update zHash depending on who is up to move
use correct current location hash key for newUctTree
use correct key in lookup in rootNodeVisits
allow access to TreeLoc contructor, hold on to rootLoc in runUCT
remove spurious $
call nextMoveColor inside of nextMovesWithHash
addendum newUctTree fix
add another lookup error message
fix error
derive Show
add trace and a warning if selectLeafPath is []
add lookup error
add lookup error