Puzzle Fuel University
Learn the puzzles.
Interactive lessons that take you from the rules to whatever's hardest. Earn fuel cells for everything you complete — bank 2,500 to unlock The Archives, with bigger rewards on the way.
Tracks
Sudoku
OpenFrom the three rules to Diabolical, twenty lessons.
20 / 20 lessons · open
Killer Sudoku
SoonCages, sums, and the rules underneath.
0 / 8 lessons · coming soon
Mini Crossword
SoonHow to read a grid, fill the corners, finish faster.
0 / 6 lessons · coming soon
Word Ladder
SoonLetter at a time. Find the shortest path.
0 / 5 lessons · coming soon