TesseraDig

Twenty mosaic floors buried under a site. The only thing you are given is the numbers written in the margin. Each number is one unbroken run of tesserae in that line, in order, with at least one bare square between runs. Tap to set a tile. Switch mode and tap to rule a square out. Both are claims about what is down there - get either one wrong and it costs a strike, and the square then shows you the truth. NO DIG EVER NEEDS A GUESS This is the promise, and it is checked rather than asserted. Every mosaic was run through a solver that is only allowed to apply constraint propagation - never a coin flip - and kept only if that alone finishes the picture. Six of the original drawings were thrown out for stalling and redrawn. If you are stuck, there is something left to read, not something left to gamble on. TWENTY MOSAICS From a five-by-five warm-up to ten-by-ten floors. Each is named for what it turns out to be, and the name is never shown before you lift it - working out what you are looking at is half of why anyone digs. FOUR TOOLS Sift settles one square the clues already decide - a real deduction from your own position, so it will honestly tell you when nothing is forced yet. Brush takes back your last call. Plumb settles the line with the most still buried. Mend buys back a strike, though the record still shows it. A TOOLSHED Four permanent tracks - an extra strike, better score, free Sifts, richer pay - three tiers each, drawn for the next dig you open. Plus eight citations, a daily allowance that grows with a streak, and a journal of your last twenty digs. MADE TO BE LEFT ALONE WITH No timers. No lives. No energy meter. No network, no accounts, no ads, no analytics, no tracking of any kind - the whole game lives in one file on your device and nothing about you leaves it. ACCESSIBILITY A cut-stone grain on every set tile so filled reads apart from crossed without colour, a reduced-flash mode, spent clues that grey themselves out, an optional count of what is still buried, and a warning on your last strike.