Golden State signs and trades Kuminga to Washington, while sending out Moody, and getting back Hauser, who's on a great contract, and three picks. They also might be able to create a trade exception, which can be used in the future.
Washington gambles on Kuminga, but also gets Moody, who's also on a solid contract.
Boston needs a center. Holmes is decent. Losing Hauser stings. But they get a future FRP, and Holmes' expiring contract opens up more cap space next summer, when Tatum is back.