From: Colin Paul Adams <colin <at> COLINA <dot> DEMON <dot> CO <dot> UK>
Date: 10 feb 2000
Subject: Re: CHU: Problem A15

>>>>> "Nick" == Nick Bardsley <nbardsley <at> ICC <dot> CO <dot> 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