Medium — logic-grid deduction puzzle
Four growers showed their apples in a row of stalls on a village common for Apple Day, and the clues reveal who had which stall and how many varieties each one brought.
On a crisp Saturday in October 1994, the village held its Apple Day on the common. Four growers, Edith, Walter, Joan and Peter, each set up a stall in one long row. The first stall stood by the gate and the fourth stood down by the pond. Each grower showed a different number of apple varieties, and every apple sat on its own little handwritten card: old russets, shiny pippins, and a few kinds that hardly anyone in Kent still grew. Gwen, who ran the day, wanted the big displays spread out so that no part of the row got too crowded. So for each stall, Gwen added up the varieties on the stalls right beside it and called that number the stall's neighbour tally. A stall at either end of the row had only one neighbour, so its tally was just the varieties on that one stall. By mid-morning the mist had lifted off the pond, the oaks were turning gold, and visitors in scarves and wellies were queuing for a taste.
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