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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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2 votes
1 answer
130 views

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: ...
altair's user avatar
  • 21
0 votes
2 answers
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 ...
geneo's user avatar
  • 11
-5 votes
1 answer
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 (...
marius's user avatar
  • 99
4 votes
1 answer
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 ...
Jonah's user avatar
  • 41
2 votes
1 answer
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 ...
Rafael's user avatar
  • 123
5 votes
2 answers
3k views

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 ...
Sriv's user avatar
  • 159
5 votes
1 answer
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 ...
Wasabi's user avatar
  • 51
0 votes
1 answer
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 ...
Xetrov's user avatar
  • 1,564
1 vote
1 answer
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?
anonymous's user avatar
  • 111
3 votes
2 answers
45k views

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 ...
OmniAmori's user avatar
2 votes
2 answers
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 ...
John Robertson's user avatar
15 votes
1 answer
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 ...
Dan Rust's user avatar
  • 259
19 votes
1 answer
18k views

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? ...
Joachim Breitner's user avatar
13 votes
3 answers
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.
alan2here's user avatar
  • 133
37 votes
1 answer
8k views

What is the optimal strategy in Quantum Tic Tac Toe?

Quantum Tic Tac Toe is a variant of Tic-Tac-Toe with "entangled" states (there are even iPhone and Android apps). In essence, a classic naught or cross isn't placed until the 'quantum state' of the ...
ripper234's user avatar
  • 473