Candidates:
- Tap one of the three candidate buttons (top, middle, bottom) to lock that mode, then tap digits to pencil them in. Tap the button again to go back to placing digits.
Keyboard shortcuts (optional, on a computer):
- Ctrl = candidates bottom
- Shift = candidates middle
- Ctrl+Shift = candidates top
- Numpad: * = Shift, / = Ctrl, - = Shift+Ctrl
Check solution
Checking the solution makes this game ineligible for future highscores.
Do you want to continue?
Difficulty is the main tier of the progression.
Rookie: the basic techniques.
Apprentice: intermediate, with pair and reduction techniques.
Enthusiast: more advanced techniques involving triples.
Specialist: builds on the basics and requires the named Specialist technique for the sublevel.
Technician: needs at least two Specialist breakthroughs in the same puzzle, in three tiers:
Tier 1: X-Wing, Y-Wing, Unique Rectangles, Chute Remote Pairs and BUG+1.
Tier 2: Tier 1 plus Swordfish, XYZ-Wing, Simple Colouring and W-Wing.
Tier 3: Tier 2 plus Rectangle Elimination, Finned X-Wing and Unique Rectangles II.
A higher track generally means more advanced logic.
Beta
Summary
This game was so long that its earliest steps were not kept.