Shikaku+ Open app

Shikaku+

Complete squares with friends.

Play now
Daily Shikaku

New puzzle every day, at 6:00 AM Philippine Time.

Changelog

Latest July 1, 2026

Badges

  • Badge system is live. 30+ badges across Special, Foundation, Supporter, and gameplay tiers.
  • Earn badges automatically by clearing boards in any mode. Open your Account to claim progress you've already made.
  • Equip a badge by tapping it on the Account screen. Foundation and Master badges are hidden until earned.

Player Tags

  • Every registered account gets a 6-character tag (e.g. #AB12CD). Shown on the Account screen — tap to copy.
  • Help Me! and Let Me Help! links now use tags instead of raw usernames. Opening a friend's link shows their current name and badge.

Fixes

  • Daily Puzzle: R key no longer resets the board. Reset and New Puzzle disabled for Daily.
  • Badge list redesigned with proper plates and spacing.
  • Anonymous accounts can no longer earn or equip badges.

About Shikaku+

Shikaku+ is a cooperative and competitive puzzle platform built on the Nikoli puzzle, Shikaku.

The core mechanic is simple: partition a grid into rectangles so each rectangle contains exactly one number, and the rectangle’s area matches that number.

Read more →

About Shikaku Hokan

I thought, Shikaku was hard enough. How can we make it harder?

Then, I thought about making constraints in the game, and we came up with an alternate version of classic Shikaku.

There’s some given blocks across the board, but now we’ve taken the numbers and it’s your game to make these numbers fit in the board now.

Now, the game turned from just “complete the squares” to “how can you make the Targets fit the board”

From analysis to deduction. It’s pretty clean, you should try it!

Support Us

$25 raised

of $500 goal

  1. $500
    Full client-side customization Locked
    A separate add-on to the game where you can customize the full Shikaku experience.
  2. $300
    Replay System Locked
    Advanced playback controls of your games, and your friend's games! See how they look at… squares! Or something.
  3. $200
    Friend System Locked
    For a game so geared towards friendship and love, we'd want to give you a robust backend to make sure you share your best clears.
  4. $100
    iOS App Store Launch Locked
    Unlocking the iOS App Store launch allows for even more of your friends to enjoy Shikaku+ anywhere. (Covers Apple’s $99/year developer fee.)
  5. $25
    Google Play Store launch Unlocked
    We all have to start somewhere, and Google Play kicks things off for our mobile takeover.

Roadmap

  1. v0.1 Shipped
    Shikaku+ was born
    Classic mode, deterministic puzzle engine
  2. v0.2 Shipped
    Help Me!
    Let Me Help!
    Zero-backend co-op, shared by link
  3. v0.3 Shipped
    Shikaku Hokan
    Anchors on the board, and you fill in the blanks with Targets.
  4. v0.4 Building now
    Time Attack
    Blitz
    Tekazu
    Same engine, more Shikaku fun.
  5. v1 Building now
    Accounts
    Save your progress and log in in any device forever.
  6. v2 Planned
    Shikaku+ VS
    Shikaku AGAINST friends. You've solved together, now it's time for war.
  7. v3 Planned
    Shikaku Mosaic
    Daily collaborative puzzles with your friends, family, your boss, and your cat, together.

Your support, rewarded

Get an exclusive early supporter badge when you support the game. This badge will be visible in public rooms, Help Me! and Let Me Help!, and (soon) in Shikaku+ VS!

Foundation ★
Donate any amount in the beta stage!
Foundation ★★
Donate at least $5!
Foundation ★★★
Donate at least $20!
Foundation ★★★★
Donate at least $50!

These badges are minted once and never again — once the Foundation period closes, there's no way to get them.

Early support ends in
10 days
09 hours
30 minutes
37 seconds
The Foundation fundraiser wraps up at the end of August 2026. Support before then to lock in your tier rewards and exclusive badge.