Asian handicaps level a mismatch by adding virtual goals to one team before kick-off. Backing the favourite at −1.5 means they must win by two clear goals; backing the underdog at +1.5 wins if they avoid losing by two or more. Whole-number handicaps (−1.0) can push: if the favourite wins by exactly one, stakes are refunded.
Quarter lines (−0.75, +1.25) split your stake across the two adjacent lines — half on −0.5 and half on −1.0, for instance — so results can be half-wins and half-losses. Because the draw is engineered out, Asian handicap markets have only two outcomes, typically carry lower margins than 1X2, and are where much of the sharpest football money trades.
£20 on the favourite at −0.75 (odds 1.95): a one-goal win pays the −0.5 half in full and refunds the −1.0 half — total return £29.75, a 'half-win'. A two-goal win pays both halves: £39.