BrainKing - 讨论板 (Chess variants (10x8))

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Chess variants (10x8)

Sam has closed his piano and gone to bed ... now we can talk about the real stuff of life ... love, liberty and games such as
Janus, Capablanca Random, Embassy Chess & the odd mention of other 10x8 variants is welcome too

For posting:
- invitations to games (you can also use the New Game menu or for particular games: Janus; Capablanca Random; or Embassy)
- information about upcoming tournaments
- disussion of games (please limit this to completed games or discussion on how a game has arrived at a certain position
... speculation on who has an advantage or the benefits of potential moves is not permitted while that particular game is in progress)
- links to interesting related sites (non-promotional)

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26. 三月 2003, 03:30:30

Grim Reaper

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题目: The database + a contest!!

I can start working on the code for the BN vs K database tonight. It will not be slick, nor fast to execute, but I can get it up and running in no time. I think the longest win is about 38 moves (for one side) so it will need to loop around 75 times (38 times for the winning side, 37 for the losing side) and I am not sure how long each iteration will take to complete.

If I generalize the code to solve any db configuration, I would need to spend at least a week making it very fast.

OK, now for a contest:

Try to set up the most difficult position for a knight and bishop to mate a lone king.

So, tell me the location of:

White King
White Bishop
White Knight
Black King

For the longest white to move and win position you think there is. The winner I will give a free stainless steel Gothic Chess commuter mug, complete with thermal lid.

Post your submissions, one per customer, with the subject heading "B+N vs. K Contest"

OK?

26. 三月 2003, 15:06:46

Felix

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题目: Re: The database + a contest!!

Ed, what an amazing concept! In one move, you have gotten to the crux of this issue, that is: What are the starting positions? I was going to suggest that the 4 pieces be located in the 4 corners of the board, just to make the playing field even, and to get on with the action. But you have one-upped me on that level already! For if we were to play this out, we would have as many as 12 endings: 6 with the defensive king on a light square corner, and 6 on a dark. Some of these 12 games may work out to be insignificantly different. I will have to look at this some more, though, before I submit my contribution for your contest. I will be interested in the results!

Your offer of a thermal mug for the winner makes it all the more appealing, especially with that thermal lid thrown in. I've always wanted a thermal lid!

I would like to know, how can you be sure that a program can find all the best moves for the defensive king? Sometimes a hidden flaw leaves a program "blind" to a line of play. That's why I thought a tournament would put the theory to a practical test. /Fx/

26. 三月 2003, 15:16:45

WhisperzQ

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题目: Re: The database + a contest!!

My quick suggestion is that all the white pieces are in one corner, King right in the corner with the bishop one out or one up (opposite colour to corner), and the black King in the opposite diagonal corner. Before the King can be maniputlated you already have 8 moves for the King, 4 for the knight and possibly 3 for the bishop ... 15 moves before game on! Of course the actual placement of the black King is not so critical so long as he can get to the corner quickly without undue interference. :)