A102784 In chess, the number of "at home" dual-free proof games in n plies.

1, 0, 0, 0, 0, 0, 0, 0, 10, 41, 116, 335, 1111, 2619, 6067, 12788, 26692

Offset: 0

Author

François Labelle, Feb 11 2005

Keywords

• hard
• nonn
• fini

Comments

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.

Links

• 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

Crossrefs

Cf. A090051.

Extensions

a(15)-a(16) from François Labelle, Apr 01 2015