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

Yes, it is possible for neither player to be able to make a move without the board being full. The Wikipedia article for Reversi has this example from a competition: There are also simpler examples ...
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19 votes
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How to approach a game of Othello / Reversi?

I am not speaking as a highly expert player, but rather someone who always wins against people with little or no experience, and against overly simplistic computerized versions. So the approaches I've ...
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14 votes
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Is it possible to fill an Othello/Reversi board with one color?

Yes, it is possible. Here is a youtube link showing a game where black fills the entire board: http://www.youtube.com/watch?v=prWG1OFgVqg&t=0m30s (the game starts at 30s)
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11 votes

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 ...
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8 votes
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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 ...
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5 votes

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
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5 votes

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.
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  • 51
5 votes
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How to force the opponent to take the x squares?

It actually can be a bad move to avoid the X squares as long as possible. I've seen games where players so pointedly avoided them that the four corners were taken before the first X space was played. ...
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4 votes

How to force the opponent to take the x squares?

The permutations of the game makes it hard to come up with one specific strategy. Personally I like to "dance around" the X squares, trying to tease my opponent into placing his pieces there. But ...
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4 votes

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 ...
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3 votes

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: ...
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3 votes

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 ...
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3 votes
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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 ...
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3 votes

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

"wipeout" is an example of such an ending, too! It's not something that happens to serious players, but it certainly happens to casual players.
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  • 492
2 votes

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.
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  • 209
2 votes

Othello (Reversi) Online community

You can try Turn The Tides (I'm its developer) which has 24 different boards based on the idea of reversi. You also get to use powers and there are another 24 boards with hexagonal tiles as well. You ...
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2 votes

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 ...
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  • 209
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.
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1 vote
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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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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.
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