diff --git a/src/search.cpp b/src/search.cpp
index 61ac9a6a0b8..21d5d786b6b 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1844,6 +1844,7 @@ void Thread::idle_loop(SplitPoint* sp_master) {
           assert(is_searching);
 
           is_searching = false;
+          sp->allSlavesRunning = false;
           sp->slavesMask &= ~(1ULL << idx);
           sp->nodes += pos.nodes_searched();
 
@@ -1860,20 +1861,19 @@ void Thread::idle_loop(SplitPoint* sp_master) {
           // unsafe because if we are exiting there is a chance are already freed.
           lock_release(sp->lock);
 
-          // Try to reparent to another split point
+          // Try to reparent to the first split point, with still all slaves
+          // running, where we are available as a possible slave.
           for (int i = 0; i < Threads.size(); i++)
           {
               Thread* th = &Threads[i];
               int spCnt = th->splitPointsCnt;
               SplitPoint* latest = &th->splitPoints[spCnt ? spCnt - 1 : 0];
 
-              // Find the first split point with still all slaves running
-              // where we are available as a possible slave.
               if (    this->is_available_to(th)
                   &&  spCnt > 0
                   && !th->cutoff_occurred()
-                  &&  latest->slavesMask == latest->allSlavesMask
-                  &&  more_than_one(latest->allSlavesMask))
+                  &&  latest->allSlavesRunning
+                  &&  more_than_one(latest->slavesMask))
               {
                   lock_grab(latest->lock);
                   lock_grab(Threads.splitLock);
@@ -1883,10 +1883,10 @@ void Thread::idle_loop(SplitPoint* sp_master) {
                   if (    this->is_available_to(th)
                       &&  spCnt == th->splitPointsCnt
                       && !th->cutoff_occurred()
-                      &&  latest->slavesMask == latest->allSlavesMask
-                      &&  more_than_one(latest->allSlavesMask))
+                      &&  latest->allSlavesRunning
+                      &&  more_than_one(latest->slavesMask))
                   {
-                      latest->slavesMask |= 1ULL << idx; // allSlavesMask is not updated
+                      latest->slavesMask |= 1ULL << idx;
                       curSplitPoint = latest;
                       is_searching = true;
                   }
diff --git a/src/thread.cpp b/src/thread.cpp
index a644cae9b64..631834da4b9 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -319,7 +319,7 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
   sp->master = master;
   sp->cutoff = false;
   sp->slavesMask = 1ULL << master->idx;
-  sp->allSlavesMask = 1ULL << master->idx;
+  sp->allSlavesRunning = true;
   sp->depth = depth;
   sp->bestMove = *bestMove;
   sp->threatMove = threatMove;
@@ -348,7 +348,6 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
       if (threads[i]->is_available_to(master))
       {
           sp->slavesMask |= 1ULL << i;
-          sp->allSlavesMask |= 1ULL << i;
           threads[i]->curSplitPoint = sp;
           threads[i]->is_searching = true; // Slave leaves idle_loop()
 
@@ -356,10 +355,7 @@ Value ThreadsManager::split(Position& pos, Stack* ss, Value alpha, Value beta,
               threads[i]->wake_up();
 
           if (++slavesCnt + 1 >= maxThreadsPerSplitPoint) // Master is always included
-          {
-              sp->allSlavesMask = 0; // Disable reparenting to this split point
               break;
-          }
       }
 
   master->splitPointsCnt++;
diff --git a/src/thread.h b/src/thread.h
index d60dd5f7fbc..9f0bb24add8 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -51,13 +51,13 @@ struct SplitPoint {
   // Shared data
   Lock lock;
   volatile uint64_t slavesMask;
-  volatile uint64_t allSlavesMask;
   volatile int64_t nodes;
   volatile Value alpha;
   volatile Value bestValue;
   volatile Move bestMove;
   volatile int moveCount;
   volatile bool cutoff;
+  volatile bool allSlavesRunning;
 };