An extract of the Sudoku Challenge! review by WiiWare World:
"Sudoku Challenge takes this game and places it on your Wii with motion controls. This is an obvious choice, because with 81 blocks and 9 numbers to choose from it is much more intuitive to be able to point and click than to have to scroll around with a conventional controller. The Wii Remote pointer works perfectly for this, so long as you have a steady hand and a properly calibrated setup. Young children and novices with the Wii Remote will likely have trouble pointing at such small targets, and so the interface could be a problem for Sudoku fans who are not regular Wii gamers. But for practiced Wii Remote pointers, the controls are intuitive and comfortable.
There is one problem with the layout, in that the numbers you input must be selected and dragged to the correct box, this seems a bit backwards to us. When playing the game, you find a box that you know should contain a certain number. But to place the number in the box, you must look away and find the number to drag back up. More than once we forgot which box we were dragging the number to and this bogged down game play as we checked and rechecked every choice. Had we been able to simply click on the box we wanted and then click on the number we wanted, game play would have moved at a faster pace and we would not have made so many errors placing numbers in the wrong box.
Errors, however, are not as big of a deal in Sudoku Challenge as they are in the paper and pencil game. This is because you can delete anything you want with the click of the trigger button. Furthermore, an 'Errors' button can be pressed at any time to highlight numbers that you have placed incorrectly. Alternatively, you can opt not to allow any wrong numbers to be input in the first place. This is a huge improvement over playing on paper as mistakes there can very often result in giving up on a puzzle entirely."
