How to play
Diamond Line is a three-reel, single-line slot built around one special symbol. Each reel has 32 stops, and exactly one of them on every reel is a diamond. The diamond is wild: on the payline it stands in for any other symbol, whatever helps you most. Three diamonds in a row is the top prize of the machine.
Choose 1, 2, 5, 10 or 20 credits as your bet and press Spin. The reels come to rest from left to right and the middle row is the only line that pays. All prizes are multiples of your bet, and you can open the pay table on screen for the full list. Your bank starts at 1,000 credits.
Pay table
| Middle row | × bet | Chance per spin |
|---|---|---|
| Three diamonds | 1,000 | 1 in 32,768 |
| Three sevens | 150 | 1 in 1,260 |
| Three triple bars | 50 | 1 in 520 |
| Three double bars | 25 | 1 in 264 |
| Three cherries | 15 | 1 in 331 |
| Three single bars | 12 | 1 in 152 |
| Any three bars, mixed | 5 | 1 in 18 |
| Two cherries from the left | 4 | 1 in 48 |
| One cherry on the left reel | 1 | 1 in 7.9 |
The chances already include diamonds acting as wilds. Only the best combination on the line is paid, and cherries count from the leftmost reel.
How the wild works
The diamond fills a gap in any combination. Seven, diamond, seven is three sevens and pays 150. Diamond, single bar, triple bar is a mixed-bar line worth 5. A diamond on the first reel even counts as a cherry, so it pays at least 1× on its own, and a diamond followed by a real cherry is the two-cherry prize.
The wild doesn’t multiply anything: a seven-line made with a diamond pays the same 150 as three real sevens. Where the diamonds sit matters too. Two diamonds and a seven is three sevens whichever reel the seven is on, and two diamonds and a bar is three of that bar. Two diamonds and a blank depend on the order: on the first two reels they read as two cherries (4×), split across reels one and three only the first counts as a cherry (1×), and blank, diamond, diamond pays nothing, because there’s no blank prize and cherries must start on the left.
Compared with the plain Classic Slots machine, the prizes for ordinary symbols are trimmed a little (sevens 150 instead of 200, triple bars 50 instead of 60, a lone cherry 1 instead of 2) and the strips are slightly different: each reel gives one of its single-bar stops to the diamond, and the first reel carries four cherries rather than five. That budget pays for the 1,000× jackpot and for the wild’s help on every line.
The numbers
The whole machine can be counted exactly: 32 × 32 × 32 = 32,768 equally likely results. Counting them all gives a return of 94.87% and a hit on about one spin in 4.6.
Where that return comes from is telling. Mixed bars supply about 27% of it, more than any other line. Three sevens bring about 12%, and the triple and double bars around 9 to 10% each. The 1,000× jackpot, for all its size, is worth only about 3% of the return, because it lands once in 32,768 spins on average.
One honest note about the single cherry: it pays 1×, which just hands back your bet. It counts as a “win” on screen, but it doesn’t move your balance. Leave those out and a spin that actually adds credits comes about once in 11, not once in 4.6.
Strategy
The only setting you control is the bet, and all five bet sizes share the same 94.87% return, so there’s no “best” one in terms of value. The bet decides how long your credits last and how big a three-diamond hit would be: 1,000 credits at a bet of 1, or 20,000 at a bet of 20.
Since the top prize turns up so rarely, plan as if you won’t see it. The steady wins here are mixed bars and cherries; they slow the drain without reversing it. Every spin is independent, so a machine that’s been quiet isn’t about to pay, and a big hit doesn’t make the next spin worse.
If you want several kinds of seven with their own prizes instead of a wild, look at Sevens Trio.
If you enjoy Diamond Line, try Dice 100 or Dice Baccarat next.
