The tendency
Gemini players have a sly and subtle style, taking advantage of an opponent without the opponent noticing. Constant chatter and distracting conversation throw you off your own game, which makes their moves easier to miss. They are avid students of chess and can play any piece with ease.
The weakness is the middle game, the phase where strategy matters most. Their moves can look scattered, but they rarely give up on a game.
The Gemini chess life
Geminis usually start young and continue well into their middle years, averaging about one game a week, often with family members who play too.
Pieces Gemini favors and fears
At the start they favor queens and bishops, then shift toward knights. They fear losing the queen even when they do not use her often, and will promote a pawn to a queen given the chance.
How to play against a Gemini
Force them to slow down. It frustrates them and throws off the game. They play an offensive game waiting for you to err, so give them nothing to capitalize on. They can also be led astray by false compliments and their own overconfidence. Some spread pieces across the whole board, which may come from a dislike of small spaces.