The chainsaw was a little blunt and was just burning the wood, even the electric saw with new blade was having a hard time!
I turned to the old hand saw and chisel, which did the job...slowly.
Its Australian Hardwood: "The clue is in the name" as my friend Jesse would say.
It is very hard. It should be called Veryhardwood.
Trivia: Australian carpenters would use green hardwood when making house frames, because once it has seasoned it is near impossible to drive nails into it by hand. The sap makes your hands go black too.
These days though, its all about air-driven nail-guns and pine.