The Enigma of the Old Manor House — 7 of 28

Part Lighting

Definition: a thing is inaccessible rather than accessible if it is nowhere or it is enclosed by a closed container.

A thing can be lightbound, darkbound, or unbound. A thing is usually unbound.

To decide whether there should be light:

if the breaker panel is switched on, yes;

if the location of the lantern is the location and the lantern is switched on and the lantern is accessible, yes; [Using this instead of scope because scope is only recalculated at specific times]

no.

To decide whether there should not be light:

if there should be light, no;

yes.

To decide whether there should be darkness:

if there should be light, no;

yes.

To rearrange the set:

if there should be light:

now all lightbound things are scopable;

now all lightbound things are not undescribed;

now all darkbound things are unscopable;

now all darkbound things are undescribed;

otherwise:

now all darkbound things are scopable;

now all darkbound things are not undescribed;

now all lightbound things are unscopable;

now all lightbound things are undescribed.

Before doing anything with an unscopable thing:

now the latest parser error is the can't see any such thing error;

carry out the printing a parser error activity;

stop the action.

Rule for printing a parser error when the latest parser error is the can't see any such thing error and there should be darkness: say "You feel around, but can't find any such thing in the dark."

Every turn: rearrange the set.

After going: rearrange the set; continue the action.

Before looking: rearrange the set.

When play begins: rearrange the set.

[The moon is a darkbound thing in Alpha.

The sun is a lightbound thing in Alpha.]

[The first-door is jammed.]