Raphexon wrote: ↑Mon Sep 14, 2020 2:23 pm
The start position of Capablanca is relatively garbage.
Testing it with Fairy-Stockfish gave me a fairly hefty opening advantage at 60+0.6.
White vs Black: +952 -438 =610 [0.628] 2000
There are also unprotected pawns in the beginning.
I've also tested Gothic Chess. (Capablanca but different start position)
Which was a lot more balanced: White vs black = +360 -291 =338 [0.529]
More balanced than standard chess too.
What openings did you use?
From start with 4 threads...
So there might be artifacts... But atleast SMP prevents it from being totally deterministic. It does have a bias towards certain opening moves but games did quickly diverge from having eyeballed it.
When I'm home I can share PGNs.
Since there's no real opening theory for it I'd have to create an opening book myself.
Which would still add artifacts because I'd be using SF MultiPV to pick viable moves.
Raphexon wrote: ↑Mon Sep 14, 2020 2:23 pm
The start position of Capablanca is relatively garbage.
Testing it with Fairy-Stockfish gave me a fairly hefty opening advantage at 60+0.6.
White vs Black: +952 -438 =610 [0.628] 2000
There are also unprotected pawns in the beginning.
I've also tested Gothic Chess. (Capablanca but different start position)
Which was a lot more balanced: White vs black = +360 -291 =338 [0.529]
More balanced than standard chess too.
What openings did you use?
From start with 4 threads...
So there might be artifacts... But atleast SMP prevents it from being totally deterministic. It does have a bias towards certain opening moves but games did quickly diverge from having eyeballed it.
When I'm home I can share PGNs.
Since there's no real opening theory for it I'd have to create an opening book myself.
Which would still add artifacts because I'd be using SF MultiPV to pick viable moves.
Have 4 - 8 reasonable 2ply openings, that will improve the variability of the openings and decrease the artifacts by an order of magnitude. Then play with 2 or 4 threads.
Raphexon wrote: ↑Mon Sep 14, 2020 2:23 pm
The start position of Capablanca is relatively garbage.
Testing it with Fairy-Stockfish gave me a fairly hefty opening advantage at 60+0.6.
White vs Black: +952 -438 =610 [0.628] 2000
There are also unprotected pawns in the beginning.
I've also tested Gothic Chess. (Capablanca but different start position)
Which was a lot more balanced: White vs black = +360 -291 =338 [0.529]
More balanced than standard chess too.
What openings did you use?
From start with 4 threads...
So there might be artifacts... But atleast SMP prevents it from being totally deterministic. It does have a bias towards certain opening moves but games did quickly diverge from having eyeballed it.
When I'm home I can share PGNs.
Since there's no real opening theory for it I'd have to create an opening book myself.
Which would still add artifacts because I'd be using SF MultiPV to pick viable moves.
Have 4 - 8 reasonable 2ply openings, that will improve the variability of the openings and decrease the artifacts by an order of magnitude. Then play with 2 or 4 threads.
I'm going to follow your advice and create a small opening book.
There are 28 opening moves for Capablanca with plenty of viable ones:
Going to run till depth 25, select a few and run those until depth 25 too.
Think I'm going to pick all moves within 50cp from best.
Raphexon wrote: ↑Mon Sep 14, 2020 2:23 pm
The start position of Capablanca is relatively garbage.
Testing it with Fairy-Stockfish gave me a fairly hefty opening advantage at 60+0.6.
White vs Black: +952 -438 =610 [0.628] 2000
There are also unprotected pawns in the beginning.
I've also tested Gothic Chess. (Capablanca but different start position)
Which was a lot more balanced: White vs black = +360 -291 =338 [0.529]
More balanced than standard chess too.
Do you know the opening advantage for Shogi, Xiangqi, checkers, backgammon, etc. (in terms of win percentage of each side)?
Raphexon wrote: ↑Mon Sep 14, 2020 2:23 pm
The start position of Capablanca is relatively garbage.
Testing it with Fairy-Stockfish gave me a fairly hefty opening advantage at 60+0.6.
White vs Black: +952 -438 =610 [0.628] 2000
There are also unprotected pawns in the beginning.
I've also tested Gothic Chess. (Capablanca but different start position)
Which was a lot more balanced: White vs black = +360 -291 =338 [0.529]
More balanced than standard chess too.
Do you know the opening advantage for Shogi, Xiangqi, checkers, backgammon, etc. (in terms of win percentage of each side)?
Shogi's opening advantage is minimal.
The Japanese Shogi federation even had a year where second player (white) won more than the first player.
A nice variant is kq-chess: swap the white king and queen positions (king on d1, queen on e1); white short castle goes to the queenside (king on b1, rook on c1), white long castle to the kingside (king f1, rook e1).
A lot of opposite castling should lead to more attacking games and fewer draws. Totally new openings, but still the chess that we all know and love. And its not just one of the 960 positions!
I played this variant a lot with friends, we enjoy it.
Should be easy to implement and test for the expert programmers.
jp wrote: ↑Tue Sep 15, 2020 3:56 am
Do you know the opening advantage for Shogi, Xiangqi, checkers, backgammon, etc. (in terms of win percentage of each side)?
Shogi's opening advantage is minimal.
The Japanese Shogi federation even had a year where second player (white) won more than the first player.
jp wrote: ↑Tue Sep 15, 2020 3:56 am
Do you know the opening advantage for Shogi, Xiangqi, checkers, backgammon, etc. (in terms of win percentage of each side)?
Shogi's opening advantage is minimal.
The Japanese Shogi federation even had a year where second player (white) won more than the first player.
