Hard — logic-grid deduction puzzle
Use what the operators remember to work out who watched each shaft, with which snack and which badge.
At six o'clock, the whole tower wanted to go home at once. Down in the control room, the call buttons blinked faster than anyone could count, and the lifts raced up and down without a break. The four shafts ran side by side in a row, each with its number painted on the door: the first shaft was number one, the second was number two, the third was number three and the fourth was number four. Lorna, Emile, Sanjay and Freya each watched one of them, with a coloured badge clipped on and a snack close at hand. By the time the rush died down, nobody could remember who had sat where. Now Freya has the night log to fill in and needs your help to get it right.
Read the clues, rule out what cannot be, and prove what must be. Every GRIDIGMA puzzle is verified by a solver that shows the reasoning behind each step, so a solution is never a guess.
Logic grid puzzles: how to solve them, with a worked example