DAILY PUZZLE, on the home screen, opens today's puzzle. It changes at midnight, on your phone's clock, and is made on the phone: it works offline.
Win by forcing
The board is 15×15. You play X and must win in a set number of moves. Every move must threaten five in a row, so that your opponent has only one possible block. The game plays that block for you.
The length follows the week: 3 moves on Monday and Tuesday, 4 from Wednesday to Friday, 5 at the weekend. Any correct solution is accepted.
A wrong move
A move that does not threaten five lets your opponent take over; a line that does not win in time runs into the defence. TRY AGAIN starts over. Show the move gives the answer.
Your streak
Each day solved without help adds one to your streak. A puzzle solved with Show the move counts as done, but the streak does not grow. A day missed sets it back to zero.