diff --git a/src/solanaceae/toxic_games/games/chess.cpp b/src/solanaceae/toxic_games/games/chess.cpp
index b79f569..05eb296 100644
--- a/src/solanaceae/toxic_games/games/chess.cpp
+++ b/src/solanaceae/toxic_games/games/chess.cpp
@@ -4,8 +4,9 @@
 
 Chess::ChessInstance::ChessInstance(
 	Chess& game_type_static,
+	uint32_t opponent,
 	uint32_t game_id
-) : _game_type_static(game_type_static) {
+) : _game_type_static(game_type_static), _opponent(opponent) {
 	_id = game_id;
 }
 
@@ -17,6 +18,41 @@ bool Chess::ChessInstance::allInvitesAccepted(void) {
 }
 
 void Chess::ChessInstance::onPacket(uint32_t from, const uint8_t* data, const uint32_t data_size) {
+	// test, auto resign
+	sendResign();
+}
+
+bool Chess::ChessInstance::sendResign(void) {
+	std::vector<uint8_t> pkg;
+
+	// resign (chess specific)
+	pkg.push_back(0xff);
+	return _game_type_static._tg.sendPacket(
+		static_cast<Contact3>(_opponent),
+		_game_type_static.getGameType(),
+		_id,
+		pkg.data(), pkg.size()
+	);
+}
+
+bool Chess::ChessInstance::sendMove(ChessCoords p0, ChessCoords p1) {
+	std::vector<uint8_t> pkg;
+
+	// move piece (chess specific)
+	pkg.push_back(0xfe);
+
+	pkg.push_back(p0.L);
+	pkg.push_back(p0.N);
+
+	pkg.push_back(p1.L);
+	pkg.push_back(p1.N);
+
+	return _game_type_static._tg.sendPacket(
+		static_cast<Contact3>(_opponent),
+		_game_type_static.getGameType(),
+		_id,
+		pkg.data(), pkg.size()
+	);
 }
 
 Chess::Chess(ToxicGames& tg) : ToxicGameI(tg) {
@@ -32,7 +68,7 @@ std::unique_ptr<Chess::InstanceI> Chess::createGame(std::vector<uint32_t> with)
 std::unique_ptr<Chess::InstanceI> Chess::acceptInvite(uint32_t from, uint32_t game_id) {
 	sendAcceptInvite(from, game_id);
 
-	auto new_instance = std::make_unique<ChessInstance>(*this, game_id);
+	auto new_instance = std::make_unique<ChessInstance>(*this, from, game_id);
 
 	return new_instance;
 }
diff --git a/src/solanaceae/toxic_games/games/chess.hpp b/src/solanaceae/toxic_games/games/chess.hpp
index c8a4eae..4a2d3a8 100644
--- a/src/solanaceae/toxic_games/games/chess.hpp
+++ b/src/solanaceae/toxic_games/games/chess.hpp
@@ -6,11 +6,17 @@ struct Chess final : public ToxicGameI {
 	Chess(ToxicGames& tg);
 	~Chess(void);
 
+	struct ChessCoords {
+		char L;
+		uint8_t N;
+	};
+
 	struct ChessInstance final : public ToxicGameI::InstanceI {
 		Chess& _game_type_static;
 
-		ChessInstance(Chess& game_type_static, uint32_t game_id);
+		const uint32_t _opponent;
 
+		ChessInstance(Chess& game_type_static, uint32_t opponent, uint32_t game_id);
 		~ChessInstance(void) {}
 
 		// TODO: just destructor?
@@ -24,6 +30,9 @@ struct Chess final : public ToxicGameI {
 		// ??
 		//virtual void tick();
 
+		private:
+			bool sendResign(void);
+			bool sendMove(ChessCoords p0, ChessCoords p1);
 	};
 
 	uint8_t getGameType(void) const override { return 1; };