A swindle in chess is like tricking your friend into giving you their favorite toy even though you don't have one to offer in return. In chess, it's when you're losing really badly, but you make a sneaky move that tricks your opponent into making a mistake and giving you a chance to win the game.
It's like if you were playing a game of chess with your friend and they were winning by a lot. You don't want to lose, so you try to think of a clever way to confuse them and distract them from their plan. You might make a move that seems like it doesn't do much, but it actually sets up a trap for your friend.
For example, you might move your piece to a spot that looks like it's in a bad position, but actually it's part of a clever plan to attack your friend's pieces. Your friend might think you're making a mistake and take the bait, but then you reveal your plan and suddenly you're in a good position to win the game!
So basically, a swindle in chess is when you use your brainpower to turn a losing situation around and win the game by tricking your opponent. It's kind of like being a chess superhero, using your wits to save the day!