Igor and Ivan the terrible - The same program?

Celadus · Post by **Celadus** » Mon Jun 11, 2018 5:44 pm

Both have identical user manuals. The opening books seem the same.

Do they both have the same programs?

Tibono2 · Post by **Tibono2** » Mon Jun 11, 2018 7:35 pm

Hi Celadus,

maybe you would like to read this post from Ron Nelson.

Hardware characteristics slightly differ between Ivan & Igor.
Unfortunately Ron's comment most probably relates to the microcontroller (MCU) itself (according to Hitachi hardware manual, check preface p.7)

Thus Ivan's program may or may not make use of additional ROM & RAM provided by its H8/3216. But as tuning hardware for lowest production price was part of the job, my guess is there are some differences within the codes.

Schachcomputer's Wiki-Elo-Liste lists Igor & Grandmaster at same rank - 1840 for Aktiv schach; while a very close 1845 is reported for Ivan.

So very same class program, anyway.
Regards
Tibono

Celadus · Post by **Celadus** » Mon Jun 11, 2018 11:48 pm

Tibono2 wrote:Hi Celadus,

maybe you would like to read this post from Ron Nelson.

Hardware characteristics slightly differ between Ivan & Igor.
Unfortunately Ron's comment most probably relates to the microcontroller (MCU) itself (according to Hitachi hardware manual, check preface p.7)

Thus Ivan's program may or may not make use of additional ROM & RAM provided by its H8/3216. But as tuning hardware for lowest production price was part of the job, my guess is there are some differences within the codes.

Schachcomputer's Wiki-Elo-Liste lists Igor & Grandmaster at same rank - 1840 for Aktiv schach; while a very close 1845 is reported for Ivan.

So very same class program, anyway.
Regards
Tibono

Thank You Tibono. A very interesting and helpful post.

paulwise3 · Post by **paulwise3** » Tue Jun 12, 2018 8:39 pm

Thanx indeed Tibono!
When I find the time I will try a comparison between the Ivan and the Grandmaster.
The Grandmaster should also have the same program.
Maybe Nick (Spacious Mind) already did that some years ago...

Bryan Whitby · Post by **Bryan Whitby** » Wed Jun 13, 2018 7:29 am

Here is Nick's complete list.
The Excalibur Igor is on the list at 190 and the Grandmaster at 199.

http://www.hiarcs.net/forums/viewtopic. ... &start=195

paulwise3 · Post by **paulwise3** » Wed Jun 13, 2018 7:37 pm

Chessmaster Ireland wrote:Here is Nick's complete list.
The Excalibur Igor is on the list at 190 and the Grandmaster at 199.

http://www.hiarcs.net/forums/viewtopic. ... &start=195

Thanx very much!
I lost track on all Nick's testing posts...

Not seeing the forest through all the trees regards,
Paul