Use more continuation histories.

[stockfish] / src / movepick.cpp

diff --git a/src/movepick.cpp b/src/movepick.cpp
index eea1d49e44703fe4b1281d07ae4f71a057d7caf8..bc3fcf7ed6b8f53a955c582275d91d9a309e96c6 100644 (file)
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -141,6 +141,7 @@ void MovePicker::score() {
           m.value =  2 * (*mainHistory)[pos.side_to_move()][from_to(m)];
           m.value += 2 * (*continuationHistory[0])[pc][to];
           m.value +=     (*continuationHistory[1])[pc][to];
+          m.value +=     (*continuationHistory[2])[pc][to] / 4;
           m.value +=     (*continuationHistory[3])[pc][to];
           m.value +=     (*continuationHistory[5])[pc][to];