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Game: Stockholm Checkers
 
Created by Mats Winther, 2017-05-13
3 variants

Elimination
2-player

download 49 K
 
Updated 2022-02-26

Added alternative graphics.

 

Stockholm Checkers follows the same rules as International Draughts and Brazilian checkers, except for one important difference: a Man may only capture backwards subsequently, as part of a capture sequence (“deferred backwards capture”). So it cannot capture backwards as immediate move.

A Man steps diagonally forwards. It captures, by the short leap, in all diagonal directions. A King slides and captures in all diagonal directions over any distance. It also jumps to capture, but only one Man at a time. A King may “fly” over empty squares (“long King”).

A Man promotes to King at the last rank. If a Man makes an intermediate landing on a promotion square and can continue capturing, it does not promote. One must continue capturing as long as possible. It is mandatory to select the longest capturing line. Captured pieces are removed only after the move is finished. The goal is to capture all the opponent’s pieces.

A variant features a halt rule is featured: a King must halt behind the last captured piece. This rule also occurs in Argentinian checkers (here). There is also a variant where it is not mandatory to capture the longest line.

The game is played on an 8x8 board with 12 pieces per player. Brazilian checkers (Minor Polish draughts), the forebear of this variant, was known already in the 16th century, and possibly even earlier. It was a popular board game in Holland, especially in Amsterdam.


Discussion

Most Western checkers variants belong to either of two groups, International/Polish or Spanish. In the former, a Man may capture backwards; in the latter only forwards. The problem with backwards capture is that the defence becomes easy. Although a Man advances, it retains control of squares in the rear. The problem with the Spanish group is that it has less combinatorial complexity, due to less capture directions.

Stockholm checkers keeps the advantages of both. Although A Man can also capture backwards, it may only do this later, as part of a series. It means that the defence becomes more difficult. A Man may sneak behind the back of an enemy Man and reach a promotion square. This vouches for a less drawish game. Moreover, the advanced and interesting combinatorial aspects of International/Polish variants are retained. Arguably, the introduction of the deferred backwards capture rule is a significant improvement. Worse endgames will become more difficult to hold. Although this variant is an invention of undersigned, the rule already exists in a traditional Gothic (orthogonal) checkers variant (“Armenian checkers II”), where a Man may not capture southwards as immediate move. However, here the strategical impact of the rule is less pronounced.


See also:

Winther, M. (2015). ‘International/Polish Checkers Variants’. (and here)
------- (2017). ‘Spanish Checkers Variants’. (and here)
------- (2017). ‘Gothic Checkers Variants’. (and here)

 

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(49 K)

Stockholm Checkers

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