Update README.md

add potential bugs of leela.

README.md

@@ -28,3 +28,27 @@ MCTS
 ## agent (optional)
 
 DQNAgent etc.
+
+Pontential Bugs:
+0. Wrong calculation of eval value
+UCTNode.cpp
+106     if (to_move == FastBoard::WHITE) {
+107         net_eval = 1.0f - net_eval;
+108     }
+
+309         if (tomove == FastBoard::WHITE) {
+310             score = 1.0f - score;
+311         }
+
+1. create children only on leaf node
+UCTSearch.cpp
+ 60     if (!node->has_children() && m_nodes < MAX_TREE_SIZE) {
+ 61         float eval;
+ 62         auto success = node->create_children(m_nodes, currstate, eval);
+ 63         if (success) {
+ 64             result = SearchResult(eval);
+ 65         }
+ 66     }
+
+
+