making cache have depth

1 files changed, 5 insertions, 3 deletions

diff --git a/src/bot.cpp b/src/bot.cpp
index 8a570e4..3394ae2 100644
--- a/src/bot.cpp
+++ b/src/bot.cpp
@@ -137,8 +137,10 @@ float minimax(int depth, Game *b, float alpha, float beta) {
   uint64_t gameHash = GenerateZobristKey(b);
 
   if (b->Transpositions->contains(gameHash)) {
-    float value = b->Transpositions->at(gameHash);
-    return value;
+    TranspositionsEntry data = b->Transpositions->at(gameHash);
+    if (data.depth >= depth) {
+      return data.Eval;
+    }
   }
   auto moves = GetLegalMoves(b);
   if (moves.size() == 0) {
@@ -181,7 +183,7 @@ float minimax(int depth, Game *b, float alpha, float beta) {
     }
   }
 
-  b->Transpositions->operator[](gameHash) = bestEval;
+  b->Transpositions->operator[](gameHash) = {depth, bestEval};
   return bestEval;
 }
 int PSTIndex(int square, bool white) { return white ? square : (56 ^ square); }