1,290 Stedman Cinques

Robin E H Woolley
31527496E80  7  9 18 19
2146537809E       a
213456                -
1243         s  s  -   
12435687E90       b     |A
2134         s  s  -    |
2134568709E       c
1243         s  s  -   
21345678E90       A
1234567890E       d    
a = 2.s3.6.s8.11.12.13.14.15.21
b = 2.s13.s15
c = 1.s10.12.14.15.16.17.18.19 (20)
d = s7.12.14.15.16.17.18.19 (20)
Start from rounds as the last row of a slow six