Final verdict for the Horse Chestnut

There was no saving the common horse chestnut that split in half two weeks ago. The remaining half was removed, and then it was cut down to the stump. 

Looking on the bright side, the loss of the old tree gives plenty of growing room for another Aesculus growing close by. With the red blooms it's clearly a Red Horse Chestnut, a species that's becoming increasingly popular as a street tree in San Francisco, on Waller, Dolores, and elsewhere.