Increase probcut margin for CTF variants

racingkings STC
LLR: -2.95 (-2.94,2.94) [0.00,10.00]
Total: 10039 W: 3296 L: 3245 D: 3498
http://www.variantfishtest.org:6543/tests/view/5e0f364e6e23db1ffe4a296c

racingkings LTC
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 9089 W: 2797 L: 2614 D: 3678
http://www.variantfishtest.org:6543/tests/view/5e11ade16e23db1ffe4a2983

kingofthehill STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 12632 W: 5423 L: 5158 D: 2051
http://www.variantfishtest.org:6543/tests/view/5e0f36376e23db1ffe4a2969

kingofthehill LTC
LLR: -2.97 (-2.94,2.94) [0.00,10.00]
Total: 21444 W: 8849 L: 8638 D: 3957
http://www.variantfishtest.org:6543/tests/view/5e11add66e23db1ffe4a2981

diff --git a/src/search.cpp b/src/search.cpp
index b3b3e0f..3393e29 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -893,7 +893,7 @@ namespace {
         &&  (pos.pieces() ^ pos.pieces(CLOBBER_PIECE))
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY)
     {
-        Value raisedBeta = std::min(beta + 191 * (1 + pos.check_counting() + (pos.extinction_value() != VALUE_NONE)) - 46 * improving, VALUE_INFINITE);
+        Value raisedBeta = std::min(beta + (191 + 20 * !!pos.capture_the_flag_piece()) * (1 + pos.check_counting() + (pos.extinction_value() != VALUE_NONE)) - 46 * improving, VALUE_INFINITE);
         MovePicker mp(pos, ttMove, raisedBeta - ss->staticEval, &thisThread->captureHistory);
         int probCutCount = 0;