Butterfly+Heuristic

toc =Thought Experiment= The Butterfly Heuristic was proposed by Dap Hartmann in conjunction with so called Butterfly Boards as a pure thought experiment :
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 * [[image:Xvxi1.jpg link="https://en.wikipedia.org/wiki/File:Xvxi1.jpg"]] ||~  || The **Butterfly Heuristic** is a dynamic move ordering method based on the number of trials of a given move inside the search, irrespectively from the position in which the move has been made, and in opposition to the History Heuristic, irrespectively whether a move fails high or not. ||
 * Butterfly and Chinese [|wisteriaflowers] ||~  ||^   ||

=Persistence= Another utilization of Butterfly Boards, as proposed by Hartmann, was to make them persistent, initialized by moves from many Grandmaster and/or Correspondent chess games. Mark Winands at al. assimilated both, Schaeffer's History Heuristic combined with Hartmann's Butterfly Heuristic, and introduced the Relative History Heuristic

=See also=
 * Butterfly Boards
 * Countermove Heuristic
 * History Heuristic
 * Late Move Reductions
 * Relative History Heuristic

=Publications=
 * Jonathan Schaeffer (**1983**). //The History Heuristic//. ICCA Journal, Vol. 6, No. 3
 * Dap Hartmann (**1987**). //How to Extract Relevant Knowledge from Grandmaster Games. Part 1: Grandmasters have Insights - the Problem is what to Incorporate into Practical Problems.// ICCA Journal, Vol. 10, No. 1
 * Dap Hartmann (**1987**). //How to Extract Relevant Knowledge from Grandmaster Games. Part 2: the Notion of Mobility, and the Work of De Groot and Slater//. ICCA Journal, Vol. 10, No. 2
 * Dap Hartmann (**1988**). //Butterfly Boards//. ICCA Journal, Vol. 11, Nos. 2/3
 * Dap Hartmann, Peter Kouwenhoven (**1991**). //Sundry Computer Chess Topics//. Advances in Computer Chess 6
 * Jos Uiterwijk (**1992**). //The Countermove Heuristic//. ICCA Journal, Vol. 15, No. 1
 * Mark Winands, Erik van der Werf, Jaap van den Herik, Jos Uiterwijk (**2006**). //The Relative History Heuristic//. CG 2006, [|pdf]

=External Links= > Joe Henderson, George Duke, [|David Amaro], [|Ernie Hood], Stanley Clarke, Airto Moreira > media type="youtube" key="0zsb5rMncYU" width="560"
 * [|Butterfly from Wikipedia]
 * [|Heuristic from Wikipedia]
 * Flora Purim - [|Butterfly Dreams] (1973), [|YouTube] Video

=References= =What links here?= include page="Butterfly Heuristic" component="backlinks" limit="30"
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