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Box/Line Reduction

Advanced

When candidates in a row or column are confined to a single box

💡 How to spot it: If a number in a row/column can only appear within one box, eliminate that number from other cells in that box.
Puzzle 1 of 3

Other Techniques:

🎯 Naked Single 🔍 Hidden Single 👯 Naked Pair 🔮 Hidden Pair ➡️ Pointing Pair

More ways to play:

🏆 Daily Tournament 💣 Time Bomb 🎮 Classic Mode