0,2

Definition: position = position with castling and en passant information, diagram = position without castling and en passant information.

The positions are taken from the sets that are counted inA083276.

F. Labelle,Statistics on chess positions

P. Österlund,Computation of a(11).

Cf.A083276,A090051.

Sequence in context:A208559A209080A090051*A267718A207402A207751

Adjacent sequences:A089954A089955A089956*A089958A089959A089960

nonn,hard,more,fini

François Labelle,Jan 12 2004

a(9) fromFrançois Labelle,Mar 09 2004

a(10) fromArkadiusz Wesolowski,Jan 04 2012

a(11) from Peter Österlund on Feb 22 2013, verified byFrançois Labelleon Jan 08 2017

approved