As far as I got it, the only unusual aspects of this variant is the piece confinement and the mandatory capture. So it should not be that difficult. The only special-purpose code that is needed would be for rejecting moves that end on an edge square and do not specify a locust victim (which could be added as the end of the Post-Move sections), and for apparently pseudo-legal moves with non-edge pieces or non-captures with edge pieces, a test whether any of the edge pieces has a capture.
Ok, perhaps I should have said it would be very difficult for me...
I have added full support to ChessV though. This required a couple of special rules, but I added support for basic capture-by-overtake to the internal move generator. My quandry now is what the pieces should be worth... The Rook, Bishop, and Queen are modified in the same way so I assume their relative value should be similar to Chess... The board is enlarged, but use of the outer ring is limited and landing on it hurts your options on the following move significantly, so I think the values should probably not change much from 8x8 values. The Knight is interesting - he has a choice of captures, so maybe his value is augmented. The Pawn, when capturing, moves forward two spaces instead of one, getting it to the other side faster, so maybe it should be worth more as well. But these are just guesses.
EDIT: Upon further consideration ... the Knight has a choice of captures, but no choice where he lands. The Bishop, Rook, and Queen, though, unlike in Chess, can capture and still choose which square to land on (if there is space.) So maybe the Knight is not more powerful.
Ok, perhaps I should have said it would be very difficult for me...
I have added full support to ChessV though. This required a couple of special rules, but I added support for basic capture-by-overtake to the internal move generator. My quandry now is what the pieces should be worth... The Rook, Bishop, and Queen are modified in the same way so I assume their relative value should be similar to Chess... The board is enlarged, but use of the outer ring is limited and landing on it hurts your options on the following move significantly, so I think the values should probably not change much from 8x8 values. The Knight is interesting - he has a choice of captures, so maybe his value is augmented. The Pawn, when capturing, moves forward two spaces instead of one, getting it to the other side faster, so maybe it should be worth more as well. But these are just guesses.
EDIT: Upon further consideration ... the Knight has a choice of captures, but no choice where he lands. The Bishop, Rook, and Queen, though, unlike in Chess, can capture and still choose which square to land on (if there is space.) So maybe the Knight is not more powerful.