The Chess Variant Pages
Custom Search

Enter Your Reply

The Comment You're Replying To
Kevin Pacey wrote on 2019-07-22 UTC

Hi H.G.:

Chess Assistant16 doesn't provide the engine that it used for evaluations, regrettably. However I experimented in another way (though not as you would prefer), using Houdini3 (released 2012) as an engine instead. In the exact position in the line culminating with 9.Qc2-c3 that I gave, after some considerable time to look, Houdini3 evaluates the position as 0.15 (or "+=/="), somewhat better than the 0.04 of CA16's engine (as an aside, a disbelieving master friend dared me to play this line as Black against him in any tournament, back in the 1980s, and gallingly I lost the one time I obliged - in spite of previously winning a number of nice master-level games with it, at least sometimes attacking with queens on the board).

I tried replacing the B on c1 with a White knight (a fairly lousy square for a Kt), and this time Houdini3 gave the position as -0.12 (or "=") after considerable time spent. I then tried looking at the same position but with the White knight on d2 (not a great square completely for a knight, either, but it allows White to develop at least a move faster, probably); in this case Houdini3 rated the position as exactly 0.00 (or "="). Note: replacing the Kt on d2 with a dark-squared White bishop gives a position Houdini3 evaluated as 0.17 (or "+=/="); White can formally develop all his pieces a move faster (probably), but he'll want to eventually improve the lot of that piece (White B) now on d2 - though that seems true if a White Kt were there, too.

It may be worth noting that CA16's engine rates the Nimzo-Indian Defence (position after 3...Bf8-b4) as worth 0.07 (or "+=/=") for White, while Houdini3 gives it as 0.16 (or "+=/=") for White. CA16 considers the Nimzo-Indian complex of defences as numerically Black's best defence to 1.Pd2-d4 (i.e. with 'best' play).

Edit Form

Comment on the page Rules of Chess page

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.