Hitori Conquest

Hitori Conquest is a web home for Hitori, the Japanese number puzzle whose name means alone. It is run by Hey, Good Game, a small studio that makes and buys daily puzzle games, among them Sudoku Conquest, Queens Ultimate and Sumplete.

Every day there is a numbered 5x5 grid and a larger 8x8 that share a number (both were #144 on 29 October 2026). A weekly 18x18 runs from Monday, numbered 21 for the week of 26 October. The archive lists the last seven dailies by number and date for anyone, and a free account opens the older ones along with saved streaks, stats and leaderboards. An unlimited mode deals random grids in 5x5, 8x8, 10x10 and 12x12 for practice.

A puzzle starts as a grid full of numbers. You tap a cell to shade it out and tap again to circle it as one you know stays white. The goal is that no number appears twice in any row or column, no two shaded cells touch side by side, and all the white cells stay connected in one group. A timer runs above the board, and Hint, Check, Undo and Reset buttons sit below it. The 5x5 takes most people a minute or two. The 8x8 asks for longer chains of reasoning.

It suits Sudoku players looking for something that works the other way round (you remove numbers instead of adding them), and people who want a short daily logic warm-up with a streak to keep. A first-time tutorial walks you through the rules on a small grid before the daily opens.