+ // Step 5. Evaluate the position statically
+ // At PV nodes we do this only to update gain statistics
+ isCheck = pos.is_check();
+ if (!isCheck)
+ {
+ EvalInfo ei;
+ ss[ply].eval = evaluate(pos, ei, threadID);
+ update_gains(pos, ss[ply - 1].currentMove, ss[ply - 1].eval, ss[ply].eval);
+ }
+
+ // Step 6. Razoring (is omitted in PV nodes)
+ // Step 7. Static null move pruning (is omitted in PV nodes)
+ // Step 8. Null move search with verification search (is omitted in PV nodes)
+
+ // Step 9. Internal iterative deepening