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Subject: ECM errata (501 thru 600)

Author: Amir Ban

Date: 01:33:34 02/09/98



This group is relatively easy and problem-free, so this will be short.
The hardest part is yet to come.


No. 504 (Nxf4):

This may be the best move, but it doesn't achieve much more than
equality: 1.Nxf4 Nf3+ 2.Bxf3 Bxb2 3.Rb1 Bg7 and though Junior prefers
white, I think I would take black.

Recommend: Drop it.


No. 539 (Qh5):

Not to argue with the key move, but 1... Nf2+ 2. Kh2 Rd3 3.Qc5 (Qb4)
Rxh3+ 0-1.

Recommend: Add Nf2+


No. 551 (c4):

It's correct. This is a pretty exercise in stalemating yourself.

Recommend: No change.


No. 553 (Nxf7):

I get Rxf7, which probably executes the key idea in the right order. The
problem with Nxf7 is Be6!

Recommend: Change key to Rxf7.


No. 557 (Bxh4):

I get Rf3. This looks like the most forceful move. The key is also ok.

Recommend: Add Rf3.


No. 559 (Ng5):

Again this one may be best but doesn't achieve much: 1.Ng5 Bxg5 2.Bxg5
Be6! (but not Qd4+). White gets the c-pawn for all his trouble.

Recommend: Drop it.


No. 560 (Nf3+):

A position with dizzy complications. I find Ndc4 (+133). 1... Nf3+
2.Rxf3 Nf5 3.Rxf5 gets about the same. I don't know what the intended
line is.

Recommend: Investigate.


No. 562 (Nxf7):

The line is 1.Nxf7 Rxf7 2.Bxf6 Bxf6 3.Rxf6. It's okay to play Bxf6
first.

Recommend: Add Bxf6.


No. 566 (Rxc5):

I have a cook for this: Ne5! This eliminates the d6 pawn, but from the
other side.

Recommend: Add Ne5.


No. 592 (Rxc5):

I find Be3, and find that the pin on c5 does more (+351) than taking on
c5.

Recommend: Add Be3.


No. 597 (Bf4):

I find Ba3 (+115). It's a bit fuzzy. I see that Bf4 only wins a pawn.
Ba3 wins an exchange, but maybe the knight will be trapped on a8.

Recommend: Investigate.


No. 600 (f5):

I probably should try this with Hiarcs. I don't see a win after either
exf5 or Kg7.

Recommend: Investigate.


Amir



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