127 lines
4.2 KiB
Groff
127 lines
4.2 KiB
Groff
.\" $NetBSD: snake.6,v 1.12 2009/03/11 13:05:59 joerg Exp $
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.\"
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.\" Copyright (c) 1980, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)snake.6 8.1 (Berkeley) 5/31/93
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.\"
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.Dd May 31, 1993
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.Dt SNAKE 6
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.Os
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.Sh NAME
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.Nm snake ,
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.Nm snscore
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.Nd display chase game
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.Sh SYNOPSIS
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.Nm
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.Op Fl w Ar width
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.Op Fl l Ar length
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.Op Fl t
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.Nm snscore
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.Sh DESCRIPTION
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.Nm
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is a display-based game which must be played on a CRT terminal.
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The object of the game is to make as much money as possible without
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getting eaten by the snake.
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The
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.Fl l
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and
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.Fl w
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options allow you to specify the length and width of the field.
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By default the entire screen is used.
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The
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.Fl t
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option makes the game assume you are on a slow terminal.
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.Pp
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You are represented on the screen by an I.
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The snake is 6 squares long and is represented by s's with an S at its head.
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The money is $, and an exit is #.
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Your score is posted in the upper left hand corner.
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.Pp
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You can move around using the same conventions as
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.Xr vi 1 ,
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the
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.Ic h ,
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.Ic j ,
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.Ic k ,
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and
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.Ic l
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keys work, as do the arrow keys.
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Other possibilities include:
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.Bl -tag -width indent
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.It Ic sefc
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These keys are like hjkl but form a directed pad around the d key.
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.It Ic HJKL
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These keys move you all the way in the indicated direction to the
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same row or column as the money.
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This does
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.Em not
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let you jump away from the snake, but rather saves you from having
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to type a key repeatedly.
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The snake still gets all his turns.
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.It Ic SEFC
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Likewise for the upper case versions on the left.
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.It Ic ATPB
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These keys move you to the four edges of the screen.
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Their position on the keyboard is the mnemonic, e.g.
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P is at the far right of the keyboard.
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.It Ic x
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This lets you quit the game at any time.
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.It Ic p
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Points in a direction you might want to go.
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.It Ic w
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Space warp to get out of tight squeezes, at a price.
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.El
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.Pp
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To earn money, move to the same square the money is on.
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A new $ will appear when you earn the current one.
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As you get richer, the snake gets hungrier.
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To leave the game, move to the exit (#).
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.Pp
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A record is kept of the personal best score of each player.
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Scores are only counted if you leave at the exit,
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getting eaten by the snake is worth nothing.
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.Pp
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As in pinball, matching the last digit of your score to the number
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which appears after the game is worth a bonus.
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.Pp
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To see who wastes time playing snake, run
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.Nm snscore .
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.Sh FILES
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.Bl -tag -width /var/games/snakerawscores -compact
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.It Pa /var/games/snakerawscores
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database of personal bests
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.It Pa /var/games/snake.log
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log of games played
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.El
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.Sh BUGS
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When playing on a small screen,
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it's hard to tell when you hit the edge of the screen.
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.Pp
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The scoring function takes into account the size of the screen.
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A perfect function to do this equitably has not been devised.
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