Ploesti rules

If the target explodes roll 1d10 for each structure in every adjacent hex. A roll of "1" means that structure explodes as well. There is no roll if the target has a blast wall, or the surrounding structure has a blast wall.

Explosion markers

Turn of explosion - Yellow smoke marker
Turn following explosion - Orange smoke marker
Third turn - Red smoke marker
Fourth turn - Black smoke column.

Structure Explosions - Effect on plane flying through the hex… (Consult table below)

Turn of explosion (Yellow) - Planes in low band roll for damage
Second turn (Orange) - Planes in low and middle band roll for damage
Third turn (Red) - Planes in low level roll for damage
Fourth and subsequent (Black) - Smoke blocks visibility through the hex.

TABLE 15 - Flying through an exploding structure (d10)
------------------ Oil structure -----------------
Roll	Result
1 - 4	No damage
5	Minor damage - roll one critical hit
6	Serious damage - roll two critical hits, plane veers
7	Major damage - roll 3 critical hits, plane veers
8, 9	Plane engulfed in burning oil**
10	Plane destroyed by debris*
----------------- Other structure ------------------
1 - 6	No damage
7	Minor damage - roll one critical hit
8	Serious damage - roll two critical hits, plane veers
9	Major damage - roll 3 critical hits, plane veers
10	Plane destroyed by debris*
* See Critical Hit 6 #B ** See Critical Hit 13