The site has moved to a new server, and there are now some issues to fix. Please report anything needing fixing with a comment to the homepage.

The Chess Variant Pages

Enter Your Reply

The Comment You're Replying To
Greg Strong wrote on 2019-09-08 UTC

Wow, QS explosion is a serious problem.  Now that I have allowed all check evasions in the QSearch, I have my search stack overflowing very quickly in Gross Chess and my stack supports a depth of 128!  After four plies of QS it considers only recaptures and check evasions and I still had over a HUNDRED plies.  I figured something had to be broken with my 3-fold repetition detection, but not so...  In Gross Chess you can literally have over a hundred consecutive moves of nothing by check evasions and recaptures to the last square without triggering repetition.  I would not have thought it possible had I not spent a couple hours manually stepping though about 50 plies until I was convinced it was for real.  (It has a lot to do with the cannons - you can often escape check by moving into the path of your own cannon to become a screen and check the opponent king.)

So I appreciate your previous message or I would probably have been at a loss as to what to do about this.  I've now switched to this:  first four plies of QS are all captures and check evasions; after four plies it switches to only recaptures and check evasions; after eight plies of QS it starts to allow standing pat even when in check (returning the static evaluation rather than -INFINITY.)  This has stopped the search explosion.  I'm now running a 1600 game Capablanca match against FairyMax to ensure this doesn't hurt my search strength too much.  (Seeing as most games don't have the kind of search explosion problems that Gross does but I'd like to keep the search function the same across games if possible.)

Edit Form

Comment on the page Threatened Pawn Chess

Quick Markdown Guide

By default, new comments may be entered as Markdown, simple markup syntax designed to be readable and not look like markup. Comments stored as Markdown will be converted to HTML by Parsedown before displaying them. This follows the Github Flavored Markdown Spec with support for Markdown Extra. For a good overview of Markdown in general, check out the Markdown Guide. Here is a quick comparison of some commonly used Markdown with the rendered result:

Top level header: <H1>

Block quote

Second paragraph in block quote

First Paragraph of response. Italics, bold, and bold italics.

Second Paragraph after blank line. Here is some HTML code mixed in with the Markdown, and here is the same <U>HTML code</U> enclosed by backticks.

Secondary Header: <H2>

  • Unordered list item
  • Second unordered list item
  • New unordered list
    • Nested list item

Third Level header <H3>

  1. An ordered list item.
  2. A second ordered list item with the same number.
  3. A third ordered list item.

Alt text for a graphic image

A definition list
A list of terms, each with one or more definitions following it.
An HTML construct using the tags <DL>, <DT> and <DD>.
A term
Its definition after a colon.
A second definition.
A third definition.
Another term following a blank line
The definition of that term.