These only tend to work when your opponent has less than 10 seconds
The psycho desperado:
Make a move that checks the opponent's king, even if it's an awful moves that gives away your queen or something. The opponent who will be relying on premove will lose time once they realize their premove doesn't work (since it didn't account for the check) and they'll lose a few seconds responding.
Highway through the dangerzone:
See a square you would love to get one of your pieces to? Only problem is that the only way to get it there is to first move it en prise? Do it anyway. 50% of the time your opponent will assume you know what you're doing and not even realize they can capture it, then it gets to where you want it to go on the next move.
Short-on-time man's bluff:
Sort of a combination of the above two. Make a crazy looking move that involves a threat, even if it hangs a piece. Make it sort of look like a sacrifice even if you don't bother calculating anything. Worst case scenario, your opponent will spend a bit of time figuring out if he can take the piece before taking it. Best case scenario, they won't take it and you'll get to carry out your threat.
The self-playing mate:
In a winning endgame but have no time to actually form a thought before moving? Premove your passed pawns until you have a rook and queen or two queens, then premove the staircase mate pattern - it requires no thinking time whatsoever.
The psycho desperado:
Make a move that checks the opponent's king, even if it's an awful moves that gives away your queen or something. The opponent who will be relying on premove will lose time once they realize their premove doesn't work (since it didn't account for the check) and they'll lose a few seconds responding.
Highway through the dangerzone:
See a square you would love to get one of your pieces to? Only problem is that the only way to get it there is to first move it en prise? Do it anyway. 50% of the time your opponent will assume you know what you're doing and not even realize they can capture it, then it gets to where you want it to go on the next move.
Short-on-time man's bluff:
Sort of a combination of the above two. Make a crazy looking move that involves a threat, even if it hangs a piece. Make it sort of look like a sacrifice even if you don't bother calculating anything. Worst case scenario, your opponent will spend a bit of time figuring out if he can take the piece before taking it. Best case scenario, they won't take it and you'll get to carry out your threat.
The self-playing mate:
In a winning endgame but have no time to actually form a thought before moving? Premove your passed pawns until you have a rook and queen or two queens, then premove the staircase mate pattern - it requires no thinking time whatsoever.