CYA
This is a Romanovsky variation. Place 1 unit on 9 consecutive corners (they will be overlapping) in either the 1st and 2nd columns, or the 2nd and 3rd columns. Whichever is the open column, place 5 units on that column bet. The 2 edge corner bets on either end are partial losses. Corner bets on the inside of the edges pay 4 units. If you hit the covered column, it pays 1 unit.
Scouse Variation:
Place 6 units on the column, instead of 5. All full wins are now 3 units instead of 4/1. (I prefer this config)
Progressions:
Standard 2x martingale until recovery.
PREMIUM GUIDE