%I A089956
%S A089956 0,0,0,12,461,27004,798271,32668081,959129557,35695709940,1078854669486,
%T A089956 39147687661803
%N A089956 Number of chess games that end in check (but not checkmate) after exactly 
               n plies.
%H A089956 F. Labelle, <a href="http://www.cs.berkeley.edu/~flab/chess/statistics-games.html">
               Statistics on chess games</a>
%H A089956 <a href="Sindx_Ch.html#chess">Index entries for sequences related to 
               number of chess games</a>
%Y A089956 Cf. A079485, A048987.
%Y A089956 Sequence in context: A092704 A121348 A112363 this_sequence A003749 A012395 
               A012687
%Y A089956 Adjacent sequences: A089953 A089954 A089955 this_sequence A089957 A089958 
               A089959
%K A089956 nonn,hard
%O A089956 0,4
%A A089956 Francois Labelle (flab(AT)cs.berkeley.edu), Jan 12 2004
%E A089956 a(11) from Francois Labelle (flab(AT)cs.berkeley.edu), Jul 25 2004, who 
               thanks Joost de Heer for providing computer time.