🧩 3D Sudoku Backtracking Tower — Volumetric Search Visualizer
The exact same backtracking algorithm as the 2D original — find the first empty cell, try digits 1–9, check row/column/3×3-box validity, recurse, undo on a dead end — now rendered as a real 3D tower where a cell's digit value becomes its height. Orbit the camera to watch the search climb and collapse from any angle.
This is the 3D companion to the Sudoku Solver — Backtracking. It runs the identical algorithm — scan for the first empty cell, try digit 1 through 9, accept a digit only if it doesn't already appear in that row, column or 3×3 box, recurse into the next empty cell, and undo (backtrack) the moment every digit fails — but the board is rendered as a volumetric tower: each of the 81 columns rises to a height equal to its placed digit's value, fixed clue cells render as static gray pillars, and cells the solver is actively trying or unwinding pulse amber and red before settling to blue, then green once the whole grid is solved. Empty cells show a faint lattice of nine candidate slots (toggle it off to declutter), one at each possible digit's height, so the search's climb through the solution space reads as a genuine third dimension rather than a decorative wrapper.
3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install