Master Games with illegal moves!


The 4th one is not a specific move, just a funny story. Gligoric was playing against Bent Larsen. Gligoric made a move and walked away. He came back and saw Larsen's clock running but Larsen was not at the board. Gligoric thought that Larsen had made a move and forgotten to press the clock. Gligoric made his move. When Larsen came back to the game, he told the arbiter that Gligoric had made 2 moves in a row! Gligoric was allowed to take back the move.

Wow. It's funny how they have all the time in the world to calculate what they are going to play and then miss a simple check.

What are the rules for what should happen when a player makes an illegal move? I know in Shogi the player making the illegal move is supposed to thereby lose the game (but I don't know if this formally requires an opponent to call out the illegal move).

What are the rules for what should happen when a player makes an illegal move? I know in Shogi the player making the illegal move is supposed to thereby lose the game (but I don't know if this formally requires an opponent to call out the illegal move).
In slow games, 2 minutes get added to the opponent's clock. In blitz games, (not so sure about this) I think an illegal move is an instant loss.