Water Jugs
All gamesTarget 10 litres. Now jug 1 holds 0 of 11, jug 2 holds 0 of 13, jug 3 holds 0 of 15. 15 moves left, and the shortest route from here is 9. Cursor on jug 1. Nothing picked up.
Leave exactly 10 litres in one jug.
The shortest route from here is 9 moves and you have 15 left. The capacities 11, 13, 15 share no factor above 1, so every whole litre from 0 to 15 can be measured here.
With jugs of 11, 13, 15 litres the step is 1. Measurable: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 litres. Every whole number of litres up to the largest jug can be measured.
← → choose a jug · ↑ fills it from the tap · ↓ empties it down the drain · Enter picks a jug up, then Enter on another pours into it · Esc puts it back for free. Click the board first, or press Tab to focus it.