.29/21 213)

But when White makes the mistake of
39 Rx B the score is +8.28

39. .. Qxh4+ (39. .. Qxh4+
(♕h5xh4+ g3xh4 ♖h6xh4+ ♕e3-h3 ♖h4xh3+ ♔h2xh3 ♖g4xg1 ♗b1xe4 f5xe4 ♔h3-h2 ♖g1-a1 ♖c4-c2 ♔f7-g6 ♔h2-g3 ♖a1-f1 ♔g3-h3 ♔g6-f5 ♔h3-g2 ♖f1xf4 ♖c2-e2 ♖f4-f3 ♔g2-h2 ♔f5-e5 ♔h2-g2 ♘c5-d3 ♔g2-g1 e4-e3 ♖e2-h2 ♔e5xd5) +8.28/18 25) 0-1

Nov-12-16  wtpy: I don't like puzzles that depend on a less than optimum defense. Like many other posters I saw that white couldn't recapture with the rook on c4 and did not see anything approaching a clear win, so looked again at the Rh4 line, but didn't see Patzer2's saving resource, which was quite clever.
Nov-12-16  YouRang: <RandomVisitor: Nicholas Rescher, Complexity (1998): >

Complexity explains why chess is a much more interesting game than tic-tac-toe. :-)

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