quick question,
finalled DTD last nite 103 players. 824000 chips in play, blinds at 3k-6k/600. i have 92k roughly... (so pretty much a crapshoot-by next level there was 100BB in play 8 handed)
passes to button who shoves 23k i have

. BB has 29k. so i want him out to take this HU (right?) so i announce all in.
BB tanks and asks me if i had A9, good read i guess but played 15 mins of whole tourney with him, ends up taking a 3-4 mins making a decision b4 finally shipping the rest in

.
maybe im thinking about this the wrong way but is his call in a 3-way all in pot with K5 correct coz of the maths or is this just dumb?
BTW- button has

, board comes

.
could chompy please post his expert views thanks!!!