You can probably get a bumper book of Sudoku puzzles for about £4.99. If this sounds like great value for money and very, very exciting then Go! Sudoku’s blend of Sudoku puzzles and elevator music will no doubt have you in raptures.

If not, steer well clear because this is the sum total of the game’s meagre rations. There are no spins on the formula – no wacky bonuses or multiplier thingies or anything like that. This is just pure Sudoku.

There’s a rudimentary tutorial and training mode as well as multiplayer both on a single PSP and via Wi-fi – everything a Sudoku otaku could ever want. Great for purists, less fun for casual players, or those who have quickly realised that Sudoku is a crushingly boring endeavour.

Perhaps that’s a little harsh, but we’re not Sudoku otaku – we’re gamers used to mini-games and unlockable extras and there’s no reason why Go! Sudoku couldn’t have explored this. Think of Tetris and the multitude of subtle and not so subtle twists that have been worked into it over the years.

The rub is that pen and paper is no more technical than Sudoku needs to be unless you’re going to thoroughly explore gimmicks – you can jot down workings, write a poem in idle moments and you can find bliss on the puzzle pages of your daily paper. Sony should have left the Sudoku cash-ins to Vorderman.