For example, with a target word of RALLY ([challenge link]), guessing
ARRAY gives [elsewhere, elsewhere, absent, absent, correct].
This commit makes guessing SPRAY a violation, as we know that A cannot
be in the first or fourth positions (or else one of them would be
correct), and R cannot be in the second or third positions.
[challenge link]: https://hellowordl.net/?challenge=cmFsbHk
For example, with a target word of RALLY ([challenge link]), guessing
LEVEL gives [elsewhere, absent, absent, absent, elsewhere].
This commit makes guessing WORLD afterwards a violation, as there must
be at least two Ls in the target word.
This commit also makes it clearer that, when there is an absent clue,
the count of the letter must be exactly (number of non-absent clues with
that letter).
[challenge link]: https://hellowordl.net/?challenge=cmFsbHk
mcpower