Qc8 guards c6, and guards e6 when reborn on g4. Gc8 guards e6, and guards e4 when reborn on g4,…
Paul's version can be tested with Popeye using "option threat 2". On my PC it takes less than 3 minutes.…
The phantom rule doesn't apply to kings unless RexInclusive is specified.
The problem is sound without bRd3. Also, the only function of bBh3 is to stop 1.h1=Q exd8=S 2.Qh7 Sf7#. In fact,…
Breton-specific mates, with 3.Kxa6[-c6]?? being self-check from wRg6, and 3.Kxb8[-c7]?? being self-check from wBf4. In order for this to work a…
Correction: In (b), 2.Rd6 is not a self-block, which is another slight difference.
The B1 moves prevent capture of the mating piece, although a slight difference is that 1.Bc4 prevents capture by the pawn…
Initially, 1...Qxd2?? is illegal because of check from bPg2 (via g7). The plan is to promote bPg2 to R and then…
Whenever I write to Chris Feather, I tell him about problems of his that have recently been published.
Chris Feather uses snail mail to correspond with editors and chess friends.