# chess online

## CHESS TACTICS #30226

 Problem's rating: 1777 Avg. time to solve: 02:05 Total attempts: 564 Solved percentage: 49.6%
From Comment
 asnrgant10-Apr-11, 13:18

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Often I have the right piece but according to the wrong square. When I replay the square is immaterial. How can this be.
 meko01004-May-11, 09:06

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what is the problem by trading Queens?
kaiserking
07-Jun-11, 00:38

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To asnrgant
The problem is...the square is never immaterial. Which square you move your piece to will determine how much more of an advantage you gain. The square you place your piece on that delivers maximum advantage solves it for you.
dboysen
23-Jul-11, 08:07

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Logic?
I agree with Meko010. Exchanging Queens appears to be the correct move. 2... Qxe2 followed with 3. Nxe2.

I do not see an advantage with 2... Qxb2+

 breakerofwind23-Jul-11, 09:11

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Black will lose a piece in any event. I would also trade queens, but have the knight take the bishop with check as an in-between move.

2. Nb5 Qxe2
3. Nxd6+ Kf8
4. Nxe2
dboysen
24-Jul-11, 12:36

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Loss of piece -bishop vs. queen
Exactly. Yes, black will lose a piece but the loss of a bishop is preferable to the loss of a queen especially when black can exchange queens and be -3 instead of -6. I think that the rating of the problem being 1741 the better solution would be for the exchange of queens. White has the better position, regardless.
howru
11-Oct-11, 20:51

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I looked at Nb5 as the possible solution but thought that couldn't be it because after the trade of queens (which I firmly believe is what black SHOULD have done), white would lose the knight. It doesn't matter if white moves Nxd6+ because Ke7 causes white to lose that piece.

1. ... Bd6
2. Nb5 Qxe2
3. Nxd6+ Ke7
4. Nxe2 Kxd6
dboysen
14-Oct-11, 19:50

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Interesting dilemma
The main line of play gives White a superior advantage. White retaining the queen is strong but black is castled and can possibly fight back. Black's position appears a bit stronger than the alternate line of exchanging queens... but...

The exchanging of the queens provides the position above and appears worthy of a fight for black as well without the threat of the queen. Weaker perhaps but maybe a good defensive battle. Either way, White's Knight move to b5 was spectacular.

bossegiraf
11-Nov-11, 09:39

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#Howru
1. ... Bd6
2. Nb5 Qxe2
3. Nxd6+ Ke7
4. Nxe2 Kxd6

If black play Ke7 white can simply take the bishop on c8 with check and take the queen with the knight afterwards and still win a piece.

howru
12-Nov-11, 07:57

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@bossegiraf
I see... that would only result in a +3 for white instead of the +6 from this solution. But that still doesn't solve the problem of why black didn't trade queens.
bossegiraf
13-Nov-11, 07:48

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He will get both the bishop on b2 and the knight on b5 using the solution.
1. ... Bd6
2. Nb5 Qxb2+
3. Kxb2 cxb5
4. Bxb5 0-0

BUT he will lose the b5 pawn afterwards. Using the solution it will result in +4 to white, but for the pawn black is still able to castle, gets an open c-file for counterplay and is able keep the bishop pair + he removes 2 of whites stronger pieces(The bishop on b2 and the knight on b5).

Trading queens white only gets +3 but black can no longer castle and must move his king to f8, loses the bishop pair, helps white develop his last knight. Also the white queen is not very well placed.

In either case the black position is lost. If black is to have any chance of organizing his pieces and get counterplay i think the line from the solution is best.
neerajranjan
01-Dec-11, 06:44

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have heard "Boss is always right"..
few tactics I've observed are like that..do what ever one would fail..so was this one..

I think first move is important in such puzzles..after that..what ever is other party moves..doesn't matter a lot..