Discussion of chess software programming and technical issues.
Moderators: hgm, Harvey Williamson, bob
Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
-
Evert
- Posts: 2898
- Joined: Fri Jan 21, 2011 11:42 pm
- Location: NL
-
Contact:
Post
by Evert » Fri Jan 20, 2017 1:00 pm
So, I'm trying to improve SjaakII by improving its king safety evaluation in drop-games.
So, I have a specific idea I'd like to try for Shogi and mini-Shogi. Let's give it a go:
Shogi:
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Sjaak II 700M 2168 16 16 1890 65% 2032 0%
2 Sjaak II 700 2032 16 16 1890 35% 2168 0%
Sj Sj
Sjaak II 700M 100
Sjaak II 700 0
Mini-shogi:
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Sjaak II 700 2112 13 13 2800 53% 2088 0%
2 Sjaak II 700M 2088 13 13 2800 47% 2112 0%
Sj Sj
Sjaak II 700 99
Sjaak II 700M 0
Meh. Ok, there seems something to this idea. Let's try some tweaks to it.
Mini-shogi:
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Sjaak II 700M 2154 13 13 2800 62% 2046 0%
2 Sjaak II 700 2046 13 13 2800 38% 2154 0%
Sj Sj
Sjaak II 700M 100
Sjaak II 700 0
Hey, not bad! Shogi:
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Sjaak II 700 2254 19 19 1806 82% 1946 0%
2 Sjaak II 700M 1946 19 19 1806 18% 2254 0%
Sj Sj
Sjaak II 700 100
Sjaak II 700M 0

-
Daniel Anulliero
- Posts: 624
- Joined: Fri Jan 04, 2013 3:55 pm
- Location: Nice
Post
by Daniel Anulliero » Fri Jan 20, 2017 7:15 pm
Hello
Sometimes I hate the hobby too
So , If I look correctly you did two tests with the elo result total inversed?
-
Henk
- Posts: 5101
- Joined: Mon May 27, 2013 8:31 am
Post
by Henk » Fri Jan 20, 2017 9:53 pm
Are there any members who don't hate this hobby ?!
-
Evert
- Posts: 2898
- Joined: Fri Jan 21, 2011 11:42 pm
- Location: NL
-
Contact:
Post
by Evert » Fri Jan 20, 2017 10:09 pm
Daniel Anulliero wrote:Hello
Sometimes I hate the hobby too
So , If I look correctly you did two tests with the elo result total inversed?
Something like that. I can improve play in mini-Shogi, or in regular Shogi, but only at significant cost to the other.
Of course, what this means is that I need to find the correct way to tell these apart and scale the evaluation terms appropriately. Easier said than done, of course.
-
tuxedocat
- Posts: 2
- Joined: Wed Dec 28, 2016 3:29 pm
- Location: Atlanta, GA
-
Contact:
Post
by tuxedocat » Sat Jan 21, 2017 3:42 am
Henk wrote:Are there any members who don't hate this hobby ?!
I'm still naive enough that I don't hate it. In fact, I'm here working on it at 22:30 Friday night.

-
Angrim
- Posts: 61
- Joined: Mon Jun 25, 2012 8:16 pm
- Location: Missoula, MT
Post
by Angrim » Sat Jan 21, 2017 9:24 pm
I just hate that I don't have enough time currently to really take part in this hobby.
-
Evert
- Posts: 2898
- Joined: Fri Jan 21, 2011 11:42 pm
- Location: NL
-
Contact:
Post
by Evert » Sat Jan 21, 2017 10:13 pm
Evert wrote:
Something like that. I can improve play in mini-Shogi, or in regular Shogi, but only at significant cost to the other.
Of course, what this means is that I need to find the correct way to tell these apart and scale the evaluation terms appropriately. Easier said than done, of course.
Ok, I've found something that works: if I scale the king-safety term related to threatened squares around the enemy king by board size, this seems to improve play for both mini-Shogi and regular Shogi, while it's perfectly neutral for Crazyhouse. A test for Tori Shogi is still running.
What makes me uneasy is that I don't see why that type of scaling is reasonable: it gives more weight to having safe squares near the king on a smaller board, which seems more like a general mobility term (controlling squares on the enemy side of the board) than a king-safety term...