// Step 8. Null move search with verification search (is omitted in PV nodes)
if ( !PvNode
&& eval >= beta
- && (ss->staticEval >= beta - 35 * (depth / ONE_PLY - 6) || depth >= 13 * ONE_PLY)
+ && ss->staticEval >= beta - 36 * depth / ONE_PLY + 225
&& pos.non_pawn_material(pos.side_to_move()))
{