One heat map per piece showing the piece square
table values Naddu actually uses at a given game phase. The
tapered eval blends the middlegame (mg) and endgame (eg)
tables with (mg * phase + eg * (24 - phase)) / 24, where the phase counts the pieces on the board for both
sides: knights and bishops 1 each, rooks 2, queens 4. So 24 is the start position (pure mg), 0 is kings and pawns only
(pure eg) and, say, a rook ending is 4. Drag the slider, middlegame on the left through to the endgame on the right, to watch the blend. The tables are fetched from the engine with
the pst command, so if you edit them in naddu.js this page follows. Boards are from white's side
with rank 8 at the top, red is good for the piece and blue is bad, on one colour scale shared by all six boards and fixed
across all phases.