This site is supported by donations to The OEIS Foundation.



Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A007545 Number of chess games with n plies (another version).
(Formerly M5100)

%I M5100

%S 1,20,400,8902,197742,4897256,120921506,3284294545,88867026005

%N Number of chess games with n plies (another version).

%C Up to a(6) this is the number of chess games with all legality constraints removed, even allowing the king to be captured. (This differs from the number of positions in suicide chess, as suicide chess contains compulsory captures.) - Richard Bean (rwb(AT)eskimo.com), Jun 18 2003

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Chess.html">Chess</a>

%H <a href="/index/Ch#chess">Index entries for sequences related to number of chess games</a>

%Y Cf. A048987.

%K fini,nonn,hard

%O 0,2

%A Ken Thompson (ken(AT)google.com)

%E I am not sure of the precise rules that were used to compute these numbers. A006494 and A048987 are the preferred versions of this sequence. - _N. J. A. Sloane_.

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 25 18:43 EST 2015. Contains 264418 sequences.