0,9

Among all the proof game problems counted in A090051, this is the number of problems where all the surviving pieces are apparently on their start squares.

A. Buchanan, "At Home" proof games

F. Labelle, Statistics on "at home" diagrams

F. Labelle, Mailing list posting about the computation up to ply 14

Cf. A090051.

Sequence in context: A003355 A022278 A006323 this_sequence A061003 A048879 A089211

Adjacent sequences: A102781 A102782 A102783 this_sequence A102785 A102786 A102787

hard,nonn

Francois Labelle (flab(AT)cs.berkeley.edu), Feb 11 2005