From: Colin Paul Adams COLINA DEMON CO UK>
Date: 10 feb 2000
Subject: Re: CHU: Problem A15
>>>>> "Nick" == Nick Bardsley ICC CO UK> writes:
Nick> right (as far as I can see). The solution is wrong inasmuch
Nick> as the Ph's promotion is a typo. That is, '+' should be '='
No - it should be plain Ph - 2a - the = implies that there was a
choice.
Nick> for the Ph's second move. Whether the Ph is a Ph or has
Nick> promoted does not affect the need for the King to take it
Nick> (again, as far as I can see).
Well,
The "solution" is definitely wrong, even after correcting the
Phoenix's move.
Either
1) 2. K - 2b is not the correct defence (K - 3a is the
alternative, which holds out a long time), or
2) 3. K x 2a can be improved upon (I think) by 3. K - 1c
Then, as a tentative analysis, there is a mate:
4. FK - 7i, C - 2d
5. DK x 2d+, DH x 2d
6. FK x 2d, K x 2d
7. Ln x 4d x 4e then mate next move.
for instance. And this seems to me to be better resistance, as the
mate occurs a move later.
--
Colin Paul Adams
Preston Lancashire