I was about to post my runs for the DOS version but see my Windows runs have been moved to the DOS version?
The Windows version can be identified by the fact that it has a regular mouse cursor (rather than the coloured hand), and the game over message comes up in a dialog box rather than as a banner message. Also there's the fact that it's running in a window and has a menu bar. However if those might be cropped out, and if Windows is in a 640x480 mode, they are hidden during gameplay.
I may redo my Windows runs, since I've discovered that playing without sound will speed things up. If I do, I'll probably run them from Windows in 640x480 mode since the capture will look and fit better.
The Windows version seems to be able to run faster overall. It also supports the "Quickplay" mode on the 3D board which has been differentiated from "Full Animation" in the leaderboards, but needn't be for DOS.
So, could my existing runs be moved back to Windows? Then I can submit my DOS runs. Also, the DOS/DOS (Full Animation) categories can be merged.
You use the emulated DOS version with other algorithms. It's not the "real" Windows version released later for Windows 95. This version was made for systems like Windows 3.x. Windows 3.x is a graphical personal computer operating environment developed by Microsoft for the MS-DOS systems. It runs as a graphical, 16-bit multi-tasking shell on top of an existing MS-DOS installation.
This two "Windows" versions have other algorithms for computer players, and I can't make one category for them, but now we have other categories for versions released on Windows (95+), Windows 3.x and MS-DOS, then now you can submit your MS-DOS runs too :).
Okay, so you're not running MPCCHESS.EXE (file size 160,637 bytes, MD-5: 8E334DA64F07A98F8B5BC3C2597C2CC3)?
It would run under both Windows 3.1 and 95.
The algorithms seem the same, since my 2D CPU vs. CPU game is exactly the same as your 3D CPU vs. CPU. If you can't get it to play 4. ... d5 instead of 4. ... e6, there's another reason for that.