Merge pull request featurecat#766 from kaorahi/fix765_handicap

Fix featurecat#765 (handicap bug in featurecat#758)

src/main/java/featurecat/lizzie/rules/SGFParser.java

@@ -121,7 +121,8 @@ private static boolean parse(String value) {
       Lizzie.leelaz.supportScoremean = false;
     }
 
-    // Detach engine for avoiding useless "play" and "undo" (#752).
+    // Detach engine for avoiding useless "play" and "undo" (#752)
+    // except for handicap stones in parseValue() (#765).
     Lizzie.leelaz.isAttached = false;
     parseValue(value, null, false);
     Lizzie.leelaz.isAttached = true;
@@ -347,6 +348,8 @@ private static BoardHistoryList parseValue(
                 }
               }
             } else {
+              // Setting handicap stones. We need to send "play" to the engine here.
+              Lizzie.leelaz.isAttached = true;
               if (move == null) {
                 if (history == null) {
                   Lizzie.board.pass(color);
@@ -365,6 +368,7 @@ private static BoardHistoryList parseValue(
               } else {
                 history.flatten();
               }
+              Lizzie.leelaz.isAttached = false;
             }
           } else if (tag.equals("PB")) {
             blackPlayer = tagContent;