Wheel
Table
Tap a number or an outside bet to place the chip you picked. Pays 35 to 1 on a single number, 2 to 1 on dozens and columns, evens on red, black, odd, even, 1-18 and 19-36. Play money only.
A betting systems simulator answers the question every system seller avoids: what happens over thousands of sessions? Pick a system, set the bankroll and base bet, and the free tool above plays it out spin by spin on roulette. It’s set to Labouchere, and with a £500 bankroll, a £5 base bet and 250 spins on red, about 18% of sessions finish ahead. The average session ends around £160 down.
That’s from our own runs of 2,000 sessions. Yours will differ a little each time, which is the point: you can watch the spread for yourself.
Betting systems simulator: what each system does
- Martingale. Double after every loss. Small wins, rare and brutal losses.
- Labouchere. Write a line (1-2-3-4), bet the first plus the last number. Win and you cross them off, lose and you add the bet to the end. Clear the line and you’re up 10 units.
- Fibonacci. Move one step up the sequence after a loss, two steps back after a win.
- D’Alembert. One unit more after a loss, one less after a win. Slower to blow up, slower to recover.
- Paroli. Double after a win, up to three in a row, then reset. The reverse of Martingale.
- Oscar’s Grind. Aim for one unit of profit per cycle, raising the bet by a unit only after a win.
Results from 2,000 sessions
Same settings for each: £500 bankroll, £5 base bet, 250 spins on red at single-zero roulette.
| System | Sessions that finish ahead | Average result |
|---|---|---|
| Oscar’s Grind | 57% | −£86 |
| Martingale | 41% | −£78 |
| Flat betting | 32% | −£32 |
| Labouchere | 18% | −£160 |
Oscar’s Grind wins more sessions than flat betting and still loses more than twice as much on average. That’s the pattern with every system: it can make winning sessions more common, but the losing ones grow to pay for them. Flat betting loses least because it puts the least money through the wheel. The 2.7% house edge applies to every pound you bet, and no sequence of bet sizes changes it.
Reading the chart
Each run draws the bankroll over the session. Watch for the cliffs: a long, gentle climb followed by a drop to zero is what a progression looks like when it meets a bad run. Try a bigger bankroll and the cliffs come later, not never. The Martingale calculator shows exactly how many losses in a row a bankroll can take, and the roulette simulator lets you play the table by hand.
No betting system beats a house edge. Use the simulator to see that, not to find one that does. BeGambleAware.org is free and confidential if it stops being fun.