Find Position Page

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You can now search board positions on SL's pages.

The current functionality is limited. Please read about requirements and limitations below and report errors to BugReport or to the forum of this page.


Start searching full board positions


Table of contents

Requirements

The search interface needs Javascript and your browser needs to be DOM level 2 compliant (IE5+, NS6+, Mozilla, Opera 6+, Konqueror, Safari.)

If you don't see a board on the search page, or if it does not behave like expected than either you don't have Javascript enabled, or your browser is too old.

Short help

  • Board
    • Clicking on an empty board position: set stone with color "Next" (top right).
    • Clicking on a stone: remove the stone from the board.
    • Clear board: removes all stones from the board
  • Mode:
    • 'alternate': switch color after adding a stone to the board
    • 'black/white only': add only stones of this color
  • Next: shows the color of the next stone that is added to the board. You can change the color by clicking on the image.
  • Sente: search only for positions whose next move is black or white. If empty, all colors are allowed.

Limitations

  • Currently, only full board positions on 19x19 boards can be searched. Full board is defined as having four borders, i.e. a borderless 19x19 diagram is not indexed.
  • The index is updated once a day, so if an edit removes a diagram, the search result may be inaccurate
  • The search automatically tries all 16 variants of the position (rotation, mirror, color exchange.) There is no option for searching specific variations.
  • The search does not take into account irregular or unusual gobans (i.e. it assumes that all internal points have 4 liberties, all border points have 3 liberties, and all corner points have 2 liberties)

Next steps

The infrastructure is in place now, so the following should be rather easy to implement:

  • full board on arbitrary sized gobans (up to a max. board size)
  • corner search

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This is a copy of the living page "Find Position Page" at Sensei's Library.
(OC) 2008 the Authors, published under the OpenContent License V1.0.
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