Tree:
BH2 # ???
-WA7
--BF3
---WD1 # setup
---+BF5
---+-WH6
---+--BI5
---+---WB3 
---+---+BI1
---+---+-WE3
---+---+--BE4 # ???
---+---+---WD2
---+---+---+BC6
---+---+---+-WB4
---+---+---+--BD5
---+---+---+---WB5
---+---+---+---+BC5
---+---+---+---+-WE8
---+---+---+---+--BI6
---+---+---+---+---WI8
---+---+---+---+---+BI7 # bad
---+---+---+---+---+-WH5 # gud
---+---+---+---+---+--BB6 # bad
---+---+---+---+---+---WF7 # gud
---+---+---+---+---+-WD6 # ??? (bad?)
---+---+---+---+---+--BC6
---+---+---+---+BD8 # bad
---+---+---+---+-WC5 # gud
---+---+---+---+BI7 # bad
---+---+---+---+-WI6 # gud
---+---+---+---+--BH9
---+---+---+---+-WI8 # bad
---+---+---+---+--BB6 # gud
---+---+---+---WB7 # ???
---+---+---+---+BG1
---+---+---+BF9 # bad
---+---+---+-WC5 # good
---+---+--BE2 # bad
---+---+---WG4 # good
---+---+---+BG3
---+---+---+-WI5
---+---+---+--BF1
---+---+---+---WF2
---+-WE3 # bad
---+--BI3 # good