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- From: kleber@husc11.harvard.edu (Gwydden)
- Newsgroups: rec.games.abstract
- Subject: Re: defects in abstract games
- Message-ID: <kleber.725061503@husc.harvard.edu>
- Date: 22 Dec 92 21:58:23 GMT
- Article-I.D.: husc.kleber.725061503
- References: <BzM46D.JH6@dutiws.twi.tudelft.nl> <1992Dec21.190907.26083@ll.mit.edu>
- <BzMrHE.At3@watcgl.uwaterloo.ca> <1992Dec22.143005.11060@ll.mit.edu>
- Lines: 40
- Nntp-Posting-Host: husc11.harvard.edu
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-
- Ed Dengler proposes Hnefatafl (sp?) (that's NEF-tof-ul, sort of) as an
- abstract game with no flaws, and Nate Smith asks for details on what
- it is.
-
- In reverse order: Hnefatafl is a Viking board game; don't remember what
- century, but old. There are two players, one attacking, one "defending",
- or more accurately trying to escape. Players start with lots of
- pieces in a specific arrangement on a large square board-- sizes and
- placement of pieces vary; in the 23x23ish range; with the defending pieces
- mostly towards the center of the board (but a few on the outsides), and
- the attacking pieces genearlly surrounding them.
-
- Players alternate moving a piece; all pieces move like chess rooks.
- Captue is by placing two pieces of yours on either side of a single
- enemy piece, all in one line (XOX captures the O). The one special
- piece is the "defender" king, which starts in the center, and must be
- surrounded on all four sides to capture-- with certain exceptions.
- See below, on why I don't think this is a perfect game.
-
- The goal of the attackers os, of course, to get the king; the goal of the
- defender is to get his king to an edge of the board.
-
- Now, why I don't think this is an unblemished game. First, it has a
- nontrivial starting position, though I can get over that one. Second,
- the rules exceptions I mentioned above: (1) no "attacker" piece can
- ever land *on* the center square where the King starts (I've never
- understood the reason for this rule); (2) as a result, the King could
- stand adjacent to this square and be immune from capture, so if he's
- adjacent to that square, you only need to surround him on three sides;
- (3) similarly, if the king is adjacent to one of his own men, you
- can surround the pair of them (with six guys) and win. This rule
- really needs to be generalized, in something like a go-type way.
-
- Nope, this one has too many impurities for me. I second the nomination
- of Go for the most perfect abstract game, with "mental jujitsu"
- (the perfect-knowledge bidding card game) pretty high up there too.
-
- --Michael Kleber I don't have an overactive imagination...
- kleber@husc.harvard.edu I have an underactive reality... --EG
-