Quarry Sweep

Quarry Sweep is a calm logic puzzle set on a small 3D quarry floor covered in stone slabs. Some slabs are cracked. Lift a sound slab and a number appears: it tells you how many cracked slabs touch that spot, corners included. Mark every crack, lift everything else, and the dig is cleared. Around the board sits a little quarry diorama with terraces, a crane and workers.

Every dig is generated and then checked by a solver so it can be finished by logic alone, with no guessing. The dig starts with a pocket of slabs already lifted, and where the solver would otherwise get stuck, a survey stake marks a slab the surveyors already checked. Lifting a cracked slab costs one of three hard hats; lose all three and the floor gives way. A dig earns one star for clearing it, two for clearing it without losing a hat, and three for doing that without tools as well. Tap a number whose cracks are all marked and every other slab around it lifts at once.

The campaign has 120 digs across eight quarries of fifteen, and the last dig of each is a big dig. Each quarry adds a new kind of stone. Sandstone Steps brings boulders that never hide a crack and give the board new shapes. In Fossil Beds, numbers on shell plates count only the four straight neighbours. Frost Hollow has frozen slabs that are safe but hide their number. Copper Ledger puts posts on the rim that count the cracks in a whole row or column. Mortar Seams joins pairs of slabs that are both cracked or both sound. Lantern Deep has lantern stones that count along straight lines until a boulder or the edge. Crystal Crown mixes every rule on the largest boards.

A few tips: start where the numbers are smallest, because a low number rules out the most slabs. Mark cracks as soon as you are sure, then use the number tap to clear around them quickly. When one clue is not enough, compare two neighbouring numbers that share slabs. If you are stuck, the lamp lifts one slab that can be proven sound, and the chisel tests any slab safely, though either one costs the third star.

Gems from star rewards and geodes hidden under some sound slabs buy lamps, chisels, stone styles, markers and hard-hat colours in the workshop. A Daily Dig brings one new board each day, the same for everyone, with a streak counter.

There is no time limit, only a best time to beat. It plays with mouse, keyboard or touch, in portrait or landscape.

Use the numbers to work out which slabs must be cracked and which must be sound. Flag the cracks and lift the rest. When every crack around a number is flagged, click that number to clear everything around it at once.

The quarry is cleared when every sound slab has been lifted. The clock is running, so playing both carefully and quickly raises your score. If you are new to the game, warm up on Small before moving on to Medium and Large.