🧩 Level 4 - Puzzle #109
📊 Professional
⭐ Hard
📝 73 Steps
🔧 6 Techniques
🎯 Current State
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🔧 Techniques Used
Hidden Single
54×
Pointing/Claiming
8×
Naked Quad
5×
Naked Pair
4×
ALS-XZ
1×
Naked Single
1×
📋 Solution Steps
All
Singles
Locked
Subsets
Fish
Wings
Chains
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