LatticeForge ✕
◆ LatticeForge Home 🔢 Solve 💡 Learn 🔮 Predict 🤝 Together ⋯ More 🧭 My Journey Teach the Cast Some of LatticeForge’s cast are still learning. When you teach them, YOU learn it best — catch what they get wrong, then quiz them.
✕ Teach Onlie You be the teacher — Onlie is still learning. Helping Onlie figure it out is the practice. (Onlie's progress stays on this device; nothing is sent anywhere.)
🎓 In a minute you'll be the teacher. Get ready to teach Onlie: the forced cell.
In a logic grid you never guess. Find the one spot a number is forced into because every other spot is ruled out.
Teach the connections
Show how the logic-grid puzzles connect You've helped them one at a time. The real understanding is how the ideas CONNECT — teach that next.
Onlie (Sudoku — the Latin-square rule: each number once per row, column, box) × Cage (KenKen — an arithmetic cage on top of a Latin square)
What rule does a KenKen (Cage) share with a Sudoku (Onlie) before its cages even matter?
The Latin-square rule — each number once per row and column; Cage adds arithmetic on top of Onlie's uniqueness None — KenKen only cares about arithmetic, never uniqueness They're the same puzzle with no added rule
Onlie then says: “In KenKen you can repeat a number in a row as long as the cage's math works out.” — is that right?
No — KenKen keeps Onlie's Latin-square rule: no repeats in a row or column, PLUS the cage target Right, repeats are fine if the math works
The link: KenKen = Sudoku's uniqueness rule + arithmetic cages — Cage stands on Onlie.
Latin square first, then make the cages add up.
Chevron (Futoshiki — < and > flags force the ORDER between neighbours) × Serra (Skyscrapers — edge clues count how many towers are VISIBLE)
A Skyscrapers clue says 'you see 3 towers from this edge'. How is that secretly a Chevron-style ordering clue?
Seeing a tower means all nearer ones are shorter — the visibility count encodes a chain of < inequalities, just like Futoshiki Visibility is about counting only; it has nothing to do with order Skyscrapers and Futoshiki share no reasoning
Chevron then says: “A Skyscrapers visibility clue tells you the exact heights directly, with no ordering reasoning.” — is that right?
No — the count encodes ORDER (nearer must be shorter to be blocked); it's Chevron's inequality logic in disguise Right, it gives exact heights
The link: both puzzles are Latin squares cracked by ordering — one states the inequalities, one hides them in a view.
Order the cells — stated, or seen.
Capstone — solve one puzzle pack together Three grid puzzles, three deductions. Bring in the cast member for each.
Fill so each number appears once per row, column, and box. Who?
Who do you bring in?
Onlie — Sudoku's Latin-square uniqueness Cage — KenKen arithmetic Lasso — Slitherlink loop
Fill a fenced region so its numbers hit the target with the given operation. Who?
Who do you bring in?
Cage — KenKen's arithmetic cage Onlie — Sudoku uniqueness Vega — Star Battle
Read edge numbers telling how many cells fill each run, then fill the overlap. Who?
Who do you bring in?
Pica — Nonogram run-length deduction Chevron — Futoshiki inequalities Umbra — Hitori elimination
The synthesis: enforce uniqueness, satisfy the cages, and deduce from the run clues — three grids, one logical habit: find the forced move.
Unique, caged, counted — every grid hides one forced move.
Try it in the puzzle tools →
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Font Default OpenDyslexic Book
Reading tools Reading ruler Focus mode Read aloud Bigger tiles
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Game look Usual Bigger and calmer
Same ideas with a younger band's look: bigger type and buttons, a rounder font, slower motion. For any child who wants it.
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