The winning Delaware Play 4 numbers for September 13, 1988 were: night 8-1-5-1.
Sum is the digits added together (5+5+0 = 10). Root sum keeps adding until one digit is left (10 → 1+0 = 1) — many regular players track it in their notebooks. Odd/Even marks each digit O or E (5-5-0 = OOE). High/Low marks 0–4 as L and 5–9 as H (5-5-0 = HHL).
| Date | Draw | Numbers | Sum | Root |
|---|---|---|---|---|
| Sep 13, 1988 | Night | 8-1-5-1 | 15 | 6 |
| Sep 12, 1988 | Night | 4-0-2-1 | 7 | 7 |
| Sep 10, 1988 | Night | 9-1-1-5 | 16 | 7 |
| Sep 9, 1988 | Night | 1-8-5-9 | 23 | 5 |
| Sep 8, 1988 | Night | 2-8-3-2 | 15 | 6 |
| Sep 7, 1988 | Night | 3-5-4-7 | 19 | 1 |