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|Oct-18-11|| ||rhickma4: A simple combination wins a piece
40...Rxc4 41.Qxh6 Rc2+
|Oct-18-11|| ||Philistine: Fairly straight forward. It seems like quite a blunder for a 2517 player|
|Oct-18-11|| ||andrewjsacks: Right. Time pressure just before the control at move 40.|
|Oct-18-11|| ||Phony Benoni: A common combination, demonstrating the primacy of check over unimportant considerations. A desperado piece unleashes an attack by its queen upon the other queen. If the opponent captures the queen, the desperado piece extracts itself with check, and the queen is recaptured.|
The theme is commonly seen in the Sicilian, though I've found examples from other openings. Here's the simple form, from D Norwood vs C Beaumont, 1989, White to play:
click for larger view
<13.Nd5!> is the desperado move, with 13...Qxd2 14.Nxe7+ to follow.
The idea can be the prelude to more complicated play, as in Sasikiran vs D Pruess, 2008, White to play:
click for larger view
The game finished <19.Nd5 Qd8 20.Rxc8 Bxc8 21.Bxe5> 1-0
And, no matter how you count it up. White wins at least a piece.
|Oct-18-11|| ||iamcoolright: The main trick is realizing that you have to counter the zwischenzug 40. ... Qxh6 with 41. Rc2+! to finish a piece up rather than the exchange down.|
|Oct-18-11|| ||sevenseaman: The White Q is hanging on to one of its <N at c4>'s legs.
Any mishap to the N imperils the Q.
Order of moves is still critical to success. <The N
has to be taken first>. <40...Rxc4>. If now a fighting
Persson responds belligerently <41. Qxh6> You have to be
on the button to aggressively engage the White K.
< 40...Rxc4 41. Qxh6 Rc2 + 42. Rf2 Rxf2+ 43. Kxf2>.
And only now can you take the White Q, <43...gxh6> and
be a winner of the brief skirmish for superiority.
Who can dispute that Black rules the landscape now. A
mere ritual remains.
< 40...Rxc4 41. Qxh6 Rc2 + 42. Rf2 Rxf2+ 43. Kxf2 gxh6>
|Oct-18-11|| ||al wazir: Gajadin must count this as the game of his life: beating a GM, a player with a rating more than 300 points higher! Yes, it was the result of a blunder, but black was applying pressure most of the way. Giving up the b- in order to open up a line of attack was an especially good idea.|
|Oct-18-11|| ||sevenseaman: Thanks <Phony Benoni> Thats how a solution ought to be written. One can only aspire to be a librarian, with so much ready reference! How can you do all this and still be up early?|
<Tiger Hillarp Persson> got one in the gut from <Gajadin> who?
|Oct-18-11|| ||M.Hassan: "Easy" Black to play 40....?
Black is a pawn down.
Both Queens are on a diagonal looking at each other.White Queen is supported by Knight and Black by the g pawn. black removes protector of the Queen by:
<if 41.Rxc4 or 41.bxc4 Qxd2 and white Queen is lost>
Black is now ahead by a Bishop for a pawn.
Time to check
|Oct-18-11|| ||lost in space: 40...Rxc4! 21. Qxh6
(other moves like 21. Rxc4 or bxc4 are losing the white queen)
21...Rc2+ 22. Rf2 Rxf2+ 23. Kxf2 gxh6
and Black has enough to win (even though his Be7 is only a big pawn; most probably black is activating his remaining pieces like this: Rb8 and Bd8
|Oct-18-11|| ||Once: Tis said that my enemy's enemy is my friend. Well, this POTD demonstrates that the reverse is also true. My enemy's friend is also my enemy.|
Whenever we see one piece supporting another, we should look to see if we can kick the supporter away. Kill the supporter and the supportee, being unsupported, wll also die. What sport!
Here we also need a little zwischenzug, an intermezzo to nudge our Rc4 to safety with 41...Rc2+.
In yesterday's POTD, <sevenseaman> treated us to a limerick. So how about a bit of William Blake?
Tiger, Tiger, burning bright
In the forests of the night
What immortal hand or neck
Could lose your queen to a black rook check?
|Oct-18-11|| ||strobane: What's wrong with 40...QxQ+|
|Oct-18-11|| ||Jedzz: <strobane: What's wrong with 40...QxQ+>
41. NxQ, and the opportunity to win a piece for nothing (as explained above) vanishes.|
|Oct-18-11|| ||gofer: Remove the defender...
<40 ... Rxc4>
<41 Qxh6 Rc2+>
<42 Kf1 gxh6>
<43 h4 Kh7>
White can hope for a breakthrough on the kingside, but it is very unlikely to happen.
<44 g4 Rg8>
<45 gxh5 Rcg7>
Black has control of the g file. Time for white to go quietly.
|Oct-18-11|| ||TheBish: T Hillarp Persson vs D Gajadin, 2010|
Black to play (40...?) "Easy", White is up a pawn.
40...Rxc4! 41. Qxh6 Rc2+ followed by ...gxh6 wins a piece.
It looks like Persson, a GM, offered a trade of queens (being up a pawn) and missed a simple tactic. Time trouble maybe?
|Oct-18-11|| ||agb2002: Black has a bishop for a knight and a pawn.
White threatens 41.Qxh6 gxh6 42.Rh4.
The knight protects the queen. Hence 40... Rxc4 41.Qxh6 Rc2+ wins.
|Oct-18-11|| ||whiteshark: 40...Rxc4 wins a minor piece. Removing the guard followed by an in-between check on c2.|
|Oct-18-11|| ||Treestar: Not sure if black can win this but I am sure is mightily relieved to bag the knight thanks to the possibility of an in-between check. <40…Rxc4 41.Qxh6 Rc2+> which saves the rook before recapturing on h6. White isn’t forced to take on h6, but must make a move to deal with the Q hanging on d2, so for instance <41.Qe2 > There are options for both sides, but not for the knight, alas.|
|Oct-18-11|| ||FSR: Holy zwischenzug, Batman! 40...Rxc4! 41.Qxh6 Rc2+!|
|Oct-18-11|| ||morfishine: <40...Rxc4> wins a piece for Black|
While 40.Qd2 is clearly a blunder, it allowed this game to show-up on the POTD dinner-plate.
<Once> Nice ditty
|Oct-18-11|| ||zb2cr: Bah. I must not have been fully awake--I figured 40. ... Qxd2+; 41. Nxd2, Rxe4 won a full Rook--not realizing that now the Knight protected the Rook on e4.|
|Oct-18-11|| ||jackalope: Black is down a pawn and has a DSB vs a knight. White's queen is forking Black's queen and a rook but the rook is positioned to take White's knight and can gain a tempo. This looks like a struggle for pawns as neither side has an immediate mate threat.|
<40... Rxc4 41. Qxh6 Rc2+ White doesn't need Black's rook wandering around in his backfield so 42. Rf2 Rxf2+ 43. Kxf2 gxh6>
Black has gained a material (Black has a rook and a bishop vs White's rook) and positional advantage that should be enough to win. Time to check.
|Oct-18-11|| ||Patriot: 40...Rxc4 41.Qxh6 Rc2+ 42.Rf2 Rxf2+ 43.Kxf2 gxh6
I also looked at 40...Qxd2 but the knight guards the e4-rook after 41.Nxd2.
|Oct-18-11|| ||ismet: 2667 rating peak point ! hahahahah that must be joke|
|Oct-18-11|| ||Marmot PFL: White appears much better here, with a pawn wedge that cramps blacks pieces. It is black's move though, and because the white queen is unguarded Rxc4 wins a piece.|
White is the stronger player too, with a huge rating edge (over 400 points). Almost any resonable 40th move should win eventually, but he plays the ridiculous Qd2??
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