120 possible undo Moves. If Black "passes" each move.

project/src/main/jni/droidzebra-jni.c

@@ -71,7 +71,7 @@ static int s_practice_mode = FALSE;
 static const char* s_forced_opening_seq = NULL;
 static int s_use_book = TRUE;
 static int s_enable_msg = TRUE;
-static int s_undo_stack[128];
+static int s_undo_stack[120]; //60 black and 60 White Moves. A move can be "PASS"
 static int s_undo_stack_pointer = 0;
 // --
 
@@ -1023,10 +1023,7 @@ void _droidzebra_undo_all(int* side_to_move)
 	if(score_sheet_row==0 && *side_to_move==BLACKSQ) return;
 
 	do {
-        droidzebra_message_debug("undoall Before: %d", s_undo_stack_pointer);
-
         _droidzebra_undo_stack_push(disks_played);
-        droidzebra_message_debug("undoall After: %d", s_undo_stack_pointer);
 
         *side_to_move = OPP(*side_to_move);
 
@@ -1127,7 +1124,7 @@ void _droidzebra_throw_engine_error(JNIEnv* env, const char* msg)
 
 void _droidzebra_undo_stack_push(int val)
 {
-    assert(s_undo_stack_pointer< 128);
+    assert(s_undo_stack_pointer< 120);
 	s_undo_stack[s_undo_stack_pointer++] = val;
 }