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Pedro Cherta Clos vs Carlos Enrique Guimard
Barcelona (1946), Barcelona ESP, Nov-??
Dutch Defense: Classical. Stonewall Variation (A95)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 3 ·  Later Kibitzing>
Sep-08-10  midi900: 41...g5!, threatening mate and if white captures black checks with the bishop and mates next.
Sep-08-10
Premium Chessgames Member
  OBIT: It seems to me Black is forced to make the winning move. He has to stop Qxg7#, and the only reasonable move is 41...g5. Oh, but how nice - 41...g5 also creates a mating threat, so that 42. Bxd5 is met by 42...Qh4#, and if 42. fg Bxe4 43. g7+ Kg8 and wins.
Sep-08-10  zooter: It took me a bit to see this, but 41...g5 boldly threatens checkmate

If white takes ep 42.fxg6 Qxe4 wins a bishop as there is no more checkmate by white

Time to check

Sep-08-10  scormus: W threatens # with the W major pieces but the humble Bp proves mightier, setting up a counter #, impeding W's threat and maintaining the attack on the WB. Looks like another immediate 0-1
Sep-08-10  Milesdei: White is threatening mate in one but 41...g5! brings down the house! After fxg6 ep white loses his bishop. Mate follows swiftly. Nice save by black.
Sep-08-10  Patriot: 41...g5

This stops mate while threatening it.

42.fxg6 e.p. Be6+ wins the queen for bishop at least.

Otherwise the queen must vacate g2 to stop mate, but really has no good square to prevent the loss of material. The threat is 42...Qh5+ 43.Kg2 Bxe4+ winning.

Sep-08-10
Premium Chessgames Member
  dzechiel: Black to move (41...?). Black is up two pawns. "Medium/Easy."

White threatens both 42 Bxd5 and 42 Qxg7#. Black could probably engineer a draw by

41...Qe3+ 42 Kh2

On 42 Kh4 black can play 42...Qg5+ 43 Qxg5 hxg5+ 44 Kxg5 Bxe4.

42...Qf4+ 43 Kh3

Not 43 Kh1 Bxe4.

43 Qf4+

repeating the position. Black might also try

41...Qxf5+ 42 Bxf5 Bxg2+ 43 Rxg2

giving black three pawns for the bishop.

However, black has much better at his disposal. After

41...g5!

the tables are turned. Now it's black who had dual threats, eg: 42...Qh4# and 42...Bxe4. So

42 fxg6 Bxe4

brings the game to an abrupt halt.

Time to check.

Sep-08-10  SamAtoms1980: 41....g5! flips the furniture.
Sep-08-10  chesssantosh: dear <dzechiel>
41...g5!
the tables are turned. Now it's black who had dual threats, eg: 42...Qh4# and 42...Bxe4. So

42 fxg6 Bxe4

but there is no need to take bishop after fxg6 rather Be6+ mates soon

Sep-08-10
Premium Chessgames Member
  Once: All in all you're just another brick in the wall.

One of my favourite kinds of chess moves are the ones that you put together, piece by piece, as if you are building a wall. Let me illustrate

The first stage is scanning the landscape. Black has to defend against white's mate threats, but he also has threats of his own. Specifically, the white king sitting on h3 has a target tattooed on his forehead along with the words "hit me". A square like h3 is one of the muddiest fringes of the battlefield. A king dressed in his fine robes and shining armour should never dip his toes in the mire of a square like h3.

Yup, it seems like attacking the misplaced white king on h3 looks promising. A good place to build a wall.

Look a little closer and we see that the white king is stalemated. And as we know, the standard plan for a stalemated king is to check, check, check until dead. And that gives us our plan - find a way to check the white king. And now we know what kind of wall we want to build.

But how to give check? We might look at bishop and rook moves and quickly decide that they are too slow. While we are engineering our check, white lands a mate on g7. Ooops. We need to prepare the way for our deadly check. Lay the foundations, you might say.

And eventually we find the first brick - 41...g5, threatening Qh4#. This is where a measure of luck comes in. You might spot this move straight away through a combination of skill, memory, perception and ... perhaps ... a little bit of random good fortune. Or you might get hooked on another move and have to convince yourself that it doesn't work before moving on to 41...g5. An alternative here is 41...Rd7 threatening Bxe4. But it's not nearly so sexy as 41...g5.

But you are not going to build a wall with just one brick. And all we have so far is just "41...g5, threatening Qh4#". Time to examine the white replies.

First, let's look at 42. exf6 (ep). This takes away our queen mate, but it opens up the diagonal to the white king's muddy square. Then we can play 42...Be6+ 43. Bf5 Bxf5+ 44. Qg4 Bxg4. That seems convincing enough.

To recap, our wall now has two bricks:

41...g5, threatening Qh4#
If 42. gxf6 Be6+ wins the house

Then we need to look for other black defences to 41...g5. He could move his queen away, either to give his king an escape square on g2 or to defend the h4 square. So let's look at these in turn. 42. Qg3 and 42 Qg4 both allow us to snaffle the white bishop with either Bxe4 or Qxe4. That's two more bricks for our wall, which currently looks like this:

41...g5, threatening Qh4#
If 42. gxf6 Be6+ wins the queen
If 42. Qg3 Bxe4 wins the bishop
If 42. Qg4 Bxe4 wins the bishop

If you want to be really thorough you would also look at other possible white defences like Qc2 and Qf1, but it doesn't take much to see that white cannot escape loss of material or mate.

Wall complete, our brickie stands back in satisfaction, lights a Marlboro, takes a swig from his mug of workman's tea (strong, lots of milk, three sugars), wolf-whistles a passing young lady, inflates the bill by a good 30% for luck and admires his handiwork.

We are satisfied that the move is safe. We lean forward, play 41...g5 and press the clock. And before we get a chance to write the move down, our opponent is offering his hand in resignation. Well played, sir.

Sep-08-10
Premium Chessgames Member
  patzer2: The move 41...g5! is a simple double attack that combines offense with defense to solve today's Wednesday puzzle.

In addition to defending against White's mate threat, the dual threat of mate or loss of the Bishop after 41...g5! forces White's resignation.

Sep-08-10  vodkaboris: Took me a moment or two to see that the ep capture was going nowhere. Once you know that, it's a no-brainer.
Sep-08-10
Premium Chessgames Member
  gofer: Black would like to play Bxe4, but has no time as white is threatening Qxg7#, so the mate threat needs to be dealt with first.

41 ... g5

Now the mate threat is gone and black has created its own, 42 ... Qh4#!!! So white has no time to play Bxd5. So how to deal with the mate threat and try not to lose Be4!?

42 fxg6(ep) Be6+ winning the queen

42 Qg3/Qg4 Bxe4 winning the bishop and if white exchanges queens on f4 then black will get 3 connected passed pawns! and if white doesn't exchange queens then Rd3+ is coming, so it really is game over.

This is a bit easy for a Wednesday... ...roll on Thursday. Time to check...

Sep-08-10  kurtrichards: 41. ... g5 winning...
Sep-08-10  Ratt Boy: Kinda funny, that Black didn't play it at his first opportunity. In the same position (Move 39), he played ...Qe3+. Repetition got him back, and then inspiration apparently struck.
Sep-08-10  M.Hassan: "medium/easy"- Black to move 42...?
Black is up by 2 pawns.
Black is being threatened by a mate on g7, so he must act fast and now.

41.....g5
prevents the checkmate and provides a post for Black Queen 42.fxg6 Be6+
43.Qg4 and White Queen is lost
***This muust be it***

Sep-08-10
Premium Chessgames Member
  whiteshark: Found 41...g5 even w/o my Wednesday morning coffee.
Sep-08-10  Eduardo Leon: Analysis by Eduardo León 0.01 alpha Chicken Edition. Reported not to be good enough for solving Sunday puzzles, but it should suffice for a Wednesday. <41...g5!>

At this point, the problem can be considered to be solved. If white is not masochistic, he can resign right now.

Sep-08-10  swr: Looks like:

41. ... g5
42. fxg6 Bxe4

Let's check.

Sep-08-10  timothee3331: It just ressembles the game Tal Korchnoi !
Sep-08-10  CHESSTTCAMPS: Black, on the move, has a two pawn lead and a pawn shelter for his king. However, white has a serious double attack that appears to win a piece, threatening 42.Qxg7# and 42.Bxd5. The first move that occurred to me on seeing this position was 41...Qxf5+(??), to get another pawn for the piece, but it became evident that this is not necessary. Back to basics: defend the attacked square, block the attacking piece, or make a compelling counter threat.

41... g5!!

... and if you can do all three with one move, that's probably the solution! Now black has two threats, 42...Qh4# and B(or Q)xe4. White's position is resignable, but he might try 42.fxg6 Bxe4 43.g7+ Kg8 and white has no good defense to the threat of 44...Bf5+ followed by 45... Rd2.

Sep-08-10
Premium Chessgames Member
  Willber G: <Ratt Boy: Kinda funny, that Black didn't play it at his first opportunity. In the same position (Move 39), he played ...Qe3+. Repetition got him back, and then inspiration apparently struck.>

Good question, perhaps he didn't plan this and lucked into it?

Sep-08-10  CHESSTTCAMPS: <Patriot, others><2.fxg6 e.p. Be6+ wins the queen for bishop at least.> Good point - the immediate check is more accurate.

<Wilbur G.> Or perhaps he wanted to make the time control first and then look for the winning move.

Sep-08-10  zb2cr: 41. ... g5 does the trick. After the <en passant> capture 42. fxg6, Be6+ forces White to interpose his Bishop with 43. Bf5. Black then wins the Bishop with 43. ... Bxf5+, and White must sacrifice his Queen for nothing with 44. Qg4, Bxg4+. Now, if 45. Rxg4, Rd3+! If 46. Kh4, Qh2#, and 46. Rg3, Qxg3#, so White would have to abandon his Rook.

So back on move 45, White must play 45. Kg2, Rd2+; 46. Kh1, Qh2# or 45. Kh4, Be2+; 46. Kh3, Rd3+; 47. Kg2, Qg3; 48. Kh1, Qh3#.

Sep-08-10
Premium Chessgames Member
  agb2002: Black has two extra pawns.

White threatens 42.Qxg7# and 42.Bxd5.

The white bishop is pinned, which suggests 41... Qxf5+ 42.Bxf5 (42.Kh2 Qh5+ - +; 42.Kh4 Qg5+ - +; 42.Kg3 Bxe4 - +) Bxg2+ 43.Rxg2 and the chances are more or less even.

Another option is 41... Qe3+:

A) 42.Kg(h)4 Qxe4+ - +.

B) 42.Kh2 Qf4+ 43.Kh3 (43.Kh1 Qh4+ 44.Qh2 Bxe4+ - +; 43.Qg3 Bxe4 - +) Qe3+ repeats moves.

Finally, 41... g5 stops 42.Qxg7# and creates a double threat, 42... Qh4# and 42... Bxe4:

A) 42.fxg6 Bxe4 43.g7+ Kg8 - + [B+P].

B) 42.Qg4 Bxe4 - + [B+2P].

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