Better understanding of stuff like KRKRB == drawish, Q's come off = !drawish
Pawnhash size tunable from cmdline again
Think about when to avoid nullmove pruning based on checks in the line
Think about futility pruning when a >= +NMATE
Stick eval / king score in ply info and use it to trigger extensions

r2r4/p4pk1/2p3p1/1p1nPR2/5p1Q/2N5/PPPq4/1K4R1 w - - 0 0 -- check extension crazy