A 9 by 9 array

From Reuters, via the New York Times website:

An Australian drugs trial lasting more than three months and costing taxpayers over A$1 million ($947,000) has been aborted after a number of jurors were found to have spent up to half the time playing Sudoku puzzles.

Sydney District Court Judge Peter Zahra cancelled the trial of two men on drugs conspiracy charges after the jury foreperson admitted that four to five jurors had been playing the addictive number sequence game, local media reported. The judge was alerted after some of the jurors were observed writing their notes vertically, rather than horizontally.

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