This is a collection of videos of interesting games modes featuring AI vs AI gameplay.
They are also available in a YouTube playlist.
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Tough to win outright. The challenges tends to be to not be the one losing player.
First to two lines on a 3x4 grid. Not much better than Classic Tic-tac-toe once you see the AI player.
Also shows two of the Gemini star sign icons.
Drop four (with three-in-a-row) with free turns and on a vertical cylinder.
Drop four has the unique feature that horizontal and vertical wrapping obviously play differently. Sadly, this is an example of a really unfair game in which the first player has to do something really silly to lose. In this case, the AI does just that.
Drop four (with three-in-a-row) with free turns and on a Möbius strip.
Classic Tic-tac-toe. Most of the showcases have used the “normal” difficulty AI. Normal or higher results in nearly identical games, so to make it more interesting, the “easy” AI is used.
I previously wrote about how the easy AI is different.
A reasonably fair four player game.
Probably the simplest misère variant that is competitive.
The same rules as the classic board game.
Combining “free turn” with “overlines disallowed” produces odd results. You will often find yourself forced to make overlines, having your score reduced, and then being forced to make more overlines. Repeatedly.