But 13 per cent of dads refuse to let kids win because they can't stand losing themselves.
Over 70 per cent of parents let their children win when playing board games, says LEGO.
A survey of 2,000 parents commissioned by the construction toy giant found that mums happily allow kids to win 'if it makes life easier'.
52 per cent of parents said that they regularly play board games with their children, compared to 39 per cent of parents who preferred video and computer games.
Dads are real sticklers for the rules, with 13 per cent refusing to let their kids win because they can't bare losing themselves.
A quarter of British parents said they even feel guilty if they don't let their children win, and one in five said it's more important their child has fun and wins every time, than learn you can't come top in everything.
Additionally, 30 per cent of parents have confessed to rowing with their other half because of their refusal to let their kids get the better of them.
Jo Merton, spokesperson for LEGO Games, said: "Parents can be accused of mollycoddling their kids when it comes to playing games. With younger children especially it's understandable that you don't want to hinder their confidence but instead encourage them to take part in family games.
"To add to the pressure, sometimes losing can lead to tearful tantrums – which many parents would rather avoid at all costs.
"The great thing about LEGO Games is that there are different modes of play offered and children and parents actually work together to build the game.
"For instance, with a game like Creationary, you can choose to play individually or in teams - it's great fun, competitive and keeps tantrums to a minimum."
Over 40 per cent of board game sales happen in December.
