Summary

This collection showcases a vast array of specialized number puzzles, extending far beyond standard Sudoku formats. Many options involve adding unique constraints based on cell relationships, such as directional indicators (Greater Than, Less Than) or patterned placements like Kropki and XV Sudoku.

The puzzle types explore geographical or positional limitations, including Hyper, Windoku, Samurai, and Jigsaw Sudoku. Further complexity is added with themes like Thermo, Arrow, Renban, and Palindrome Sudoku, requiring adherence to specific mathematical or sequential rules within the grid.

There are numerous constraint sets focusing on adjacent cell interactions, such as Anti-Knight, Anti-King, and Anti-Consecutive puzzles. The list also includes more advanced variants like Skyscraper, Little Killer, and various grid alterations, offering depth for puzzle enthusiasts.

Title

Play Sudoku Online - Free Puzzles Easy to Extreme | Sudoku.by

Description

Play free Sudoku puzzles online — Easy, Medium, Hard, Expert, Master and Extreme. Daily challenges, leaderboards, weekly competitions and 30+ variants at Sudoku.by.

NS Lookup

A 172.67.179.76, A 104.21.59.145

Dates

Created 2026-09-19

Updated 2026-09-29

Summarized 2026-10-12