Phil Ivey, a professional poker player who won £7.7m at a Genting Casino in London, is taking his case to the UK Supreme Court after the casino refused to pay out.

Ivey used edge-sorting techniques to win at punto banco, a derivative of baccarat, at Crockford’s Club Mayfair. The technique involves taking advantage of slight design differences or flaws in the face-down cards to determine whether they are of low or high value.

He originally sued for the winnings in 2014, putting forward that edge sorting was no form of cheating. However, a UK Civil Cout ruled against his defence, stating that the strategy had “circumvented the premise of the game and therefore was not liable for the winnings.”