• License versions available for commercial web sites
• Contact www.trilliummarketing.net for licensing info.
• HTML and Javascript based
• Underlying code may not be modified

• Small or large fonts
• Borders and colors
• Control over options
• Easily translatable

• Naked and Hidden Subsets
• Block and Block Interactions
• Block and Row/Column Interactions
• X-Wings, XY Wings and Swordfish
• Colouring and Forcing Chains

Special thanks to Prof. Dr. Klaus Hermann for his insightful suggestions, encouragement and translation to German of this puzzle and Adam Gortych of Netoo.com for helping work thru translation issues and the translation to French.