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Sudoku One of each in every row, column, and box — find the forced cell by logic, never a guess. 
KenKen Latin grid plus arithmetic cages — every caged group must hit its target with no repeats. 
Nonogram Paint the hidden picture — each number is a run of filled squares. Pure deduction. 
Kakuro A number crossword — fill each run to its clue with no repeated digit. Sums are the clue. All activities
Solve a puzzle
Sudoku One of each in every row, column, and box — find the forced cell. KenKen One of each per row and column, Small 4×4 to Full 6×6, and every caged group hits its arithmetic target — by logic, not guessing. Nonogram Paint the hidden picture, Small 5×5 to Full 10×10 — each number is a run of filled squares in that row or column. Pure deduction. Futoshiki A Latin grid with more-or-less signs, Small 4×4 to Full 6×6 — each number once per row and column, every ‹ › opening toward the bigger number. Order is the clue. Kakuro A number crossword — fill 1–9 so every run adds up to its clue with no repeated digit. Sums are the clue. Skyscrapers Heights one of each per row and column, Small 4×4 to Full 6×6 — each edge number is how many buildings you can see from that side. Sightlines are the clue. Binairo Fill every cell 0 or 1, Small 6×6 to Full 10×10 — as many of each per row and column, never three alike in a row, and no two rows or columns the same. Balance and parity are the clue. Slitherlink Lasso's puzzle: draw one closed loop between the dots. Each number says how many of its four sides the loop uses. No branches, no loose ends. Star Battle Vega's puzzle: put the set number of stars in every row, column and region — and no two stars may touch, not even at a corner. Hitori Umbra's puzzle: shade out repeats so no number shows twice in a line — shaded squares never touch, and the rest stay joined up.
Practice & learn
Concepts — the rule behind the puzzle The reasoning behind each puzzle family — the one rule that makes every cell fall into place. Predict the Cell Call the forced cell — or the rule — BEFORE the reveal, then find out why a guess is never needed. Constraint Cascade Scan the whole grid: predict how many cells you can place RIGHT NOW, then watch the forced ones fall into place. Not every blank is ready yet — find the ones that are. Same rule, new grid Watch one rule crack a Sudoku, then spot the SAME trick in a Futoshiki or Binairo — every grid hides one rule. Mixed Practice Mixed practice shuffles two or more concept kits together. LatticeForge has one kit so far, so this opens when the second one lands. Puzzle Rush A calm minute on what you already know — the clock counts up, stop whenever you like, no penalty for a miss. Trick Questions Reasoning traps with a twist — spot why the obvious cell is wrong. Teach the Cast Teach a rule to a cast member still learning it. Saying it is the practice.
Play together
Puzzle Duel 2–4 solvers take turns on one device — same puzzle, then compare how each of you saw it. Lattice Quest — the map A progression trail through every puzzle family. Clear each stop of real practice, then move on. Progress Your levels, the days you've practised, and how each puzzle family is coming along — saved on this device.
Concept library — the rule behind every puzzle family
More ways to play
😄 Brain break
Meet the cast — the characters who teach this
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Onlie Sudoku -
Cage KenKen -
Kaku Kakuro -
Pica Nonogram/Picross -
Chevron Futoshiki -
Umbra Hitori -
Serra Skyscrapers -
Lasso Slitherlink -
Vega Star Battle -
Ada Mentor host — keeps the puzzle guild; teaches 'every grid hides one rule — find the forced cell, never guess'
Ensemble stories — the cast together
What next? Pick a door
- More like this WitQuest Can your wits beat the villain? EscapeForge Which clue opens the lock? DeduceQuest What is the hidden code?
- A bit harder JigsawForge What does your piece of evidence add? ReckonQuest What is the unknown in this problem? CubeSensei Which move undoes that sequence?
- Something different DanceQuest Can you build an eight-count phrase? ThreadForge Which causes tangled together here? ReadQuest What did the passage really say?