What you can bet on
Football first, and more of it than you might expect: the Premier League and every division below it, Scotland, the big European leagues, the cups and the internationals. If your team plays on a Tuesday night in League Two, they are priced.
Racing runs all week: horses through the day, greyhounds into the night, seven days a week.
After that, take your pick: tennis, darts, snooker and table tennis most days of the year, then cricket, rugby, golf, basketball, ice hockey, American football, boxing and MMA, Formula 1 and esports as their seasons come round. If it involves a ball, a cue, a car or a pair of gloves, you can bet on it.
Bet before it starts, or while it runs
Take a price days ahead if you like the look of it, or wait for the team news and take it an hour before kick-off.
Once the whistle goes the live prices move with the game: a goal, a break of serve or a red card redraws them in seconds, and if you blink at the wrong moment the number you wanted has gone.
On football you can build your own bet from one match, the result, a scorer, a card or two, all rolled into a single price.
It is where the tactical geniuses tend to congregate.
Where to start
Register, and the sportsbook opens on today's card. Every offer carries its terms, and the offers change often enough to be worth a look before you bet.
Pick any sport from the sports list for the full picture, and the betting guides take you deeper on the ones worth the time. That is BetDukes: where the fun begins long before the final whistle.