*shrugs*no idea
Deductive Puzzle #44
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We can tell that White has made three captures to Black's two so the missing Bishop must be one of Black's Knights.
We also know that in order for White's queen-side rook to have gotten out both the b3 and e3 captures must have occurred (freeing the Bishop and creating the Rook's escape route) and that in order for Black's missing rook and Bishop to have gotten out the h3 capture must have occurred.
Since only one of black's pieces could have been available for capture (the missing Knight) before the h3 capture it must have been the missing Knight that was captured on b3. This would only have freed the White dark-squared bishop, which was subsequently captured on h3 to loose Black's rook and Bishop for capture on e3 and f3 respectively (freeing the White rook for eventual capture on e6).
Therefor, the Black Knight on c6 must in fact be White's light-squared Bishop.
One of the White Bishops has been transformed into a Knight. No Royalty has moved in this game. With that information, deduce which of the four Knights is in fact White's missing Bishop.