Originally posted by Tyrannosauruschex
I have been testing out a new fritz with some especially difficult puzzles but it seems to be able to solve every one it is given more or less instantly. I didnt realise the computer was quite THAT good now - has anybody else managed to find a mating attack, or win of material that an engine cannot spot? The quest continues....
how about this position?
These types of positions break many engines, where the very simple rule
Rooks behind Passed pawns
Seems to be violated. Interestingly enough, some engines will
Re1 and fail to see Ra1
and instead place useless intermezzo's in this ending,
whereby failing horribly.
The Ra8 problem is maddening, where many engines prune the correct move out of
the tree very early. It seems related to a tier scoring issue, where in the table the
black king has several moves before the value of the position will finally begin to
diminish for black, and thus the engines miss it! This position itself, is really an
extension of the horizon effect; only with tier scoring having produced a violent ripple
on the engines ability to play this ending correctly.