# What's the least amount of pieces on an Othello board where black or white can't make a move?

Say you're following the traditional rules of Othello. What is the least number of pieces possible on the board, producing a result where one of the two players(black or white) can't make a move, thereby passing play to the other player?

What is the least number of possible pieces on the board where both players can't make a move, therefore ending the game before the grid is completely filled?

Bonus question: An othello game can end with the board being entirely filled all one color. Is it possible for all the pieces on an Othello board to be one color, but the board isn't filled entirely? If so, can you give a sequence of moves that would result in that outcome?

• For the first question, does it need to be a situation that can arise in a real game of Othello or we can just lay the pieces however we want to set up that situation?
– Hai
Commented Nov 19, 2017 at 10:03
• It has to arise out in a real game of othello. Same with the second question. Commented Nov 19, 2017 at 16:53
• Otherwise the problem would be ridiculously easy. Commented Nov 19, 2017 at 21:50
• Interesting question! Related: boardgames.stackexchange.com/questions/20539/… Commented Nov 21, 2017 at 21:13
• I think "fewest number" is more appropriate than "least amount." Commented Nov 24, 2017 at 14:27