Also known as:
Cross Purposes, Double Trouble
Two straight crosswords based on identical grids – but the two sets of Across and Down clues have been mixed up. The solver has to work out which clue belongs to which grid. Two pre-placed answers, one in each grid, provide the only starting point.
Counterpart answers share many of the same letters, so it pays to look ahead several clues and deliberate over the placing of answers.