What were whites & blacks last moves??

This was the position after black moves in a certain game.. My question is what were the last 3 half moves??

my chess notation isn't that good but:

... Ba5
b2b4 c4xb3

cute problem: since there's a double check on the king, at least one must have been a revealed check... since neither the rook nor the bishop could have revealed the other's attack, the pawn must have revealed each of their attacks. the only way this could work is by ..cxb3+ en passant. so white must have played b4 directly before this.

Originally posted by blacknight1985
This was the position after black moves in a certain game.. My question is what were the last 3 half moves??

[fen]8/8/k7/b1r5/8/1pK5/8/8[/fen]

Originally posted by SwissGambit
This is the same idea as in R. Smullyan's famous retro:

[fen]8/8/8/1b1r4/k7/8/8/3B4 w - - 0 1[/fen]
Where is the white King?

Originally posted by blacknight1985
wht u mean?? i don get ur question? white king can be almost anywhere no?

Originally posted by SwissGambit
Edit: Oops, diagram error.

Try this one:

[fen]8/8/8/1r1b4/B7/8/8/3k4 w - - 0 1[/fen]
Where is the white King?