Lozza has a standard/simple PVS implementation and seems OK with the position in terms of mate distances. Presumably Myrddin thinks he(?) is further from the root that he really is? - given that having observed a gazillion games between the two, Lozza and Myrddin search to the same depths kindasortaish...JVMerlino wrote: As far as I'm aware, this behavior shouldn't happen. Maybe I'm wrong, but does this mean that there's a bug in my PVS implementation?
jm
Live link of Lozza analysis (eats cpu) - https://goo.gl/eph5eN
Lozza gets a root score <= alpha at depth 25 so opens up the window to find the mate.
source: http://op12no2.me/toys/lozza/lozza.js