Removing history condition

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 2d4a3f3d35b423573eebcbc96e2386ee33a13d12..6214fb5b39b564d12cf47699a2adb74c378c095d 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -169,7 +169,7 @@ namespace {
 } // namespace
 
 
-/// Search::init() is called at startup to initialize various lookup tables
+// Search::init() is called at startup to initialize various lookup tables
 
 void Search::init() {
 
@@ -178,7 +178,7 @@ void Search::init() {
 }
 
 
-/// Search::clear() resets search state to its initial value
+// Search::clear() resets search state to its initial value
 
 void Search::clear() {
 
@@ -191,8 +191,8 @@ void Search::clear() {
 }
 
 
-/// MainThread::search() is started when the program receives the UCI 'go'
-/// command. It searches from the root position and outputs the "bestmove".
+// MainThread::search() is started when the program receives the UCI 'go'
+// command. It searches from the root position and outputs the "bestmove".
 
 void MainThread::search() {
 
@@ -268,9 +268,9 @@ void MainThread::search() {
 }
 
 
-/// Thread::search() is the main iterative deepening loop. It calls search()
-/// repeatedly with increasing depth until the allocated thinking time has been
-/// consumed, the user stops the search, or the maximum search depth is reached.
+// Thread::search() is the main iterative deepening loop. It calls search()
+// repeatedly with increasing depth until the allocated thinking time has been
+// consumed, the user stops the search, or the maximum search depth is reached.
 
 void Thread::search() {
 
@@ -786,8 +786,7 @@ namespace {
         &&  eval >= beta
         &&  eval < 29462 // smaller than TB wins
         && !(  !ttCapture
-             && ttMove
-             && thisThread->mainHistory[us][from_to(ttMove)] < 989))
+             && ttMove))
         return eval;
 
     // Step 9. Null move search with verification search (~35 Elo)
@@ -1506,9 +1505,7 @@ moves_loop: // When in check, search starts here
         futilityBase = std::min(ss->staticEval, bestValue) + 200;
     }
 
-    const PieceToHistory* contHist[] = { (ss-1)->continuationHistory, (ss-2)->continuationHistory,
-                                         (ss-3)->continuationHistory, (ss-4)->continuationHistory,
-                                          nullptr                   , (ss-6)->continuationHistory };
+    const PieceToHistory* contHist[] = {(ss-1)->continuationHistory, (ss-2)->continuationHistory};
 
     // Initialize a MovePicker object for the current position, and prepare
     // to search the moves. Because the depth is <= 0 here, only captures,
@@ -1837,8 +1834,8 @@ moves_loop: // When in check, search starts here
 } // namespace
 
 
-/// MainThread::check_time() is used to print debug info and, more importantly,
-/// to detect when we are out of available time and thus stop the search.
+// MainThread::check_time() is used to print debug info and, more importantly,
+// to detect when we are out of available time and thus stop the search.
 
 void MainThread::check_time() {
 
@@ -1870,8 +1867,8 @@ void MainThread::check_time() {
 }
 
 
-/// UCI::pv() formats PV information according to the UCI protocol. UCI requires
-/// that all (if any) unsearched PV lines are sent using a previous search score.
+// UCI::pv() formats PV information according to the UCI protocol. UCI requires
+// that all (if any) unsearched PV lines are sent using a previous search score.
 
 string UCI::pv(const Position& pos, Depth depth) {
 
@@ -1929,10 +1926,10 @@ string UCI::pv(const Position& pos, Depth depth) {
 }
 
 
-/// RootMove::extract_ponder_from_tt() is called in case we have no ponder move
-/// before exiting the search, for instance, in case we stop the search during a
-/// fail high at root. We try hard to have a ponder move to return to the GUI,
-/// otherwise in case of 'ponder on' we have nothing to think about.
+// RootMove::extract_ponder_from_tt() is called in case we have no ponder move
+// before exiting the search, for instance, in case we stop the search during a
+// fail high at root. We try hard to have a ponder move to return to the GUI,
+// otherwise in case of 'ponder on' we have nothing to think about.
 
 bool RootMove::extract_ponder_from_tt(Position& pos) {