🧩 Level 4 - Puzzle #398
📊 Professional
⭐ Hard
📝 73 Steps
🔧 5 Techniques
🎯 Current State
Loading grid...
← Previous
Step 0 / 73
Next →
🔧 Techniques Used
Hidden Single
49×
Pointing/Claiming
12×
Naked Pair
7×
Naked Single
4×
XYZ-Wing
1×
📋 Solution Steps
All
Singles
Locked
Subsets
Fish
Wings
Chains
Expand All
Collapse All
Loading steps...
← Previous
Level 4 Index
Next →