Chains: take every box you’re given

The lesson in words

A chain is a row of boxes where closing one gives the next one its third side. Once a chain is opened, one player can take every box in it, one after another.

Your opponent has just opened the top row.

Start at the open end.

Try it: Take the first box.

Keep going: you closed a box, so it’s your turn again.

Try it: Take the next box.

One more.

Try it: Take the last box.

Take every box in a chain, unless the double-cross is better. That’s next.