adding zobrist hashing

1 files changed, 26 insertions, 7 deletions

diff --git a/src/uci.cpp b/src/uci.cpp
index 6c035d5..23e8419 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -14,6 +14,7 @@
 #include "board/board.hpp"
 #include "board/fen.hpp"
 #include "bot.hpp"
+#include "book.hpp"
 #include "misc.hpp"
 #include "moves.hpp"
 #include "uci.hpp"
@@ -222,13 +223,25 @@ static void GoCommand(Game *game, std::string &cmd) {
     std::cout << "Fatal: Depth must be positive integer";
     exit(1);
   }
-  move_options options = {
-      .wtime = wtime,
-      .btime = btime,
-      .wncr = wncr,
-      .bncr = bncr,
-  };
-  uint16_t best = GetBestMove(game, depth, options);
+
+  // Try opening book first
+  uint16_t bookMove = 0;
+  if (game->MoveClock < GetBookDepth()) {
+    bookMove = ProbeBook(GenerateZobristKey(game));
+  }
+
+  uint16_t best;
+  if (bookMove != 0) {
+    best = bookMove;
+  } else {
+    move_options options = {
+        .wtime = wtime,
+        .btime = btime,
+        .wncr = wncr,
+        .bncr = bncr,
+    };
+    best = GetBestMove(game, depth, options);
+  }
 
   Piece piece = game->pieces[getFromValueFromMove(best)];
 
@@ -309,6 +322,8 @@ void Uci() {
   Game game = initBoard(starting_fen, &transpositions);
   std::string cmd;
 
+  InitBook("book.bin");
+
   while (getline(std::cin, cmd)) {
     if (cmd == "quit") {
       return;
@@ -342,5 +357,9 @@ void Uci() {
     if (cmd == "moves") {
       movesCommnad(&game);
     }
+    if (cmd == "hash") {
+      uint64_t hash = GenerateZobristKey(&game);
+      std::cout << hash << "\n";
+    }
   }
 }