%------------------------------------------------------------------------------
% File     : PUZ034+2 : TPTP v8.2.0. Bugfixed v4.1.0.
% Domain   : Puzzles
% Problem  : N queens problem
% Version  : Especial.
% English  : The problem is to show that the N-queens problem has the variable
%            variable symmetry property.

% Refs     : [Bau08] Baumgartner (2008), Email to G. Sutcliffe
%          : [BS09]  Baumgartner & Slaney (2009), Constraint Modelling: A C
% Source   : [Bau08]
% Names    :

% Status   : Theorem
% Rating   : 0.70 v4.0.1, 0.74 v4.0.0
% Syntax   : Number of formulae    :   10 (   3 unit)
%            Number of atoms       :   35 (  13 equality)
%            Maximal formula depth :   10 (   5 average)
%            Number of connectives :   31 (   6 ~  ;   0  |;  15  &)
%                                         (   3 <=>;   7 =>;   0 <=)
%                                         (   0 <~>;   0 ~|;   0 ~&)
%            Number of predicates  :    4 (   2 propositional; 0-2 arity)
%            Number of functors    :    8 (   2 constant; 0-2 arity)
%            Number of variables   :   21 (   0 singleton;  21 !;   0 ?)
%            Maximal term depth    :    3 (   2 average)

% Comments :
% Bugfixes : v4.1.0 - Renamed to PUZ133+1
%------------------------------------------------------------------------------