QueensGambit · QueensGambit · Aug 8, 2023 · Aug 8, 2023 · Aug 8, 2023
diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
@@ -43,7 +43,7 @@ if (MODE_CHESS)
 #    add_definitions(-DVERSION=2)
 #    add_definitions(-DSUB_VERSION=8)
     add_definitions(-DVERSION=3)
-#    add_definitions(-DSUPPORT960)
+    add_definitions(-DSUPPORT960)
 endif()
 
 if (MODE_LICHESS)
@@ -57,7 +57,7 @@ if (MODE_LICHESS)
     add_definitions(-DATOMIC)
     add_definitions(-DHORDE)
     add_definitions(-DRACE)
-#    add_definitions(-DSUPPORT960)
+    add_definitions(-DSUPPORT960)
     add_definitions(-DMCTS_TB_SUPPORT)
     add_definitions(-DVERSION=1)
 endif()

diff --git a/engine/src/environments/chess_related/boardstate.h b/engine/src/environments/chess_related/boardstate.h
@@ -95,9 +95,9 @@ class StateConstantsBoard : public StateConstantsInterface<StateConstantsBoard>
             return OutputRepresentation::MV_LOOKUP[action];
         }
     }
-    static void init(bool isPolicyMap) {
+    static void init(bool isPolicyMap, bool is960) {
         OutputRepresentation::init_labels();
-        OutputRepresentation::init_policy_constants(isPolicyMap);
+        OutputRepresentation::init_policy_constants(isPolicyMap, is960);
     }
     // -------------------------------------------------
     // |           Additional custom methods           |

diff --git a/engine/src/environments/chess_related/outputrepresentation.cpp b/engine/src/environments/chess_related/outputrepresentation.cpp
@@ -36,13 +36,8 @@ void apply_softmax(DynamicVector<float> &policyProbSmall)
     policyProbSmall = softmax(policyProbSmall);
 }
 
-void OutputRepresentation::init_policy_constants(bool isPolicyMap)
+void OutputRepresentation::init_policy_constants(bool isPolicyMap, bool is960)
 {
-#ifdef SUPPORT960
-    const bool is960 = true;
-#else
-    const bool is960 = false;
-#endif
     // fill mirrored label list and look-up table
     for (size_t mvIdx = 0; mvIdx < StateConstants::NB_LABELS(); mvIdx++) {
         LABELS_MIRRORED[mvIdx] = mirror_move(LABELS[mvIdx]);

diff --git a/engine/src/environments/chess_related/outputrepresentation.h b/engine/src/environments/chess_related/outputrepresentation.h
@@ -87,8 +87,9 @@ struct OutputRepresentation{
     /**
      * @brief init_policy_constants Fills the hash maps for a action to nn index binding.
      * @param isPolicyMap describes if a policy map head is used for the NN.
+     * @param is960 defines if 960 variant should be supported
      */
-    static void init_policy_constants(bool isPolicyMap);
+    static void init_policy_constants(bool isPolicyMap, bool is960);
 
 
 };

diff --git a/engine/src/environments/fairy_state/fairystate.h b/engine/src/environments/fairy_state/fairystate.h
@@ -111,7 +111,7 @@ class StateConstantsFairy : public StateConstantsInterface<StateConstantsFairy>
                                                     : string{char('a' + file_of(to)), '1', '0'};
         return fromSquare + toSquare;
     }
-    static void init(bool isPolicyMap) {
+    static void init(bool isPolicyMap, bool is960) {
         FairyOutputRepresentation::init_labels();
         FairyOutputRepresentation::init_policy_constants(isPolicyMap);
     }

diff --git a/engine/src/environments/open_spiel/openspielstate.h b/engine/src/environments/open_spiel/openspielstate.h
@@ -77,7 +77,7 @@ class StateConstantsOpenSpiel : public StateConstantsInterface<StateConstantsOpe
     static MoveIdx action_to_index(Action action) {
         return action;  // TODO
     }
-    static void init(bool isPolicyMap) {
+    static void init(bool isPolicyMap, bool is960) {
         return; // pass
     }
 

diff --git a/engine/src/environments/stratego_related/strategostate.h b/engine/src/environments/stratego_related/strategostate.h
@@ -68,7 +68,7 @@ class StateConstantsStratego : public StateConstantsInterface<StateConstantsStra
     static MoveIdx action_to_index(Action action) {
         return action;  // TODO
     }
-    static void init(bool isPolicyMap) {
+    static void init(bool isPolicyMap, bool is960) {
         return; // pass
     }
     static std::vector<std::string> available_variants() {

diff --git a/engine/src/state.h b/engine/src/state.h
@@ -207,9 +207,10 @@ class StateConstantsInterface
     /**
      * @brief init Init function which is called after a neural network has been loaded and can be used to initialize static variables.
      * @param isPolicyMap Boolean indicating if the neural network uses a policy map representation
+     * @param is960 Boolean indicating if the 960 variant shall be used for initialization
      */
-    static void init(bool isPolicyMap) {
-        return T::init(isPolicyMap);
+    static void init(bool isPolicyMap, bool is960) {
+        return T::init(isPolicyMap, is960);
     }
 
     /**

diff --git a/engine/src/uci/crazyara.cpp b/engine/src/uci/crazyara.cpp
@@ -62,11 +62,7 @@ CrazyAra::CrazyAra():
     useRawNetwork(false),      // will be initialized in init_search_settings()
     networkLoaded(false),
     ongoingSearch(false),
-#ifdef SUPPORT960
-    is960(true),
-#else
     is960(false),
-#endif
     changedUCIoption(false)
 {
 }
@@ -577,7 +573,7 @@ bool CrazyAra::is_ready()
         netBatches.front()->validate_neural_network();
         mctsAgent = create_new_mcts_agent(netSingle.get(), netBatches, &searchSettings);
         rawAgent = make_unique<RawNetAgent>(netSingle.get(), &playSettings, false);
-        StateConstants::init(mctsAgent->is_policy_map());
+        StateConstants::init(mctsAgent->is_policy_map(), is960);
         timeoutThread.kill();
         if (timeoutMS != 0) {
             tTimeoutThread.join();
@@ -653,12 +649,22 @@ void CrazyAra::set_uci_option(istringstream &is, StateObj& state)
     const string prevUciVariant = Options["UCI_Variant"];
     const int prevFirstDeviceID = Options["First_Device_ID"];
     const int prevLastDeviceID = Options["Last_Device_ID"];
+#ifdef SUPPORT960
+    const bool prevIs960 = Options["UCI_Chess960"];
+#else
+    const bool prevIs960 = is960;
+#endif
 
     OptionsUCI::setoption(is, variant, state);
+#ifdef SUPPORT960
+    const bool curIs960 = Options["UCI_Chess960"];
+#else
+    const bool curIs960 = is960;
+#endif
     changedUCIoption = true;
     if (networkLoaded) {
         if (string(Options["Model_Directory"]) != prevModelDir || int(Options["Threads"]) != prevThreads || string(Options["UCI_Variant"]) != prevUciVariant ||
-            int(Options["First_Device_ID"]) != prevFirstDeviceID || int(Options["Last_Device_ID"] != prevLastDeviceID)) {
+            int(Options["First_Device_ID"]) != prevFirstDeviceID || int(Options["Last_Device_ID"] != prevLastDeviceID) || prevIs960 != curIs960) {
             networkLoaded = false;
             is_ready<false>();
         }

diff --git a/engine/src/uci/crazyara.h b/engine/src/uci/crazyara.h
@@ -98,7 +98,7 @@ class CrazyAra
     bool networkLoaded;
     bool ongoingSearch;
     bool is960;
-    bool changedUCIoption = false;
+    bool changedUCIoption;
 
 public:
     CrazyAra();

diff --git a/engine/tests/tests.cpp b/engine/tests/tests.cpp
@@ -567,7 +567,7 @@ TEST_CASE("6-Men WDL"){
 #endif
 
 TEST_CASE("LABELS length"){
-    StateConstants::init(true);
+    StateConstants::init(true, false);
     REQUIRE(OutputRepresentation::LABELS.size() == size_t(StateConstants::NB_LABELS()));
     REQUIRE(OutputRepresentation::LABELS_MIRRORED.size() == size_t(StateConstants::NB_LABELS()));
 }