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Subject: ECM errata (151 thru 200)

Author: Amir Ban

Date: 07:49:03 01/20/98



Here's a new bunch:


No. 153 (Qd8):

Right, but Qd6 is equally good.

Recommend: Add Qd6 as side solution.


No. 162 (Rd7+):

I find Rb8 which also wins, though Rd7+ analysis proves it's correct.

Recommend: No change, or add Rb8 as side solution.


No. 180 (Bd4):

This must be a typo. Correct is Bc4.

Recommend: Change key to Bc4.


No. 186 (Nxh6):

Nxh6 is crushing. I find Qe8 which is good for only +4.

Recommend: Add Qe8 as side solution.


No. 187 (Nxe7):

A hard one for me. The object of Nxe7 was not clear but after Nxe7 Nxe7
Rb3 it turns out that it's correct, and is meant to decoy the knight so
as to trap the black queen.

Recommend: No change.


No. 190 (Nd7):

I can't attach any meaning to the key move. I find Ne7+ so this may be
another typo. Ne7+ Kh8 Rd8! looks correct but doesn't do more than win a
pawn.

Recommend: Change key to Ne7+.


No. 191 (Bd3):

I have difficulty in finding the key move, but Bd3 Qxd3 Rg1+ is indeed
crushing. I do find Qd4 for a score of 3.5.

Recommend: No change.


No. 193 (Nb6):

Correct, but a tough one, because there's an apparent defense that
ultimately fails. The idea is 1.Nb6 Nxb6 2.Rc7 Qxc7 3.Qxe6+ wins.
Apparently black has 2...e5, which closes out the bishop and holds, but
further analysis shows that 3.Rxd7 Rxd7 4.Qe6+ Kh8 5.Nf7+ Kg7 6.Bc1
wins.

Recommend: No change.


No. 198 (Ba6):

I find Nc5 immediately. It's easy and wins a whole rook. Don't know what
the point of Ba6 was, but looks like they overlooked the simpler and
better possibility.

Recommend: Change key to Nc5.


Amir



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