A Closer Look at BT2450

In case you'd like to see just what exactly these problems look like, here are some screen shots from ChessGenius. (I used grey for the dark squares simply so that the dark pieces would stand out better.) Each image is a link to the individual PGN file, or you can get the entire file here.

1   White to move 1. Nxg7	2   White to move 1. Bxb6	3   White to move 1. Re6	4   White to move 1. Qf7
5   White to move 1. Ka6	6   Black to move 1. ... e3	7   Black to move 1. ... Rd6	8   White to move 1. Rxg6+
9   Black to move 1. ... g5	10   White to move 1. Rxg7+	11   Black to move 1. ... Qxh2+	12   Black to move 1. ... Qe4
13   White to move 1. Nb4	14   White to move 1. Rxh7	15   White to move 1. Rg6	16   Black to move 1. ... g6
17   White to move 1. Qxf4	18   White to move 1. d6	19   Black to move 1. ... f3	20   White to move 1. Ra2
21   White to move 1. Re6	22   White to move 1. a3	23   White to move 1. Qf6	24   White to move 1. g6
25   Black to move 1. ... Nd3	26   White to move 1. f5	27   White to move 1. e6	28   White to move 1. Ne4
29   White to move 1. Ke1	30   White to move 1. f4