Sudoku: Killer on iqpi.io is Sudoku with cages and sums: play against a live opponent or in single-player. Free play, rated Buy-in in IQPIC, and Sudoku prize tournaments are available.
Created in the same form as classic: /game/create/sudoku → variant Killer. Plain Sudoku without cages: Sudoku.
Below — how Killer differs, how to create a game, and which settings apply.
Play runs in the personal account (lk).
Related: Sudoku, Rated games, Prize tournaments, Creating a tournament, Balance.
What this mode is
| Goal | Fill the grid by Sudoku rules and cage sums |
| Opponent | Live opponent or single-player |
| Match type | Unrated or Rated (Buy-in in IQPIC) |
| Tournaments | Yes — Sudoku, Killer variant |
| Skill rating | Same Sudoku category as classic |
On /game/create/sudoku, field Variant:
- Killer — this article;
- Classic → Sudoku.
UI tip: fill all cells with digits; in Killer, dashed cages show a small sum above each group.
No Stockfish-style bot mode. There is single-player.
Where to find what
| Area | URL | Purpose |
|---|---|---|
| Settings | /game/create/sudoku | Killer variant, size, difficulty, errors, time |
| Killer from home | /game/create/sudoku?variant=killer | Killer preselected |
| Solo | /game/create/sudoku?solo=1 | Single-player (pick Killer) |
| Room | /game/sudoku/{hash} | Same path as classic |
| Spectator | /game/sudoku/{hash}/guest | Watch |
| History | /history/battles | Games |
| Tournaments | /tournaments | Catalog |
| Balance | /lk/balance | Buy-in and winnings |
Create a match vs a person
- Open
/game/create/sudoku(or the home link withvariant=killer). - Set Variant to Killer.
- Set board size, difficulty, error limit, and game time.
- Match type: unrated or rated + Buy-in.
- Create →
/game/sudoku/{hash}. - Wait for an opponent or invite via challenge / link.
Fee details: Rated games.
Single-player
/game/create/sudoku?solo=1.- Variant Killer.
- Create and play immediately.
Solo is always unrated.
Form settings
Same fields as classic:
| UI field | Values |
|---|---|
| Variant | Killer (this article) |
| Board size | 6×6 or 9×9 |
| Difficulty | easy / medium / hard / expert |
| Error limit | 3, 5, or 10 |
| Game time | 1–60 minutes (default 15) |
Several difficulty levels train memory, focus, and logical thinking.
Sudoku: Killer rules
All classic Sudoku rules apply (row, column, block). Additionally:
- the board is divided into cages (dashed outline);
- each cage shows the sum of its digits;
- digits in a cage do not repeat and add up to that sum.
There are fewer (or no) given clues at the start — depending on generation at the chosen difficulty; you rely on cage sums and logic.
Duel win and error limit work as in classic Sudoku.
Tournaments
In Creating a tournament choose game type Sudoku and set variant Killer with board size, difficulty, error limit, and game time.
Catalog: /tournaments.