== combo (cascade multiplier) ==
== single-depth1 ==
RRRGOGOG
GOGOGOGO
OGOGOGOG
GOGOGOGO
OGOGOGOG
GOGOGOGO
OGOGOGOG
GOGOGOGO
round 1: cleared 3 base 30 x1 = 30
flat sum 30
multiplied total 30
== cascade-depth2 ==
OGOGOGOG
GOGOGOGO
RGOGOGOG
BBBOGOGO
RGOGOGOG
ROGOGOGO
OGOGOGOG
GOGOGOGO
round 1: cleared 3 base 30 x1 = 30
round 2: cleared 3 base 30 x2 = 60
flat sum 60
multiplied total 90
== chain-depth3 ==
OGOGOGOG
GOGOGOGO
RGOGOGOG
BBBOGOGO
RGOGOGOG
ROGOGOGO
OGOGOGOG
GOGOGOGO
round 1: cleared 3 base 30 x1 = 30
round 2: cleared 3 base 30 x2 = 60
round 3: cleared 3 base 30 x3 = 90
flat sum 90
multiplied total 180
ok: combo multiplier scales cascade rounds