Killer draughts

[Wieger Wesselink]

On http://10x10.org I have added an article about 119 practical classical 10x10 positions. With the normal rules only 6% of them end in a decision. With killer draughts this becomes 48%. For all positions I added the main variant for both normal and for killer draughts, so they can be compared. Perhaps this will help a little to form an objective opinion about killer draughts.

[MLWi]

I have updated my Killer draughts and Modern draughts ("Killer light") Zillions programs on below links. The code is now somewhat more effective.
Killer draughts
Modern draughts

It would be worthwhile to investigate Wieger's positions for Modern draughts, where the killer rule only takes effect at multiple captures.

Mats

[MLWi]

Of course, I made a hideous programming error in Modern Draughts. Fixed now:
Modern Draughts--improved International Draughts!

You should really consider Juri Anikejev's suggestion. The King must land immediately behind the last captured piece, provided (1) that it is a King and (2) it's a multiple capture sequence. This means that three Kings will win against a lone King. Note that, unlike in Killer Draughts, the halt rule is not valid at single piece capture.

Mats Winther

[Fabien Letouzey]

You should really consider Juri Anikejev's suggestion. The King must land immediately behind the last captured piece, provided (1) that it is a King and (2) it's a multiple capture sequence. This means that three Kings will win against a lone King. Note that, unlike in Killer Draughts, the halt rule is not valid at single piece capture.

Hi Mats,

You seem to assume that the source of the draw problem is that three kings cannot win in general against one. Unfortunately, this doesn't seem to be the case. I made a quick change in Scan's move generator and it appears that, at least at that level, the draw rate in Killer-light is still extremely large.

I will try your proposal for backward captures. There is also the possibility that I made a mistake; I will keep you posted.

Fabien.

[Juri]

On http://10x10.org I have added an article about 119 practical classical 10x10 positions. With the normal rules only 6% of them end in a decision. With killer draughts this becomes 48%. For all positions I added the main variant for both normal and for killer draughts, so they can be compared. Perhaps this will help a little to form an objective opinion about killer draughts.

I think, it is a time to organise the first tournament in Killer-draughts.
To see what is it in practice.