Sudoku

How to Play

• Fill the 6 by 6 grid so every row, column, and 2 by 3 box uses 1 through 6 exactly once.
• Tap a cell, then tap a number. Red highlighting flags conflicts as you go.
• Finish the grid: 1000, minus 1 per second elapsed (up to 5 minutes) and 75 per mistake. A finished grid always scores at least 501. There are no hints.
• Unfinished grid: 20 points per correct cell (up to 500), minus 1 per second elapsed. Floor 0.

How It Is Scored

Finished: 1000 - seconds elapsed (cap 300) - 75 per mistake, floor 501. Unfinished: 20 per correct cell (cap 500) - seconds elapsed, floor 0. No hints.

The higher score wins. A tied score goes to the faster finish. Same score and same time: both stakes are refunded.

Entries

A daily tournament entry is $0.50.

Stakes are $0.60, $1.20, $3.00, $6.00, $15.00, and both players put up the same amount.