Daily HitoriVerified

Daily Hitori strips the spatial puzzle genre down to its absolute, most mathematically pure and elegantly simple core, delivering a digital adaptation of a deeply complex Japanese logic puzzle that acts as the ultimate inverse to Sudoku. Set against a clean, visually minimalist grid completely filled with numbers, players are not tasked with adding numbers, but rather systematically eliminating them. Your objective is intensely focused: you must deduce which cells to paint black (eliminate) based on three brutal, unyielding rules. First, no number can appear more than once in any given row or column. Second, black cells cannot touch each other horizontally or vertically. Third, all remaining white (active) cells must form a single, continuous connected area. The atmosphere is deeply cerebral and intentionally demanding, requiring an intense level of forward-thinking and logical deduction, offering a fresh puzzle every single day. Daily Hitori is the ultimate brain-training routine for hardcore logic puzzle fans who demand pure mathematical rigor.

How to Play

• The primary objective is to paint cells black so that no row or column contains duplicate numbers.
• The board starts completely filled with numbers.
• Use your Left Mouse Button to click a cell to paint it black (eliminating it). Click it again to mark it with a circle (definitively keeping it white/active).
• Rule 1 (No Duplicates): No unpainted (white) number can appear more than once in a single row or column.
• Rule 2 (No Touching Black Cells): Two black cells CANNOT be adjacent horizontally or vertically (diagonals are fine).
• Rule 3 (Continuous White Area): All white cells MUST be connected to each other horizontally or vertically. You cannot isolate a white cell or a group of white cells from the rest of the board.

Tips and Tricks

• The "Sandwich" Deduction: If you see a sequence like "5 - 2 - 5" in a row, the middle "2" MUST be white. Why? Because if the "2" were black, both "5"s would have to be white (to satisfy the No Duplicates rule), but they would then be separated by a black cell, which might violate the No Touching rule depending on the rest of the board. More definitively, if a number is sandwiched between two identical numbers, the sandwiched number is always white.
• The "Double-Double" Deduction: If a row contains two pairs of identical numbers (e.g., two 4s and two 7s), and they are adjacent (4-4 or 7-7), one of each pair MUST be black. Because black cells cannot touch, the cells immediately adjacent to a pair (the cell to the left of the 4-4, and the right of the 4-4) MUST be white.
• Circle the Forced Whites: The moment you paint a cell black, you know for a mathematical fact that the four cells directly touching it (up, down, left, right) MUST be white. Mark them with circles immediately.
• The Corner Isolation Trap: Pay extreme attention to the corners. If you paint a cell black near a corner, ensure you are not trapping a white cell perfectly in the corner, isolating it from the rest of the board (violating Rule 3).
• Process of Elimination: This is not a guessing game. Every single black cell is forced by logic. If you are stuck, systematically re-evaluate every single row and column for duplicate numbers.