Easy — logic-grid deduction puzzle
Four volunteers kept watch at a floodgate as the river rose.
Three days of rain had swollen the river, so Ivy, Leonard, Sylvia and Beryl came in for the evening watch at the floodgate. Each of them took a different station along the gate, and the checks went in order, from the first station to the fourth. Every station had its number, one to four, painted on a post beside it. Everyone grabbed a clipboard and pinned on a different badge. Before the work began, each of them tucked away a different snack to eat at the break. Outside, the water kept climbing.
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