new threads.

protonspring · protonspring · commit 0b491296d4db · 2018-11-21T22:23:02.000-07:00
diff --git a/src/search.cpp b/src/search.cpp
@@ -61,10 +61,6 @@ namespace {
   // Different node types, used as a template parameter
   enum NodeType { NonPV, PV };
 
-  // Sizes and phases of the skip-blocks, used for distributing search depths across the threads
-  constexpr int SkipSize[]  = { 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
-  constexpr int SkipPhase[] = { 0, 1, 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 6, 7 };
-
   // Razor and futility margins
   constexpr int RazorMargin = 600;
   Value futility_margin(Depth d, bool improving) {
@@ -353,9 +349,9 @@ void Thread::search() {
       // Distribute search depths across the helper threads
       if (idx > 0)
       {
-          int i = (idx - 1) % 20;
-          if (((rootDepth / ONE_PLY + SkipPhase[i]) / SkipSize[i]) % 2)
-              continue;  // Retry with an incremented rootDepth
+	  static int bits = 0x4C70F1CD;
+	  if ((bits >> ((idx + rootDepth / ONE_PLY)%32)) & 1)
+             continue;
       }
 
       // Age out PV variability metric
