Beginner
Levels 1-50
Small boards and forced placements — the beginner guide's ritual is enough.
Chiidoku Guides
Chiidoku (renamed Catdoku in October 2026) is a logic puzzle that combines Sudoku and Minesweeper elements: place exactly one token in every row, column, and colour region, never touching — even diagonally — with every board promising one logic-reachable solution. These guides carry you from the first 4x4 board to the campaign's documented level counts, daily-mission income, and endless-mode streaks.
The whole game in one paragraph
Chiidoku — the Roblox puzzle the official listing renamed to Catdoku on October 15, 2026 (same universe, place, and creator: group 290187465 of owner RoMcKim) — plays its modes off one ruleset. The listing's Levels row now says 'complete over 1,000 levels' with coins and win streaks rewarding consistent solving (September's wording said up to 400 Standard levels, banded Beginner through Hard by a community wiki); Ranked races other players on the same puzzle; Endless — no longer named in the listing text but still described by community wikis — generates random boards that grow harder with no fixed final level; and Daily Puzzles refresh every day with rewards. Mistakes cost hearts, wrong placements are the only real enemy, coins buy cosmetic characters that never change the grid, and — as of 2026-10-25 — no codes exist to shortcut any of it. Skill compounds; purchases do not.
| Mode | What is documented |
|---|---|
| Levels (formerly Standard) | The campaign ladder. The October 2026 listing says 'Complete over 1,000 levels, earn coins, set your best win streak'; its September 2026 wording said up to 400 Standard levels. The detailed difficulty bands below are the community wiki's September 2026 observation of that earlier ladder and are not re-verified against the expanded count. |
| Ranked | A race against other players on the same puzzle. Ranked rewards and matchmaking details are not published anywhere. |
| Endless | Randomly generated puzzles that become increasingly hard. The official listing dropped its Endless row in the October 15, 2026 description rewrite; community wikis still describe runs with no fixed final level that continue while you keep solving correctly, and recommend treating Endless as an accuracy challenge rather than a speedrun. |
| Daily Puzzles | A puzzle set that refreshes daily with rewards. The official listing does not name the rewards or the reset hour. |
Official listing rows, checked 2026-10-25; difficulty bands per chiidoku-wiki.wiki.
All guides
Pick the guide that matches today's problem
Each summary states what the guide covers and who it is for. Every guide child page was reviewed against current sources on 2026-10-25.
Start here
How to Play Chiidoku
The four placement rules in plain language: one token per row, per column, and per colour region, and no two tokens touching — including diagonally. The Catdoku listing (the game formerly named Chiidoku) words the tokens as Cats; before October 2026 they were Chiikawa characters. The guide also carries the official listing's promise that every puzzle has exactly one solution reachable through logic, and turns both into a first-board checklist you can run in order.
Best for: Brand-new players and anyone whose placements keep costing hearts
First sessionBeginner Guide
A first-session route through the small early boards: learn the loop on 4x4 grids before the boards grow, understand what coins and unlocks are for (collection, not power), and avoid the classic opening mistakes — grinding before checking rewards, and spending on cosmetics before the loop is comfortable.
Best for: Sessions one to five
Standard mode400-Level Campaign Guide
The campaign's documented shape: the October 2026 Catdoku listing says 'complete over 1,000 levels', replacing September's up-to-400-Standard-levels wording; the community wiki's difficulty bands (Beginner 1-50 through Hard 301-400) document that earlier ladder. The guide explains what the official count does and does not document — no level map, no per-level solutions — and how to progress through the bands anyway.
Best for: Planning the long climb through Standard
Daily routineDaily Missions Guide
Daily missions reset every day and award rewards per the official description — the cheapest reliable coin income in the game. This guide gives the four-step routine: open the mission panel first, note overlapping objectives, finish them inside your normal campaign session, and claim before the reset you can see in game.
Best for: Building the daily coin habit
Endless modeEndless Mode Guide
Endless generates random puzzles that get increasingly hard, with no fixed final level — a run continues only while you keep solving correctly. The guide rebuilds your scan routine around accuracy instead of speed: forced cells first, candidate marks for everything uncertain, and a hard stop when you catch yourself guessing.
Best for: Streak chasers and accuracy training
Mid gameProgression Guide
What advancing in Chiidoku actually means when characters are cosmetic: progression is solving skill, heart efficiency, and coin income. The guide maps checkpoint thinking onto the difficulty bands and tells you when a session should target missions, campaign bands, or endless streaks.
Best for: Players past the first 50 levels
EconomyFarming Guide
Chiidoku's documented coin sources — campaign clears, daily missions, endless streaks — measured as repeatable loops with targets and stop rules. Includes the honest caveat that no coin amounts are published by any source, so the guide teaches you to measure your own session yields instead of trusting invented rates.
Best for: Saving for unlockable characters
Difficulty map
Where the campaign's difficulty sits
The community wiki's band table for the 400-level campaign — the only documented difficulty breakdown that exists. Use it to choose which guide routine a session needs.
Easy
Levels 51-100
The transition bands — where the streak-protection checklist starts earning its keep.
Easy to Medium
Levels 101-150
The transition bands — where the streak-protection checklist starts earning its keep.
Medium
Levels 151-250
The transition bands — where the streak-protection checklist starts earning its keep.
Medium to Hard
Levels 251-300
The transition bands — where the streak-protection checklist starts earning its keep.
Hard
Levels 301-400
Long deduction chains — candidate marks and the endless-mode accuracy routine pay off here.
Source: chiidoku-wiki.wiki difficulty bands (posted September 2026), checked 2026-10-25.