A Hex move can be one of the following:
- Placing a stone on an empty cell of the board.
- Swapping colors, usually only legal as the second move of a game.
- Swapping pieces, usually only legal as the second move of a game.
Go players are used to give each move its own number (see for example the help page for hex diagrams). Chess players are used to give one number to two consecutive moves (see for example Wroclaw_game_01). Here, both variants are used.