🧩 Level 4 - Puzzle #023
📊 Professional
⭐ Hard
📝 77 Steps
🔧 8 Techniques
🎯 Current State
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🔧 Techniques Used
Hidden Single
51×
Pointing/Claiming
13×
XY-Wing
4×
Naked Single
3×
ALS-XZ
3×
XYZ-Wing
1×
Swordfish
1×
Naked Quad
1×
📋 Solution Steps
All
Singles
Locked
Subsets
Fish
Wings
Chains
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