diff --git a/src/game/position.cpp b/src/game/position.cpp
index 7f9a73f5..9801b6f0 100644
--- a/src/game/position.cpp
+++ b/src/game/position.cpp
@@ -72,11 +72,6 @@ StateInfo::StateInfo(const StateInfo &state)
     *this = state;
 }
 
-Position::Position(const Position &pos)
-{  
-    *this = pos;
-}
-
 StateInfo::StateInfo(StateInfo &state)
 {
     if (position != nullptr) {
@@ -89,64 +84,18 @@ StateInfo::StateInfo(StateInfo &state)
     *this = state;
 }
 
-Position::Position(Position &pos)
-{  
-    *this = pos;
-}
-
 StateInfo &StateInfo::operator= (const StateInfo &state)
 {
     memcpy(position, state.position, sizeof(Position));
     return *this;
 }
 
-Position &Position::operator= (const Position &pos)
-{
-    currentStep = pos.currentStep;
-    moveStep = pos.moveStep;
-    memcpy(board.locations, pos.board.locations, sizeof(board.locations));
-    memcpy(board.byTypeBB, pos.board.byTypeBB, sizeof(board.byTypeBB));
-    currentSquare = pos.currentSquare;
-    winner = pos.winner;
-    startTime = pos.startTime;
-    currentTime = pos.currentTime;
-    elapsedSeconds[BLACK] = pos.elapsedSeconds[BLACK];
-    elapsedSeconds[WHITE] = pos.elapsedSeconds[WHITE];
-    move = pos.move;
-    memcpy(cmdline, pos.cmdline, sizeof(cmdline));
-    cmdlist = pos.cmdlist;
-    //tips = pos.tips;
-
-    return *this;
-}
-
 StateInfo &StateInfo::operator= (StateInfo &state)
 {
     memcpy(position, state.position, sizeof(Position));
     return *this;
 }
 
-Position &Position::operator= (Position &pos)
-{
-    currentStep = pos.currentStep;
-    moveStep = pos.moveStep;
-    memcpy(board.locations, pos.board.locations, sizeof(board.locations));
-    memcpy(board.byTypeBB, pos.board.byTypeBB, sizeof(board.byTypeBB));
-    currentSquare = pos.currentSquare;
-    winner = pos.winner;
-    startTime = pos.startTime;
-    currentTime = pos.currentTime;
-    elapsedSeconds[BLACK] = pos.elapsedSeconds[BLACK];
-    elapsedSeconds[WHITE] = pos.elapsedSeconds[WHITE];
-    move = pos.move;
-    memcpy(cmdline, pos.cmdline, sizeof(cmdline));
-    cmdlist = pos.cmdlist;
-    //tips = pos.tips;
-
-    return *this;
-}
-
-
 int Position::countPiecesOnBoard()
 {
     nPiecesOnBoard[BLACK] = nPiecesOnBoard[WHITE] = 0;
diff --git a/src/game/position.h b/src/game/position.h
index 2df405d4..cfbc9979 100644
--- a/src/game/position.h
+++ b/src/game/position.h
@@ -43,11 +43,8 @@ public:
     Position();
     virtual ~Position();
 
-    Position(Position &);
-    Position(const Position &);
-
-    Position &operator=(const Position &);
-    Position &operator=(Position &);
+    Position(const Position &) = delete;
+    Position &operator=(const Position &) = delete;
 
     Board board;