About this game
Orrery Wheel takes its look from the clockwork models of the solar system built in the 18th century. Beneath the gears it is a standard single-zero wheel, which makes it a good place to study streaks and independence.
💡 Tip: Keep a note of the last 20 results and see for yourself that a “due” number does not arrive any sooner — each spin starts fresh.
How to play
- Set your credits per round — every chip you place costs that amount.
- Tap a number or an outside area (red/black, odd/even, 1–18/19–36, a dozen) to place a chip; you can place several.
- Check the total in play shown under the layout.
- Press SPIN and watch the ball slow down and settle into a pocket.
- Chips on the winning pocket return their multiple; open the paytable any time to compare picks.
The real numbers
37 pockets, one zero; straight number ×36, dozen ×3, even-chance ×2 — margin 2.70%, and no memory between spins.
The chance of red five times in a row is (18/37)⁵ ≈ 2.7%, and ten in a row about 0.074%. Yet after four reds, the next spin is still red with exactly 18/37 ≈ 48.65%. Streaks look meaningful because there are so many places for them to happen, not because the wheel remembers. Every spin returns 97.30% on average, whatever came before.
Rules
Standard single-zero rules apply: place chips, each worth your credits per round, on numbers, red/black, odd/even, 1–18/19–36 or dozens, then press SPIN. Winning chips return ×36, ×3 or ×2, chip included, and 0 clears all outside picks. The result history beside the wheel is for interest only; it has no influence on the next spin, however long a streak it shows.
History
Spinning-wheel games are older than their rules. A popular legend credits the 17th-century French mathematician Blaise Pascal, whose experiments with a perpetual-motion machine supposedly produced the first wheel, but the game itself took shape in 18th-century France, where it got the name roulette, “little wheel”. By the 1790s it was a fixture of Paris gaming rooms, with both a single and a double zero. In 1843 the twin brothers François and Louis Blanc opened a venue in Bad Homburg using only one zero; the smaller margin drew visitors from all over Europe, and François later took the format to Monte Carlo. When the game crossed to North America it kept the double zero, which is why two main layouts still exist today.
Where it is popular today
Number wheels endure because they are easy to read and honest about their maths. One spin, one result, and every possible outcome is printed on the layout in front of you. You can keep things calm with even-chance picks that land almost half the time, or wait patiently for a single number. The wheel also has a strong rhythm — the spin, the slowing ball, the final click — that feels the same in a 19th-century salon or a browser tab.
Beginner’s guide
Start with even-chance picks at a small credits-per-round amount: results land close to half the time, so you learn the layout without big swings. Then try a dozen, and finally a few straight numbers, and notice how the swings grow while the long-run return stays the same. Prefer single-zero wheels if you want a smaller margin. Ignore “hot” and “cold” numbers — every spin is independent. Above all, treat it as a free practice table: virtual credits have no value.
Did you know?
- The numbers 0 to 36 on a single-zero wheel add up to 666.
- Neighbouring pockets alternate red and black, and the numbers are deliberately not in counting order.
- On a 37-pocket wheel a given number is missing for 100 spins in a row about 6.5% of the time.
- The single-zero wheel introduced at Bad Homburg in 1843 roughly halved the margin of the double-zero layout.