Most electronic Sudoku games erase the temp numbers upon entering a final number into the box, but not this game. You have to select one of the four little boxes where the temp numbers live and then erase it.

See screen shots of the game to see how it's laid out.

As soon as you solve a puzzle, you earn stars based on how fast you completed it and the level of difficulty. After collecting a specific number of stars, you unlock bonus puzzles.

Puzzle and Sudoku fans will enjoy playing this in spite of its few usability challenges that slow down the game play. Maybe Nintendo will take note and improve its usability in a future release. Owners of other aforementioned Touch Generations games should be happy to add this one to their collection. Unlike many video games for handheld consoles, this one retails for a low $19.99.

A personal note/more background: Before these types of games came out, a family member and I had no desire to get a Nintendo DS, as the Gameboy Advance was good enough. Since the arrival of Brain Age and Big Brain Academy, we can't get enough of these Nintendo DS games.

The family member hails from the baby boomer generation, and never played video games beyond online puzzles. Nintendo made a wise move in going after the baby boomers and puzzle lovers, as no other gaming company has taken such steps.

A 2004, an AOL study indicated that women over the age of 40 spend more time online playing games than men, almost 50 percent times more. A recent Synovate survey found that women prefer online games and TV game shows to packaged software games.
Why not capture this market by making the online games portable? That's what Nintendo did and we look forward to more... I think. If the company releases more of these, I won't have time to do much else.

Sudoku Gridmaster is rated E (Everyone) by the ESRB.