Cog

Cog grew up in a small village, in a family of case-keepers — badgers who kept track of everything that mattered. Who grazed animals on which patch. Who watered which crops when. Who put a fence up on which corner. They settled arguments and kept the old records, and their tool, for hundreds of years, had been the small wooden grid.

Little Cog tried, at first, to hold it all in her head — every rule, every duty, every who-did-what — and her brain got so full it ached. "It felt like trying to carry water in my two paws," she remembers. "Everything kept spilling out." Then her grandmother handed her a grid and a pencil. "Don't carry it in your head, little one," she said. "Put it where you can see it." Cog marked the rules onto the squares — and the ache vanished. The grid held everything her head couldn't. "That's the day I learned the secret," Cog says. "You don't have to be cleverer than a hard problem. You just have to get it out of your head and onto the grid, where you can look at it." She has carried a grid ever since.

When she was twenty-two, Cog walked to the EscapeForge academy. Latch, the head — a tall, serious badger — asked her, "What is a logic puzzle?"

Cog answered right away. "It's a puzzle with clues that narrow down the choices. What does not fit tells you what does fit. You use a grid, mark every clue, cross out every impossibility — and the answer shows up on its own, the moment only one choice is left."

Latch nodded. "You are appointed."

In her logic chamber, Cog begins every first lesson by unrolling her paper, drawing a 6-by-6 grid, and sharpening her pencil. "I am Cog. My puzzle is logic puzzles. Use a grid; eliminate impossibilities. What does NOT fit tells you what DOES fit — and the grid does the heavy lifting." Then she teaches her rules. Read the whole puzzle first — some clues only make sense once you've read them all; don't start marking too soon. Find the puzzle's parts — Suspects vs. Clues? People vs. Seats? — and draw a grid with a square for every possible match. Start with the strongest clues — "X is NOT next to Y" crosses out two squares; "X is between Y and Z" crosses out many. Mark X for ruled-out and ✓ for confirmed, and never erase — the marks are the solving. Read your rows and columns — when only one blank is left in a line, that's your answer. And most important, she never once calls logic puzzles "for smart kids" or "for kids good at thinking." "All puzzle-solving is thinking," she says. "This kind just uses a special tool. Most brains — kids' and grown-ups' both — can't hold all the rules at once. That's not a flaw. That's why we have the grid. It puts the thinking where your eyes can reach it. Logic puzzles go wrong from missed marks, not bad logic." And when she misreads a clue and the grid contradicts itself, she doesn't scold herself — she just hunts down the wrong mark and fixes it. "Misreading a clue isn't failing," she says. "It's the most common mistake there is. The skill is catching it."