update

src/mcts.jl

@@ -131,8 +131,10 @@ function expand(a::T1, node::MCTSNode, state::T2, decisionMaker::Function, state
     @show thoughtDict
     newstate = MCTStransition(a, node.state, thoughtDict)  #[] Implement your transition function
     
-    if newstate ∉ keys(node.children)
-      statetype = typeof(state)
+    if newstate ∉ keys(node.children) # BUG should be "key of the newstate" here not newstate
+      statetype = typeof(state) 
+
+      # BUG should be node.children[key of newstate] here not newstate. may be a uuid
       node.children[newstate] = MCTSNode(newstate, 0, 0.0, Dict{statetype, MCTSNode}())
     end
   end