Test Zebra3

Jan Burse, created Jun 30. 2019
/**
* CLP(FD) code for the Zebra riddle.
*
* First published as "Who owns the Zebra?" in the Life International
* magazine on December 17, 1962 with solution given in the March 25,
* 1963 issue. The riddle given here is not a verbatim copy.
*
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
*
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
*
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
*
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
*
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*/
:- current_prolog_flag(dialect, jekejeke) -> true
; use_module(library(clpfd)).
:- current_prolog_flag(dialect, jekejeke)
-> use_module(library(finite/clpfd)); true.
% zebra3(-List)
zebra3(Variables) :-
Nationality = [Brit,Swede,Dane,Norwegian,German],
Pet = [Dog,Bird,Cat,Horse,_],
Cigarette = [Pallmall,Dunhill,Rothmans,Marlboro,Winfield],
Drink = [Tea,Coffee,Milk,Beer,Water],
Color = [Red,White,Green,Yellow,Blue],
term_variables([Nationality,Pet,Cigarette,Drink,Color], Variables),
Variables ins 1..5,
all_different(Nationality),
all_different(Cigarette),
Norwegian #= 1,
Milk #= 3,
Brit #= Red,
Swede #= Dog,
Dane #= Tea,
Green+1 #= White,
Coffee #= Green,
Bird #= Pallmall,
Dunhill #= Yellow,
Dunhill-Horse+1 #= Dist1,
Marlboro-Cat+1 #= Dist2,
Marlboro-Water+1 #= Dist3,
Winfield #= Beer,
German #= Rothmans,
Norwegian-Blue+1 #= Dist4,
[Dist1,Dist2,Dist3,Dist4] ins 0\/2,
label(Variables).

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