Hi Lorenzo,
Thank you for your response. Just two additional questions
1. The movement backward is different of behind another, isn't it?
L- Yes they are different.
In this case moving A backward would suppose a 20 mm move and moving it behod B would suppose 20 mm backward first and then 30 mm leftwards. So A and B would become a group
Right? If I understand you correctly, the second move cannot be chosen as it is not the minimum.
L- In your drawing the right slide seems the shortest one. BTW assuming the 20mm back move is the shortest one, if it creates the required space, there is no need to go left. The goal is let contacting element have the room to execute a legal contact.
2. According to p.33, elements within an enemy TZ MAY line up if they wish, so this situation will be more common than you foresee.
L- Look at page 32 in the Threat zone paragraph, line 4. It says "Any move ............. must either:" ......... "line up as soon as possible the opposite TZ........" or "Move straight forward either ...... c) moving directly towards the enemy exerting the TZ"
This means there is not so much freedom of actions, and your opponent in his bound can try to position himself to avoid dangers.
Only elements contacting an enemy front must line up. I can imagine some tricky combos using Psiloi pinner elements just to be moved away by Kn or other QK'ing elements in order to avoid enemy shooting.
L- This is the reason for I warned PB, suggesting to count as moved the friendly element pushed out of the way. Anyway I see this issue as a minor one, imho.