Figures and hints updated for mother/2, father/2, and grandparent/2 problems.

2 files changed, 18 insertions, 7 deletions

diff --git a/prolog/problems/family_relations/father_2/common.py b/prolog/problems/family_relations/father_2/common.py
index cbfbcab..1643066 100644
--- a/prolog/problems/family_relations/father_2/common.py
+++ b/prolog/problems/family_relations/father_2/common.py
@@ -21,6 +21,7 @@ father(X, Y) :-
 
 hint_type = {
     'or_instead_of_and': Hint('or_instead_of_and'),
+    'or_instead_of_and_two_rules': Hint('or_instead_of_and_two_rules'),
     'x_must_be_male': Hint('x_must_be_male'),
     'x_must_be_parent': Hint('x_must_be_parent'),
     'y_can_be_of_any_gender': Hint('y_can_be_of_any_gender'),
@@ -80,6 +81,12 @@ def hint(program, solved_problems):
             'findall(_, father(X, Y), L), length(L, 48)'):
             return [{'id': 'or_instead_of_and'}]
 
+        # OR instead of AND written with two rules, namely:
+        #    (r1) father(X, Y):- male(X).  (r2) father(X, Y):- parent(X, Y).
+        if prolog.engine.ask_truth(engine_id,
+            'findall(_, father(X, Y), L), length(L, 48)'):
+            return [{'id': 'or_instead_of_and_two_rules'}]
+
         # X must be male
         if prolog.engine.ask_truth(engine_id, 'female(X), father(X, _)'):
             return [{'id': 'x_must_be_male'}]
diff --git a/prolog/problems/family_relations/father_2/sl.py b/prolog/problems/family_relations/father_2/sl.py
index ee6893b..67bf764 100644
--- a/prolog/problems/family_relations/father_2/sl.py
+++ b/prolog/problems/family_relations/father_2/sl.py
@@ -17,13 +17,12 @@ description = '''\
 
 plan = [
     '''\
-<p><img src="Father-1.png" /></p>
-<p>Loni naj zbriše imena relacij (parent, mother) s te slike!</p>''',
+<p><img src="[%@resource Prolog_father_01.svg%]" alt="Oče ima otroka in je moškega spola." /></p>''',
     '''\
-<p><img src="Father-1.png" /></p>''',
+<p><img src="[%@resource Prolog_father_02.svg%]" alt="Oče X je starš od Y in je moškega spola." /></p>''',
     '''\
-<p>Če je <code>X</code> ženska in je hkrati <code>X</code> starš od <code>Y</code>,
-potem je <code>X</code> mama od <code>Y</code>.</p>'''
+<p>Če je <code>X</code> moški in je hkrati <code>X</code> starš od <code>Y</code>,
+potem je <code>X</code> oče od <code>Y</code>.</p>'''
 ]
 
 hint = {
@@ -31,14 +30,19 @@ hint = {
 <p>Si morda uporabil podpičje (ki pomeni ALI) namesto vejice (ki pomeni IN)?</p>
 ''',
 
+    'or_instead_of_and_two_rules': '''\
+<p>Si morda zapisal dve pravili, eno za spol in eno za "starševstvo"?
+Pozor: velja eno ALI drugo, ne nujno eno IN drugo!</p>
+''',
+
     'x_must_be_male': '''\
 <p>Oče je navadno moškega spola.</p>
-<p><img src="Father-2.png" /></p>
+<p><img src="[%@resource Prolog_father_03.svg%]" /></p>
 ''',
 
     'x_must_be_parent': '''\
 <p>Oče naj bi imel vsaj enega otroka... torej je starš od nekoga.</p>
-<p><img src="Father-3.png" /></p>
+<p><img src="[%@resource Prolog_father_04.svg%]" /></p>
 ''',
 
     'y_can_be_of_any_gender': '''\