home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.math:17060 rec.games.abstract:636
- Newsgroups: sci.math,rec.games.abstract
- Path: sparky!uunet!spool.mu.edu!caen!saimiri.primate.wisc.edu!usenet.coe.montana.edu!news.u.washington.edu!uw-beaver!micro-heart-of-gold.mit.edu!xn.ll.mit.edu!ll.mit.edu!nates
- From: nates@ll.mit.edu ( Nate Smith)
- Subject: Re: Game of pentominos
- Message-ID: <1992Dec16.215437.8916@ll.mit.edu>
- Sender: news@ll.mit.edu
- Organization: MIT Lincoln Laboratory
- References: <martel.724342292@marvin> <1992Dec15.154734.23894@odin.diku.dk> <1992Dec16.182611.10896@progress.com>
- Date: Wed, 16 Dec 92 21:54:37 GMT
- Lines: 42
-
- In article <1992Dec16.182611.10896@progress.com> neil@progress.COM (Neil Galarneau) writes:
- >>martel@marvin.mr.sintef.no (Paulo Martel) writes:
- >>>After several tries I gave up a combinatorial analysis of the game of
- >>>pentominos. Would someone point me to a reference, or briefly explain
- >>>how one could compute the total number of solutions for a grid of a
- >>>given size (6x10, 5x12, 4x15, 3x20).
- >
- >Ah... Good old pentominoes.
- >Several years ago, motivated by a passage in one of Clarke's novels, several
- >of us programmed pentominoes.
- >It is not very hard to solve it, it is a lot harder to solve it efficiently.
- >The programming was a lot of fun.
- >There are about 2100 solutions to the 6x10 case.
- >
- >Neil
- >neil@progress.com
-
- this has about as much to do with the game of pentominoes as the
- elaborate solitaire games for the PC has to do with MahJongg....
-
- the game of pentominoes, as described by martin gardner, consists
- of the 12 pieces and an 8x8 board. each of the 2 players takes one
- of the unplayed pieces and positions it over 5 unoccupied squares.
- the last player to move wins. martin was impressed with its
- complexity.
-
- a LONG time ago, i was given a game called "Pan-Kai". this is a
- variant of the above played with 2 sets of pentominoes in 2
- colors on a 10x10 board. the objective was still the same - make
- the last move. the difference was that now you could make a "box"
- in the shape of a piece you still had but your opponent didnt. this
- would give you an extra move at the end. i played that game quite
- a bit as a kid and found it quite intriguing. i never got to play
- the 8x8 version because by the time i found out about it, nobody
- wanted to have anything to do with me & my pentominoes. :-) :-(
-
- oh well....later i invented my best game, QuintHex, using ideas
- from Pan-Kai...there are exactly 12 quintastix, for example.
-
- the sequence 1,1,2,5,12,35,108,.... is still unsolved, i bet.
-
- - nate
-