Go (game)
The playing pieces are called "stones". One player uses the white stones and the other, black. The players take turns placing the stones on the vacant intersections ("points") of a board. Once placed on the board, stones may not be moved, but stones are removed from the board if "captured". Capture happens when a stone or group of stones is surrounded by opposing stones on all orthogonally-adjacent points. The game proceeds until neither player wishes to make another move. When a game concludes, the winner is determined by counting each player's surrounded territory along with captured stones and komi (points added to the score of the player with the white stones as compensation for playing second). Games may also be terminated by resignation. A teacher might simplify the explanation by saying to a student "you may place your stone on any point on the board, but if I surround that stone, I will remove it."
Gobblet
The game is played on a 4×4 board. Each player has 12 pieces of the same colour but different sizes. Players take turns to place a piece on the board or move their piece that already is on the board. Bigger pieces can be placed so that they cover smaller ones. A player wins by placing four pieces of the same colour in a horizontal, vertical, or diagonal row.