Four ducks race the length of the lake. Back the one you think gets to the line first. There is one lake for everyone: the same race, at the same moment, on every screen.

• -Bets are open for 15 seconds before each race. The smallest bet is 1.
• -Pick a chip, then tap a duck to put it on that duck. Tap again to add more.
• -You can back as many ducks as you like in one race.
• -Undo takes back your last chip; Clear takes back all of them.
• -Rebet repeats your bets from the last race; 2x doubles what you have down.

Every race has its own prices, from a favourite to a longshot. The number on each duck is what a winning bet returns per chip, your stake included: 100 on a 3.45x duck pays 345.

A lower price means a better chance. Each price is set so that every duck carries the same 5% edge, so no duck is a better bet than another: you are only choosing between winning small more often and winning big now and then.

The winner is drawn at the starting gun, with each duck's chance exactly as priced. What happens on the water is the story of that result.

• -Boosts and waves speed a duck up; splashes and lily pads slow it down.
• -The leader early on is often not the leader at the line.
• -The strip along the bottom of the lake shows the whole course.
• -Winnings are paid as soon as the last duck is home.