add debug macro

include/game_state.hpp

@@ -1163,6 +1163,22 @@ namespace Hanabi
         unsigned long id, Hanabi::probability_t probability
   )
   {
+    // This macro can be activated if we want to dump details on all game states visited for analysis purposes.
+#ifdef DUMP_STATES
+    std::cout << *this << std::endl;
+    const auto [id_parts, cards] = dump_unique_id_parts();
+    std::cout << "id is: " << id << ", id parts are: ";
+    for (auto const & part: id_parts) {
+      std::cout << part << " ";
+    }
+    std::cout << ", encoded cards are ";
+    for (auto const & part: cards) {
+      std::cout << part << " ";
+    }
+    std::cout << ", probability is ";
+    print_probability(std::cout, probability);
+    std::cout << "\n" << std::endl;
+#endif
     if (_position_tablebase.contains(id))
     {
       ASSERT(_position_tablebase[id] == probability);