as follow:
* Put thin ice at F14 and J14.
* Replace cyan tunnel at F12 with upward tank mover.
* Replace white tunnel at J12 with upward tank mover.
* Replace all blue (#2) and cyan (#3) tunnels with
white (#6) tunnels.
* Score in the hint: Replace 598/297 with 1237/423.
See the attachment. I'm sorry for the trouble.
Have fun.
Bye,
Suyono
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