note-ku

NOTE-KU – Full Project Summary

What NOTE-KU Is

A branded sudoku method, app, and book series. Core concept: use only notes until every empty cell has exactly one candidate, then fill the board in one final sweep (Final Pass). Marketing line: "There is no difficulty level at which the notation approach breaks down — a harder puzzle simply requires more iteration passes, not a different method."

Brand identity: Ink black #0C0C0C, Red #B91C1C, Cream #F5EFE0, Gold #D4AF37. Fonts: Georgia (serif), Courier New (mono). Brand mark: large italic red N inside a red-bordered black square. Website: note-ku.com

The Method (Three Phases)

note-ku

import { useState, useEffect, useMemo, useCallback, useRef, memo } from "react";

window.storage = {
  get: (key) => Promise.resolve({ value: localStorage.getItem(key) }),
  set: (key, value) => Promise.resolve(localStorage.setItem(key, value))
};

// ═══════════════════════════════════════════════════════
// THEMES — 9 total, dramatically improved contrast
// Key fix: each dark theme now uses a COMPLEMENTARY accent