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24 December 2006

From Chessbase: A christmas tree themed chess puzzle for all your enjoyment

http://www.chessclub.com/mailing/2006/12d/diag3.gif

White to play and mate in two.

This puzzle requires some initial retrograde analysis to get the crucial concept required for mate in two, and a little more intensive retrograde analysis to narrow down the two apparantly possible solutions to the one genuine, unique solution. Created by a truly excellent and prodigious composer, Thomas Rayner Dawson.

22 December 2006

Have (yet again) modified the layout for puzzles, solutions and discussions.

• Relocated all solutions to the Talk page instead of a spoiler in the puzzle page. This reduces the incentive to glance at the solution and also means that I can easily create a group ("test-solvers") that has read access to article pages but no access to Talk pages
• Included on the Talk page a specific section for "Solver discussions". This section contains a table with everybody's feedback on the puzzle so that the designer can refine it if necessary. Things like:
  • Percentage of puzzle completed without guidance
  • A score rating
  • Specific comments on the solver's thought process while solving the puzzle

19 December 2006

SectionProtection tags replaced with Spoiler tags.

• No user lists, no access protection.
• Just a simple javascript toggle to switch between visible / invisible.
• Supports all wiki-text/HTML

SectionProtection script has been updated.

• Newest version supports encryption and prevents the previous workarounds.
• However, doesn't behave well (high server load and session time out) when encrpyting large wiki-text blocks.
• Would strongly suggest that it only be used sparingly, with preference given to Spoiler tags instead.

Example: <spoiler> This is an example </spoiler>