Jeff Mullins Print E-mail
By Joel Benjamin   
April 3, 2007
Dear Joel,

I saw the following chess trap in one of Susan Polgar's Opening articles a while back in Chess Life Magazine. It leads to a very interesting position.

The position arises from the Giuoco Piano:

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 O-O 6.Bg5 h6 7.h4!? hxg5 8.hxg5 Ng4 9.g6 Nxf2 10.Nxe5


Position after 10.Nxe5

Now, after 10... Nxd1?? White has 11.gxf7+ Rxf7 12.Bxf7+ Kf8 13.Rh8+ Ke7 14.Nd5+ Kd6 15.Nc4 mate.

 
Position after 15.Nc4 mate

This is where Polgar left the analysis.

But what does White do if Black trips him up by playing 10... Nxh1!? (10... Nxe5?? 11.Qh5)? This leads to very interesting complexities that might not be as amicable to computer analysis as to Grandmaster analysis since, even though it is very tactical, it requires very long range planning involving the eschewing of material to be able to see an outcome that would allow White to draw (or even win). Is White busted, being down Rook + Bishop for two Pawns and with a Knight en prise, or is White's initiative and attack strong enough to get his material back, or even come out ahead?

White has multiple possibilities here (Bxf7+, gxf7+, Nxf7, Qh5).

11. Qh5. This seems to "cook Black's goose" with the seemingly unstoppable mate on h7, but now Black has the pretty Qh4+!!


Position after 11...Qh4+!!

After 12.Qxh4 Bf2+, Black gets his Queen back. 13.Qxf2 (Does White have anything better, eschewing the gain of material for time? If 13.Kd2 or Ke2, Bxh4 14.Rxh1 Nxe5! 14.Rxh4 Nxc4 ends White's hopes.) Nxf2. Now does White have anything better than 14.Nxf7? (If 14.Kxe2 Nxe5 and if 15.Nxc6 attempting to pick up the Knight on f2 for free, then 15... Nxe4 or Nxd3+ and White only has 1 (doubled) pawn for the exchange.) 14. Nxf7 Rxf7 (if 14... Ng4 15. Nh6+ picks up the Knight on g4; if 14... Nh1 15.Ke2 Ng6+ 16.Kf2 Nh5 17.Rh1 Rxf7 18.fxg7+ Kf8 19.Rxh5 and it looks like the f7 pawn will Queen after Rh8+) 15.gxf7+ Kf8 16.Kxf2 Ne5 17.Rf1 Nxc4 (not 17... Nxf7 18. Ke3 uncovering and pinning the Knight) 18.dxc4, and Black might eventually pick up the pawn on f7 leaving White one doubled pawn ahead with an isolated pawn as well.

Perhaps White can improve sooner. If White plays 11.Bxf7+ Rxf7 (Kh8?? 12.Qh5 mate) 12.gxf7+ Kf8, White is now two Bishops down for 2 Pawns (with Black soon to pick up the pawn on f7), has a Knight en prise, and Black even has threats of his own with 13...Qh4+ and further checks available on f2 and with Bishop, Knight, and Queen in the attack - even though White can probably escape to b1, his position seems to be completely losing to me. The same is true for 11.Nxf7, and White really needs to play forcing moves if he has any hope of coming out of this opening alive. If White plays 11.gxf7+, then 11... Rxf7 (else Qh5 mate), 12.Nxf7 threatening Qh5 and mate on h8 as well as Black's Queen (if Qh5 immediately [threatening the above trap checkmate with the Queen in place of the Rook], then 12... Nxe5 dashes White's hopes; if 12.Bxf7+, then 12... Kf8 and two White pieces are hanging). 12... Qh4+ and White's Queen cannot get to h5, and I don't see how White can make any more progress.

Are there flaws in my analysis? What is best play for both sides after 10... Nxh1?

Dr. Jeff Mullins
USCF Member

You have certainly provided a fertile position with lots of juicy tactics to consider! You are right that the clever resource 11... Qh4+!! makes the rook capture a serious attempt for Black to save the game. But I don't agree with some of your assessments after 13... Nxf2. You say 14.Nxc6 Nxd3+ leaves White with only one doubled pawn for the exchange, but after 14.cxd3 bxc6 15.Bxf7+ White recoups the exchange, with a probably superior endgame.


Position after 14. Nxf7

In any case, 14.Nxf7! is a big improvement.

After your suggested 14... Rxf7 15.gxf7+ Kf8 16.Kxf2 Ne5 Black is quite lost. 17.Rf1 is far from best; 17.Bb3 would avoid the doubled pawn you believe will save Black, while 17.Nb5 maximizes White's material advantage.

Other variations do not save Black either:
a) 14... Ng4 15.Nh6+ Kh8 16.Nxg4 d5 17.Bxd5 Bxg4 (17... Nd8 is necessary but White has massive compensation for the exchange) 18.Kd2 and the mate threat on the h-file is lethal;
b) 14... Nh1 15.Kd2 Ng3 16.Ne2! and again the h-file dooms Black. The most amusing possibility is 16... Na5 17.Bd5 c6 18.Nxg3 cxd5 19.Rh1 Rxf7 20.Rh8+! Kxh8 21.gxf7 and a queen is coming;


Analysis after 21. gxf7

c) 14... Ne7 (relatively best) 15.Ne5+ Kh8 16.Bf7! Nh3 17.gxh3 d6 averts disaster but White is well on top here, too;


Position after 17... d6

Still, White can do much better! 11.Qh5 is not best; after 11.gxf7+ Rxf7 12.Bxf7+ Kf8 13.Qh5! is devastating.


Position after 13.Qh5!

White's mating threats are supplemented by the vulnerability of Black's queen. There is no defense:
a) 13... Qh4+ 14.Qxh4 Bf2+ 15.Qxf2 Nxf2 16.Nxc6 and Black has no hope in the endgame;
b) 13... Nxe5 14.Qh8+ Ke7 15.Qh4+ nets the queen
c) 13... Bf2+ 14.Kd2 Nxe5 15.Qh8+ Ke7 16.Nd5+ again wins the queen. In both cases Black's uncoordinated pieces offer no defense.
d) 13... Bb4 14.0-0-0 (14.d4 is also good but this is more direct) 14... Ng3 (14... Bxc3 15.Ng6+! Kxf7 16.Qd5+ Kxg6 17.Qf5+ Kh6 18.Rxh1 mate is an attractive finish!) 15.Qh8+ Ke7 16.Qxg7 and White's threats are overwhelming;

I don't recall GM Polgar's column, and without a specific reference I don't know what she wrote. But if you call it a "trap" she probably did, too. Keep in mind that traps are not about perfect play, but illustrate dangers; in this case, excessive greed and neglect of the king's defenses! Black has a significant improvement in 9... Bxf2+!


Position after 9... Bxf2!

The position is still quite complex, but Black seems to be able to beat back the attack. For instance, 10.Ke2 (10.Kd2 can only be worse since Bf2-e3 can come with check) d6 11.Rh5 Be3 12.Qh1 Bh6 13.Rf1 Be6 14.Bxe6 fxe6 15.Qh3 Rxf3! 16.gxf3 Nd4+ with a winning advantage for Black.

I would like to agree with your thought on grandmaster vs. computer analysis, but the computer's suggestions to me were right on the money here. But you still need me to explain it all!

Joel Benjamin
 
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