🧩 Level 4 - Puzzle #139
📊 Professional
⭐ Hard
📝 71 Steps
🔧 7 Techniques
🎯 Current State
Loading grid...
← Previous
Step 0 / 71
Next →
🔧 Techniques Used
Hidden Single
53×
Pointing/Claiming
8×
Naked Triple
4×
Naked Quad
3×
ALS-XZ
1×
Naked Single
1×
Naked Pair
1×
📋 Solution Steps
All
Singles
Locked
Subsets
Fish
Wings
Chains
Expand All
Collapse All
Loading steps...
← Previous
Level 4 Index
Next →