Ready to put the hidden triple technique into action? This page is designed for you to practice and master hidden triples with real Sudoku puzzles.
Every board above is a position from a real puzzle where the Hidden Triple is the next step. Tap the candidates it removes (or select a cell and press the digit) and press Check. If you’re stuck, Show me gives the answer and Next puzzle loads another. Want to watch one first? Switch to Worked example.
Quick Reminder: What is a Hidden Triple?
A hidden triple occurs when three numbers are candidates in only three cells within a row, column, or box—even if those cells have other candidates. When you spot a hidden triple, you can eliminate all other candidates from those three cells.
Want a full step-by-step guide? Read the Hidden Triple technique article
How to Practice
- Look for three numbers that appear as candidates in only three cells within a house (row, column, or box).
- Remove all other candidates from those three cells.
- On the board, tap each of those candidates to remove it.
- Press Check. On your first try you see how many you found; on the second, the ones you missed get a dashed ring.
Start Practicing on Full Puzzles
Once you can find the Hidden Triple on most boards without pressing Show me, take it into a full game. Hard puzzles are where this technique starts to come up, and the step-by-step solver will name the technique each time you get stuck.