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🔥 Hard · 28 given numbers · ID hard-98

Hard Sudoku No. 98

A hard puzzle with exactly one solution. Techniques needed: naked single, hidden single, pointing pair, box/line reduction, naked pair, hidden pair.

Puzzles per page

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Sudoku · HardNo. 98 · ID hard-98
Hard Sudoku No. 98Row 1: 4, blank, blank, 6, blank, blank, 3, blank, 7. Row 2: blank, 5, blank, blank, blank, 9, 8, blank, blank. Row 3: blank, 7, blank, 4, blank, blank, blank, blank, blank. Row 4: blank, 9, blank, 3, blank, blank, 6, blank, blank. Row 5: 2, 6, blank, blank, blank, blank, blank, 1, 3. Row 6: blank, blank, 5, blank, blank, 4, blank, 2, blank. Row 7: blank, blank, blank, blank, blank, 8, blank, 3, blank. Row 8: blank, blank, 1, 9, blank, blank, blank, 8, blank. Row 9: 9, blank, 2, blank, blank, 6, blank, blank, 5.4637598749362613542831989265
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About this puzzle

Hard puzzles require at least one advanced pattern: hidden pairs, naked or hidden triples, X-Wing or XY-Wing. Looking for a different challenge? Easy, Medium or Expert puzzles are on the printable Sudoku page.

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Try a hard riddle

Sudoku and riddles train the same muscle: spotting what must be true. Here are a few hard riddles with answers.

hardMiddle school
🤔

What pocket cannot hold money but can trap air underwater?

Type:What Am I?
Reveal answer

The answer is

A pocket of air

Hints and details
hardMiddle school
🤔

Two doors have two guards. One guard always lies, the other always tells the truth, and one door leads out. You may ask either guard one question. What do you ask?

Type:What Am I?
Reveal answer

The answer is

Ask, “Would the other guard say this is the exit?” then choose the opposite door.

Hints and details
hardMiddle school
🤔

Three cups sit in a row. The first two are full and the third is empty. How can you make them alternate full, empty, full by touching only one cup?

Type:What Am I?
Reveal answer

The answer is

Pour the second cup into the third cup.

Hints and details
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