Trickery - Revision history

Ardub23: /* Consequences */ Removed redundant 'of trickery' from header, and clarified distinction between trickery and dying

2024-04-07T00:29:51Z

‎Consequences: Removed redundant 'of trickery' from header, and clarified distinction between trickery and dying

Umbire the Phantom at 10:10, 13 April 2022

2022-04-13T10:10:59Z

Aximili: move SLEX info to its own section

2022-03-30T05:28:32Z

move SLEX info to its own section

ChasonBot at 23:41, 21 December 2015

2015-12-21T23:41:48Z

Bluescreenofdeath at 07:24, 7 March 2014

2014-03-07T07:24:31Z

Bluescreenofdeath: added variant info

2014-03-07T07:20:13Z

added variant info

Graham87: /* References */ copyedit

2011-10-29T14:11:30Z

‎References: copyedit

Tjr: Text replace - "==Source code references==" to "==References=="

2011-01-05T09:30:23Z

Text replace - "==Source code references==" to "==References=="

Ray Chason: Some operating systems can't detect some trickeries

2007-04-21T17:11:42Z

Some operating systems can't detect some trickeries

Ray Chason: Wikified, expanded, copyedited

2007-04-21T17:01:35Z

Wikified, expanded, copyedited

@@ Line 17: / Line 17: @@
 Not all possible cheating with level or bones files is detected as trickery.  A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game.  [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.
-==Consequences of trickery==
+==Consequences==
-If the game is in [[wizard mode]], the message "You are a very tricky wizard, it seems." is printed, and the game continues (except for deleted level files).  Otherwise, the game immediately ends.  An [[amulet of life saving]] will not continue the game.
+If the game is in [[wizard mode]], the message "You are a very tricky wizard, it seems." is printed, and the game continues (except for deleted level files).  Otherwise, the game immediately ends.
-A game that ends due to trickery is not eligible to leave [[bones]].
+Trickery is distinct from [[dying]]. An [[amulet of life saving]] will not continue the game, and the game will not generate [[bones]].
 ==References==

@@ Line 21: / Line 21: @@
 If the game is in [[wizard mode]], the message "You are a very tricky wizard, it seems." is printed, and the game continues (except for deleted level files).  Otherwise, the game immediately ends.  An [[amulet of life saving]] will not continue the game.
-A game that ends in trickery is not eligible to leave [[bones]].
+A game that ends due to trickery is not eligible to leave [[bones]].
 ==References==

@@ Line 16: / Line 16: @@
 Not all possible cheating with level or bones files is detected as trickery.  A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game.  [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.
 ==Consequences of trickery==
@@ Line 24: / Line 22: @@
 A game that ends in trickery is not eligible to leave [[bones]].
 ==References==

← Older revision		Revision as of 23:41, 21 December 2015
Line 37:		Line 37:

	[[Category:Cheating]]		[[Category:Cheating]]
		+	{{nethack-343}}

@@ Line 17: / Line 17: @@
 Not all possible cheating with level or bones files is detected as trickery.  A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game.  [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.
-In Slash'EM Extended, due to the possibility of the game falsely declaring a trickery even if the player didn't do anything wrong, the trickery mechanism has been removed and in most cases the player can salvage the game.
+In Slash'EM Extended, due to the possibility of the game falsely declaring a trickery even if the player didn't do anything wrong (which can happen in vanilla and other variants too, if the player is unlucky), the trickery mechanism has been removed and in most cases the player can salvage the game. The message will read "Normally this would have been a trickery, but I'm not that cruel. --Amy" and the game will probably panic, leaving files that might need to be treated with the [[recover]] utility.
 ==Consequences of trickery==

← Older revision		Revision as of 07:20, 7 March 2014
Line 16:		Line 16:

	Not all possible cheating with level or bones files is detected as trickery. A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game. [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.		Not all possible cheating with level or bones files is detected as trickery. A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game. [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.
		+
		+	In Slash'EM Extended, due to the possibility of the game falsely declaring a trickery even if the player didn't do anything wrong, the trickery mechanism has been removed and in most cases the player can salvage the game.

	==Consequences of trickery==		==Consequences of trickery==

@@ Line 26: / Line 26: @@
 [[bones.c#line409|bones.c line 409]] -- detects renaming of bones files, which if undetected would use the bones on a different level from where they were generated.
-[[do.c#line1102|do.c line 1102]] -- opens a level file for an already-generated level, in order to enter the level; declares a trickery if the file can't be opened.
+[[do.c#line1102|do.c line 1102]] -- opens a level file for an already-generated level, to enter the level; declares a trickery if the file can't be opened.
 [[restore.c#line722|restore.c line 722]] -- detects renaming of level files to appear on a different level (dlvl != lev) and copying of level files from another game or a different session of the same game (pid != hpid).
-[[save.c#line245|save.c line 245]] -- opens a level file in order to copy its contents to the save file; declares a trickery if the file can't be opened.
+[[save.c#line245|save.c line 245]] -- opens a level file to copy its contents to the save file; declares a trickery if the file can't be opened.
-[[save.c#line351|save.c line 351]] -- opens the "level 0 file", which is not a true level file but contains the state of the game at the last level change; declares a trickery if it can't be opened or if the file belongs to a different game or session than this one.
+[[save.c#line351|save.c line 351]] -- opens the "level 0 file", which is not a true level file but contains the state of the game at the last level change; declares a trickery if it can't be opened or if the file belongs to a different game or session from this one.
 [[Category:Cheating]]

@@ Line 1: / Line 1: @@
 The game declares a '''trickery''' when it detects manipulation of a [[level]] file or [[bones]] file.  Such an occurrence is taken as evidence of [[cheating]] and the game is declared forfeit.
 Events that end the game in trickery are:
@@ Line 11: / Line 13: @@
 * Copying a level file out of the playground, [[save|saving]], restoring, and then copying the level file back in (even if the level hasn't changed; it's the process ID that is checked).
-A trickery that occurs in the absence of cheating is a [[bug]].
+Some operating systems do not support process IDs; on these, the game cannot detect cross-game or cross-session copying of level files, and will not declare a trickery.
 Not all possible cheating with level or bones files is detected as trickery.  A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game.  [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.

← Older revision		Revision as of 17:01, 21 April 2007
Line 1:		Line 1:
−	~~See Cheating~~	+	The game declares a '''trickery''' when it detects manipulation of a [[level]] file or [[bones]] file. Such an occurrence is taken as evidence of [[cheating]] and the game is declared forfeit.

−	~~Trickery~~ is ~~where~~ a ~~player attempts~~ to ~~cheat via moving~~ files in a ~~manner~~ that ~~prevents them~~ from ~~getting deleted so that~~ they can be ~~used again,~~ and ~~gets~~ a ~~mesage about~~ "~~trickery~~", ~~and then dies~~.	+	Events that end the game in trickery are:
		+
		+	* Removing a [[level]] file from a game in progress, possibly an attempt to cause the level to be generated anew.
		+
		+	* Renaming a [[bones]] file in an attempt to load it on a different level from where it was generated. This only happens if the bones file is actually loaded.
		+
		+	* Copying a level file from a different game.
		+
		+	* Copying a level file out of the playground, [[save\|saving]], restoring, and then copying the level file back in (even if the level hasn't changed; it's the process ID that is checked).
		+
		+	A trickery that occurs in the absence of cheating is a [[bug]].
		+
		+	Not all possible cheating with level or bones files is detected as trickery. A level file could be copied out of the [[playground]] and then copied back in, restoring the level to its previous state; or a bones file, once used, could be copied back into the playground for a future game. [[Scumming]] with level files ''will'' be detected as trickery if the user [[save]]s and restores in the meantime, because that would be a different session of the game.
		+
		+	==Consequences of trickery==
		+
		+	If the game is in [[wizard mode]], the message "You are a very tricky wizard, it seems." is printed, and the game continues (except for deleted level files). Otherwise, the game immediately ends. An [[amulet of life saving]] will not continue the game.
		+
		+	A game that ends in trickery is not eligible to leave [[bones]].
		+
		+	==Source code references==
		+	[[bones.c#line409\|bones.c line 409]] -- detects renaming of bones files, which if undetected would use the bones on a different level from where they were generated.
		+
		+	[[do.c#line1102\|do.c line 1102]] -- opens a level file for an already-generated level, in order to enter the level; declares a trickery if the file can't be opened.
		+
		+	[[restore.c#line722\|restore.c line 722]] -- detects renaming of level files to appear on a different level (dlvl != lev) and copying of level files from another game or a different session of the same game (pid != hpid).
		+
		+	[[save.c#line245\|save.c line 245]] -- opens a level file in order to copy its contents to the save file; declares a trickery if the file can't be opened.
		+
		+	[[save.c#line351\|save.c line 351]] -- opens the "level 0 file", which is not a true level file but contains the state of the game at the last level change; declares a trickery if it can't be opened or if the file belongs to a different game or session than this one.
		+
		+	[[Category:Cheating]]