# Tag Info

### How to approach a game of Othello / Reversi?

Cluster-borders (or border-lines) is a core concept to win, in my humble opinion, being a decent player: 1. Counter-intuitively, in the beginning of the game, one of the tactics is to take as few ...
Accepted

### In reversi, can you overwrite two chips in one move?

No. From the Rules of Play: Each piece played must be laid adjacent to an opponent's piece so that the opponent's piece or a row of opponent's pieces is flanked by the new piece and another ...

### Is it possible for an Othello / Reversi game to end without the board being filled?

This is very simple. If one corner is empty, but black has both edges and the diagonal, then black can't go in the corner, and neither can white.
• 51

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

For the bonus, the shortest possible game that results in all pieces the same colour (9 moves) is here: https://www.youtube.com/watch?v=6ehiWOSp_wk

### Othello - Most number of legal moves in a given turn

It is very hard to say it without browsing all possible combinations. Another question is are you asking about moves in game that make sense or any random game. I was playing this game many years and ...
• 229

### How to approach a game of Othello / Reversi?

If you want all the strategy to be simplified into a single sentence, it would be: Maximize mobility, aim for stable disks. Disks are considered stable when they cannot be flipped again. For ...

### Othello Vs Checkers -- are there any complexity and skill comparisons?

From AI point of view, or at least from a Search-intensive approach, Othello is harder. Checkers has been weakly solved at 2007. Othello has not been solved yet. From the paper Checkers Is Solved: ...
• 4,348
Accepted

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

D3C5D6E3B4C3D2C4F4 which is the same sequence Julia gave, not only answers the bonus question, but actually all questions. The least number for both players to not have an option is the 9 move wipe ...

### Is it possible for an Othello / Reversi game to end without the board being filled?

Othello‘s rule book states in the final sentence “it is possible for a game to end before all 64 squares are fillled”. We just encountered such an edge case. White had the final move, and could not ...

### Othello (Reversi) Online community

Server where many good players play is Kurnik. If you're asking about communities this is a website of federation that organise international tournaments.
• 229
Accepted

### Is it legal to use opponent's stones in reversi or othello?

I looked at a few sources for Othello rules, and they either didn't have any rules that cover this edge case or like Ultra Board Games state that you should take discs from your opponent if you run ...
• 20.1k
1 vote

### Othello/Reversi: Given the board state of an ongoing game, is it possible to programatically determine the moves the players have made?

The less stones that are on the board, the higher is your chance that you can determinate the exact sequence of played stones. But it is easy to prove that there are more ways to reach the same ...
• 1,759
1 vote

### Is it possible for an Othello / Reversi game to end without the board being filled?

This game ends with a draw, neither player able to play.
1 vote

### Othello (Reversi) Online community

The international version of "Kurnik" is playok.com. Othello quest is the app where most good players play. On android or iphone.
1 vote
Accepted

### Othello on a non-square board?

There is a fairly famous othello variation called octagon othello. it's basically played on a 10x10 board with the corner regions cut out. .... ...... ........ .......... ....ox.... ....xo.... ....

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