IDEAS home Printed from https://ideas.repec.org/a/wsi/nmncxx/v04y2008i03ns1793005708001070.html
   My bibliography  Save this article

Enhanced Realization Probability Search

Author

Listed:
  • MARK H. M. WINANDS

    (MICC-IKAT Games and AI Group, Faculty of Humanities and Sciences, Universiteit Maastricht, P.O. Box 616 6200MD Maastricht, The Netherlands)

  • YNGVI BJÖRNSSON

    (School of Computer Science, Reykjavík University, Ofanleiti 2 IS-103 Reykjavík, Iceland)

Abstract

In this paper, we show that Realization Probability Search (RPS) significantly improves the playing strength of a world-class Lines-of-Action (LOA) computer program, even when used in combination with existing state-of-the-artαβsearch enhancements. In a 600-game match, a RPS-based version of the program defeats the original one with a winning score of 62.5%. The main contribution of the paper, however, is the introduction of a much improved variant of RPS, called Enhanced Realization Probability Search (ERPS). The new algorithm addresses two weaknesses of RPS and overcomes them by using a better focussed re-searching scheme, resulting in both more robust tactical play and reduced search overhead. Our experiments in the domain of LOA show that ERPS offers just as a significant improvement over regular RPS, as the latter improves upon regular search. More specifically, the ERPS-based variant scores 62.1% against the RPS variant, and an impressive 72.2% score against the original program. This represents an improvement of over 100 ELO points over the original state-of-the-art player.

Suggested Citation

  • Mark H. M. Winands & Yngvi Björnsson, 2008. "Enhanced Realization Probability Search," New Mathematics and Natural Computation (NMNC), World Scientific Publishing Co. Pte. Ltd., vol. 4(03), pages 329-342.
    • Handle: RePEc:wsi:nmncxx:v:04:y:2008:i:03:n:s1793005708001070
    DOI: 10.1142/S1793005708001070
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S1793005708001070
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S1793005708001070?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Stephanie C. Schleimer & Arthur D. Shulman, 2011. "When Intra-Firm And Inter-Firm Collaborations Co-Occur: Comparing Their Impact Across New Services Versus New Product Innovations," International Journal of Innovation Management (ijim), World Scientific Publishing Co. Pte. Ltd., vol. 15(05), pages 869-898.
    2. Cevahir Uzkurt & Rachna Kumar & Halil Semih Kimzan & Hanife Sert, 2012. "THE IMPACT OF ENVIRONMENTAL UNCERTAINTY DIMENSIONS ON ORGANISATIONAL INNOVATIVENESS: AN EMPIRICAL STUDY ON SMEs," International Journal of Innovation Management (ijim), World Scientific Publishing Co. Pte. Ltd., vol. 16(02), pages 1-23.

    More about this item

    Keywords

    Search; heuristics; games;
    All these keywords.

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:nmncxx:v:04:y:2008:i:03:n:s1793005708001070. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/nmnc/nmnc.shtml .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.