🧩 Level 4 - Puzzle #025
📊 Professional
⭐ Hard
📝 88 Steps
🔧 9 Techniques
🎯 Current State
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🔧 Techniques Used
Hidden Single
52×
Pointing/Claiming
12×
ALS-XZ
8×
Naked Quad
6×
Naked Triple
3×
X-Wing
2×
Naked Pair
2×
2-String Kite
2×
Naked Single
1×
📋 Solution Steps
All
Singles
Locked
Subsets
Fish
Wings
Chains
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