Examples

Examples

Postby Vetinari (engine) » Sun Oct 19, 2014 10:23 pm

Since some of the positions on the example page are easy to solve with an engine I had the idea that users may suggest positions for that page. E.g. I had a Q endgame (10 men) in which the engine showed a constant eval which usually means that there is now win. But finalgen could prove that there was a win in ~60. Unfortunately I already deleted the files, but would you be interested in future solutions of complicated endgames?
Vetinari (engine)
 
Posts: 18
Joined: Thu Jul 31, 2014 12:23 pm

Re: Examples

Postby pPerez » Tue Oct 21, 2014 1:38 pm

For instance, here you have two examples of fortresses.
Both of them are draw

The first one is not obvious for a human or an engine, but it can be solved very fast in Draw detection mode:
8/8/2n2p2/5B2/3k2P1/2p5/2K5/8 w - - 0 1

The second one is very intuitive to play for a human, but it is a nightmare for engines:
You can put the white king in any legal square. The result will be a draw.
k7/1p6/p1r5/P7/1K1Q4/8/8/8 b - - 0 1
pPerez
Site Admin
 
Posts: 60
Joined: Sat Sep 08, 2012 3:37 pm

Re: Examples

Postby duncan » Tue Oct 21, 2014 11:10 pm

Vetinari (engine) wrote:Since some of the positions on the example page are easy to solve with an engine I had the idea that users may suggest positions for that page. E.g. I had a Q endgame (10 men) in which the engine showed a constant eval which usually means that there is now win. But finalgen could prove that there was a win in ~60. Unfortunately I already deleted the files, but would you be interested in future solutions of complicated endgames?


I would be interested where ever it would be posted.
duncan
 
Posts: 10
Joined: Mon May 26, 2014 5:41 pm

Re: Examples

Postby Vetinari (engine) » Mon Oct 27, 2014 12:42 pm

If I remember correctly this was the position:
7k/p5p1/7p/2PQp3/8/3K3P/5q2/8 w - - 0 1
White wins in 50-60 moves or so.
Because of the high depth it's impossible to prove a win with an engine here. After 10 seconds Stockfish showed something like +2.5. After a few hours it showed something like +2.6. A bit later there were even positions where Stockfish didn't find the quickest win which could end in not finding the win at all.

P.S. Used Space: ~10 TB (compressed ~3 TB)
Used Time: ~ 1 month (about 10 computer crashs :oops: )
Vetinari (engine)
 
Posts: 18
Joined: Thu Jul 31, 2014 12:23 pm

Re: Examples

Postby 1legendaryclerk » Tue Oct 28, 2014 2:19 am

Hi Vetinari(Engine), can you please help me with something?

For 4Q3/6pk/7p/8/1P6/5qPP/7K/8 w - - 0 1 I need 1TB, 13GB. (According to FinalGen, I am assuming this means 1TB + 13GB?) After compression, I will need over 300GB (30%). I only have 120GB. My maximum is 232GB. I have run this for 21 hours and 15% completed and it is still running. The current file size 71.2 GB (compressed, if uncompressed the size would be 239GB. So clearly I won't have the hard disk space. I estimate that I can only run up to 1/3 of it. So since you have the disk space (you can even do a 3TB compressed!), can you please do it for me and post the results here?

On a separate note, 7zip ultra mode can compress much better. So assuming I reach my limit. Then can I use 7zip ultra mode to compress it and then replace the 7zip compress contents with the original in the original folder, then continue the process with FinalGen?
1legendaryclerk
 
Posts: 3
Joined: Tue Oct 28, 2014 2:06 am

Re: Examples

Postby Vetinari (engine) » Tue Oct 28, 2014 1:37 pm

Hi 1legendaryclerk,
sorry I need my space and especially the time for my own endgames. I guess you are White in a CC game, right?
You could run it in draw mode. It should take less than 100 GB (uncompressed). If result is Draw for every move you should just play the engine move. If there is only one move "Draw or White wins" you can play that move. Finally if there are more than one "Draw or White wins" you can look at each of them with an engine.
BTW I don't think white has that many choices because if the threatened perpetual so maybe the engine suggestion is enough (e.g. if many moves are 0.00 and only one or two are not (which maybe could transpose into eachother)).
Vetinari (engine)
 
Posts: 18
Joined: Thu Jul 31, 2014 12:23 pm

Re: Examples

Postby 1legendaryclerk » Tue Oct 28, 2014 4:47 pm

No it is not a CC game. It is because I think I know how to win this type of end game and I want to use it to check if my answer is correct a not.
1legendaryclerk
 
Posts: 3
Joined: Tue Oct 28, 2014 2:06 am

Re: Examples

Postby duncan » Sun Nov 02, 2014 12:45 pm

Vetinari (engine) wrote:If I remember correctly this was the position:
7k/p5p1/7p/2PQp3/8/3K3P/5q2/8 w - - 0 1
White wins in 50-60 moves or so.
Because of the high depth it's impossible to prove a win with an engine here. After 10 seconds Stockfish showed something like +2.5. After a few hours it showed something like +2.6. A bit later there were even positions where Stockfish didn't find the quickest win which could end in not finding the win at all.

P.S. Used Space: ~10 TB (compressed ~3 TB)
Used Time: ~ 1 month (about 10 computer crashs :oops: )


10 tb in a month seems fast to me . do you have a powerful computer ? what is the set up
duncan
 
Posts: 10
Joined: Mon May 26, 2014 5:41 pm

Re: Examples

Postby Vetinari (engine) » Sun Nov 02, 2014 7:08 pm

My processor is an Intel i7-4930K. But since finalgen uses only one core...
Plus my new hard disk that is relatively fast. I think without crashes I could have done it in 3 weeks or so.
Vetinari (engine)
 
Posts: 18
Joined: Thu Jul 31, 2014 12:23 pm

Re: Examples

Postby duncan » Fri Nov 07, 2014 10:42 am

is there anything to learn from your crashes. if you did it again would you be able to avoid the crashes.? also what hard disk do you have ?
duncan
 
Posts: 10
Joined: Mon May 26, 2014 5:41 pm

Next

Return to FinalGen EndGame Generator Forum

Who is online

Users browsing this forum: No registered users and 1 guest

cron