# Questions tagged [tic-tac-toe]

For questions about the pencil and paper game played on a 3x3 grid. Also known as Noughts and Crosses.

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### Optimal strategy for 4-in-a-row on 5-by-5 board with random setup and a transfer

Is the optimal strategy known for the following variant of 4-in-a-row where the first 2 moves are random and the 2nd player can once move a mark to any location. Win condition: 4-in-a-row. Board: ...
• 21
153 views

### 70's tic-tac-toe 'like' game with a pendulum

I remember receiving a game in the early 70's for Christmas that came in a pretty big box (about 18"-24" square). There was a pole that had a tether-ball with about a foot of cord and a ball ...
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199 views

### What constitutes the end of a Tic Tac Toe game? [closed]

Tic Tac Toe is famously a futile game, because when both sides play optimally, it always ends in a draw. Curiously now, a friend of mine (let's call her Alice) played Tic Tac Toe with another friend (...
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2k views

### Strategy for Movable Tic Tac Toe

Movable Tic Tac Toe is similar to the classic game as it uses 3 x 3 matrix and has the same goal of winning, which is to align 3 X's or O's marks horizontally, vertically or diagonally. The ...
• 41
406 views

### in Tic-tac-toe on an NxN board, what is the minimum goal (number in a row) that guarantees a tie?

I've been working on a Tic-Tac-Toe AI (Minimax with AB pruning). As far as I can tell, for an NxN board, player 1 can always win if the goal is to get less than N-1 in a row (for N > 4). Is there a ...
• 123
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### Winning strategy for NxN Tic-Tac-Toe

In a standard 3x3 Tic-Tac-Toe board, there is a strategy to win if the opponent makes a mistake. As far as I know, the strategy goes like: Capture the centers Capture the edges Capture a square which ...
• 159
469 views

### Identify 3D Tic Tac Toe type of game

Looking for the name and rules of the game. Four identical pieces. Each a clear plastic double cube with a red round bead in the center of one cube (half of the piece) and a green round bead in the ...
• 51
945 views

### How do I play 4D Tic-Tac-Toe? [closed]

Quite simple, how do I play 4D TicTacToe? Anybody can imagine a dot. Anybody can imagine a line. Anybody can imagine a plane. Most people can imagine a solid. What about a four dimensional object? No ...
• 1,564
1 vote
719 views

### Tic-Tac-Toe card games? [closed]

My family is developing a game based off of Tic-Tac-Toe. Only the objective is the same though. Are there any other games out there with similar goals and objectives based off of Tic-Tac-Toe?
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### What's the best strategy to win a tic-tac-toe variant on a 5x5-board?

First: We assume that every player is playing at its best Rules 5x5 board Player 1 begins and puts every turn one cross “X”. Player 2 puts every turn two circles “O”. They don’t have to be next to ...
53k views

### Is there a good tic tac toe strategy for the second player?

The assumptions here are that your opponent will block whenever you could win on the next move, and also that given the opportunity to force a win (by creating two different directions with two in a ...
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3k views

### Name of this interesting variant of Tic-tac-toe?

A group of grad students and I regularly meet up at conferences. Often, we spend our coffee breaks between talks playing various suggested generalisations of common pen-and-paper games to see if we ...
• 259
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### Is Ultimate Tic Tac Toe solved?

Ultimate Tic Tac Toe is an interesting variant of Tic Tac Toe where in each of the 9 fields, a “regular” game of Tic Tac Toe is played; see the link for details. Has this game been solved already? ...
3k views

### First modern Naughts and Crosses/Tic Tac Toe?

When was Naughts and Crosses first released in its current form? I see there were Egyptian and the Roman versions, but these are very different games.
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