Modifiers:

S - map size - default is 3: L size
- 1 - Small
- 2 - Medium
- 3 - Large
- 4 - Extra Large
- X - any
U - underground - default is X
- 1 - no under
- 2 - with under
- X - any
D - difficulty - default is 6
- 1 - 80%
- 2 - 100%
- 3 - 130%
- 4 - 160%
- 5 - 200%
- 6 - 130%-160%
- 7 - 160%-200%
- 8 - 130%-200%
- X - any
L - Logictics speciality - default is 1
- 1 - without logistics heroes
- 2 - with logistics
- X - any
C - computers - default is 0
- 0-8 - number of computer players
M - magic spells Dimention Door/Fly/Town Portal - default is 1
- 1 - no DD/Fly
- 2 - with DD/Fly/Town Portal
- 3 - no DD/Fly/Town Portal
- X - any
R - restarts
- 3 - 3 days if there is a) , b) , e) restart condition. See description above
- 7 - 7 days if there is b) restart condition. Other restarts in 3 days. See description above
O - other options (just list them e.g." 0 2,3")
- 1 - no Red Rush (RR)
- 2 - no Hit & Run (HR)
- 3 - no Necropolis as starting town
- 4 - Grail allowed
- 5 - Grail allowed in all towns except Conflux
- 6 - Hillfort allowed
- 7 - Diplo allowed (never seen :-))

If modifier not mentioned - that means player accept default option + standard rules: no diplo, no joiners, no scrolls Level 4 - 5, no Grail, no Carto, no Hillfort, no Cloak of Undead King, no RR, no HR, no necro

Example: SAG map S4D3LXMX means that player wanna play Extra Large, with or without underground, 130% difficulty only, Log speciality is discussible, no computer players, magic spells Dimention Door/Fly/Town Portal are discussible.