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Эволюция "Киллер-шашек" 
26-е-червень-2017 06:13 pm
Killer draughts: classical 10x10 positions.


Голландский гроссмейстер Вигер Весселинк выбрал 119 классических позиций.
В нормальные шашки 6% позиций выигранные, в "Киллер-шашки" - 48%!

Подробнее о "Киллер-шашках":

"Killer draughts is a slight variation to international draughts that is intended to decrease the drawing rate. But it is difficult to estimate how big the effect will be. So I did an experiment to make things a bit more clear. I have selected 119 classical positions that have occurred in practice. The white position is always the same, while the black position varies slightly. Using a adapted version of the strong draughts program Scan 2.0 made by Fabien Letouzey that can play killer draughts, I analyzed these positions and compared the results. In all cases the principal variation is given, so that they can be compared.

In normal draughts only 6% of these positions end in a win or loss, although in a few cases the draw is very narrow. With the killer rules this percentage increases to 48%. So with the killer rules the number of draws in this game type is still significant. But it is definitely a large improvement. In practice this would mean that the usually very safe classical game type is no longer that safe anymore".


Эволюция "Киллер-шашек".
4-й вариант. Правило работает только если на пути взятия встречается 2 дамки соперника. Таким образом, 3 на 1 - будет выигранный эндшпиль. Но в другой ситуации данное правило не будет влиять на привычный ход партии.

"In International Draughts, three Kings against one King is seldom a win, which tends to make the game drawish in grandmaster practice. Diverse halt rules have been proposed as a remedy.

C. Freeling's killer rule is defined thus: "when a King occurs as final capture, the captor must halt behind the enemy piece". This means that two Kings will win against a lone King. Arguably, it means an overly radical departure from the standard rules. After all, one should be able to play confidently for a draw with one Man less. To fight for a draw belongs to the game. So the ideal is perhaps that three Kings against one King is a win. This is accomplished with the following halt rules.

A.K.W. Damme's sequential halt rule: "at the final capture of a series, the captor must halt behind the enemy piece". It could be argued that this reduces the power of the King too much during the middlegame.

J. Anikejev sequential halt rule ("killer light"): "When a King occurs as the final capture of a series, the captor must halt behind the enemy piece". This works fine. But it is possible to reduce the effects on middlegame King maneuvers even further, with the following proposal.

M. Winther's sequential halt rule: When two Kings occur as the final captures of a series, the captor must halt behind the enemy piece. Also here, three Kings will win against a lone King. To capture two Kings in the last two jumps is a rare occurrence, so the draughts player will hardly experience this King as essentially different than the normal.

I have implemented all these halt rules as variants in my program Draughts with Deferred Backwards Capture.

Mats Winther."
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