Your pattern
Tap a number to add a 1-unit straight bet, or use the buttons. For splits, streets and corners, type the numbers in a row, e.g. 17,20.
Every spin
Test it
How the sessions ended
A roulette system tester lets you try that system you’ve been thinking about without risking a penny. It starts with the James Bond: 14 units on 19 to 36, 5 on the 13 to 18 six-line, 1 on zero. That covers 25 of 37 numbers and wins on 67.6% of spins. Then the free tester runs 5,000 sessions of 100 spins with a £200 bankroll at £1 a unit. About a third finished ahead. The average session lost £49, close to the £54 that a 2.7% edge on £20 a spin predicts over 100 spins. It’s a bit less only because some sessions ran out of money early.
Building a pattern in the roulette system tester
- Tap numbers on the layout to add straight-up bets, one unit per tap.
- Use the buttons for red, black, odd, even, the dozens and the columns.
- For splits, streets, corners and six-lines, add a bet and type the numbers: 17,20 is a split, 25,26,28,29 a corner, 13-18 a six-line.
- Or start from a pattern: James Bond, Voisins du zéro, Tiers du cylindre, Orphelins or Jeu zéro, the French announced bets, each with the right chips.
The top panel shows exactly what one spin does: how many numbers are covered, how often you profit, every possible result, and the house edge on the whole pattern.
What the tests show
Every pattern of standard bets has the same edge on a single-zero wheel: 2.70%. Covering more numbers raises how often you win and lowers how much you win when you do. It never changes the average. You can see it for yourself. Load Tiers, then Voisins, then your own mix: the edge line doesn’t move.
Staking systems change the shape, not the maths. Add Martingale to the James Bond and most sessions win small, but a run of losing spins wipes out the bankroll. Paroli does the opposite: lots of small losses and the odd big win. Fibonacci and D’Alembert sit in between.
That’s the honest value of a system tester. It shows you what kind of ride you’re signing up for. For single even-money bets, the betting systems simulator is simpler, and the French roulette calculator covers La Partage.
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