Caro is a board game based on the popular Japanese strategy board game called Gomoku. It is also known in other versions as Five in a Row or Gobang. The game is played on a 15 x 15 grid or sometimes on a 19 x 19 grid, depending on the version.
Caro is somewhat similar to Tic Tac Toe except that the former requires the player to be able to create an unbroken row of five symbols whereas Tic Tac Toe is played on a 3 x 3 grid and only requires the player to create an unbroken row of three symbols to win.
This “Five in a Row” game is popular in many Asian countries but has also gained wide popularity all over the world. In Japan, it is known as Gomoku and in Vietnam it is called “Caro” or “Gomoku+”. In Korea, the game is known as “Omok” and in Great Britain it is popularly known as “Gobang”.
It was first introduced to the western world in the 19th century and remains to be a popular strategy board game until today.