<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>SudokuDay</title><link>https://sudokuday.co.kr/en/</link><description>Play free online Sudoku puzzles from easy to hard, with notes, hints, undo, resume, and daily streak tracking.</description><language>en-US</language><lastBuildDate>Tue, 08 Sep 2026 02:42:01 GMT</lastBuildDate><item><title>Free Sudoku Online - Daily Sudoku Puzzle | SudokuDay</title><link>https://sudokuday.co.kr/en/</link><description>Play free 9x9 Sudoku online with no sign-up. The daily puzzle changes by date, your progress is saved in this browser, and unlimited easy, medium, and hard practice puzzles are available after the daily challenge.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/</guid></item><item><title>Easy Sudoku Online - Free Beginner Puzzle | SudokuDay</title><link>https://sudokuday.co.kr/en/easy/</link><description>Play easy Sudoku online for free. These beginner-friendly 9x9 puzzles have more given numbers, so you can practice rows, columns, boxes, single candidates, notes, hints, undo, and auto-save.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/easy/</guid></item><item><title>Medium Sudoku Online - Free 9x9 Puzzle | SudokuDay</title><link>https://sudokuday.co.kr/en/medium/</link><description>Play medium Sudoku online for free, no account required. Practice candidate notes, hidden singles, locked candidates, pointing pairs, hints, undo, and browser auto-save.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/medium/</guid></item><item><title>Hard Sudoku Online - Free Advanced Puzzle | SudokuDay</title><link>https://sudokuday.co.kr/en/hard/</link><description>Play hard Sudoku online for free. These challenging 9x9 puzzles are useful for practicing naked pairs, box-line reduction, candidate chains, notes, hints, undo, and logical solving.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/hard/</guid></item><item><title>Sudoku Rules - How to Play Sudoku | SudokuDay</title><link>https://sudokuday.co.kr/en/guide/rules/</link><description>Learn the basic Sudoku rules for rows, columns, and 3x3 boxes. Sudoku does not require math; fill the empty cells with digits 1 through 9 so every row, column, and box contains each digit once.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/guide/rules/</guid></item><item><title>How to Solve Sudoku - Beginner Strategy Guide | SudokuDay</title><link>https://sudokuday.co.kr/en/guide/strategy/</link><description>Learn how to solve Sudoku step by step with single candidates, hidden singles, candidate notes, locked candidates, and a clear solving order for beginners.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/guide/strategy/</guid></item><item><title>About | SudokuDay</title><link>https://sudokuday.co.kr/en/about/</link><description>SudokuDay is a free online Sudoku game you can start without logging in or signing up. Core pages are static HTML, game progress is stored in localStorage, and daily plus difficulty-based practice modes are available.</description><pubDate>Sun, 09 Aug 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/about/</guid></item><item><title>Advertising | SudokuDay</title><link>https://sudokuday.co.kr/en/contact/</link><description>Advertising inquiries and contact information for SudokuDay. Contact us via email for banner ads and business inquiries.</description><pubDate>Tue, 08 Sep 2026 12:00:00 GMT</pubDate><guid isPermaLink="true">https://sudokuday.co.kr/en/contact/</guid></item></channel></rss>