Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now
Aza

 98 Two doors with two guards - one lies, one tells the truth 66 What would be your next deduction in this game of Minesweeper? 49 Is there a proof that a map of the United States requires 4 colors? 32 Twelve balls and a scale 27 Rubik's cube without any algorithms

### Reputation (10,539)

 +10 How do I solve the world's hardest sudoku? +30 Two doors with two guards - one lies, one tells the truth +5 How do I tell the children's ages? +10 Twelve balls and a scale

### Questions (16)

 68 You have one question to tell whether the number I'm thinking of is 1, 2, or 3 32 Why does the 4x4 Rubik's cube have parity cases, while the 3x3 does not? 31 Why is a single-corner twist not a valid position on a Rubik's cube? 21 How do I tell the children's ages? 17 Is there a more efficient way to rotate the centre pieces on the Octo-Star?

### Tags (53)

 246 logical-deduction × 14 79 sudoku × 9 162 rubiks-cube × 22 51 solvability × 4 112 liars × 2 49 topology 106 minesweeper × 7 49 graph-theory 85 strategy × 9 49 geography