[Retros] yet still more 8th rank mates again

[andrew buchanan]

(can this ever end? yes: there are just 16 more cases to handle:
N	axb
N	cxb
N	dxc
N	exd
N	dxe
N	fxe
N	exf
N	fxg
B	b
B	c
B	f
B	axb
B	exd
B	dxe
B	fxe
B	hxg)

In the mean time, the following new cases have been handled:

bxaB
rnb1kbnr/Pp1ppppp/2p5/1q6/8/2KP4/2PBPPPP/bN1Q1BNR
PG in 8.0

dxcB
1nb1kbnr/rp1ppppp/2Q5/p4q2/P2P4/2P1K3/RP2PPPP/2b2BNR
PG in 9.0

fxgB
rn2kbnr/p1pp1p1p/4pq2/8/8/3PKbP1/PPPQP2P/RNB3b1
PG in 9.0

cxbB
rn2k1nr/p1ppNp1p/6p1/4p3/7q/3KP3/P2PQPPP/bbB2BNR
PG in 10.0
No extraneous promoted pieces: double phoenix!

Cheers,
Andrew.