Shikaku Days

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One Shikaku a day for everyone: split the grid into rectangles that each hold one number equal to their area.

Play Shikaku Days

on shikakudays.com

Shikaku Days board for Oct 7, 2026: a six by six grid with number clues 6, 5, 3, 2, 8 and more, the timer running, and Undo, Hint and Clear buttons

Shikaku Days serves a single Shikaku puzzle each day, the same for every player. You drag across the grid to draw rectangles so that each contains exactly one number matching its area, with no gaps or overlaps. Your time, moves and hints are counted and compared on a daily leaderboard.

About Shikaku Days

Shikaku Days is a free web game devoted to Shikaku, the rectangle-dividing logic puzzle first published by the Japanese puzzle company Nikoli. Its makers describe it as a tribute to the puzzle, built for a daily routine.

A new puzzle is generated at midnight, the same for every player around the world. The page shows the date, a timer that starts when you tap to begin, and counters for moves and hints.

You drag across cells to draw a rectangle; each one must contain exactly one number, and that number must equal its area. Every cell must be covered, with no overlaps. Undo, clear and a hint button help when you get stuck, though hints are counted.

Times go on a global daily leaderboard, and players can join one of five teams to compete together. It suits anyone who wants a short, number-light logic puzzle each day with a bit of friendly competition.

How to play Shikaku Days

Open Shikaku Days and tap to start today's puzzle and its timer.
Drag across the grid to draw a rectangle around a number.
Make sure the rectangle's area equals its number and that it holds no other number.
Use undo or clear to fix mistakes, and a hint only if you are stuck.
Cover every cell to finish and see your place on the daily leaderboard.

Tips

Large numbers near walls usually have only one or two possible shapes, so place them first.
A 1 is always a single cell, and a prime number must be a single row or column.
Mark cells that only one number can reach before trying the open areas.