Figures and hints updated for mother/2 problem.

9 files changed, 1383 insertions, 5 deletions

diff --git a/prolog/problems/family_relations/mother_2/Mother-1.png b/prolog/problems/family_relations/mother_2/Mother-1.png
deleted file mode 100644
index 239b54f..0000000
--- a/prolog/problems/family_relations/mother_2/Mother-1.png
+++ /dev/null
diff --git a/prolog/problems/family_relations/mother_2/Mother-2.png b/prolog/problems/family_relations/mother_2/Mother-2.png
deleted file mode 100644
index e0179e4..0000000
--- a/prolog/problems/family_relations/mother_2/Mother-2.png
+++ /dev/null
diff --git a/prolog/problems/family_relations/mother_2/Mother-3.png b/prolog/problems/family_relations/mother_2/Mother-3.png
deleted file mode 100644
index e0ea5c1..0000000
--- a/prolog/problems/family_relations/mother_2/Mother-3.png
+++ /dev/null
diff --git a/prolog/problems/family_relations/mother_2/Prolog_mother_01.svg b/prolog/problems/family_relations/mother_2/Prolog_mother_01.svg
new file mode 100644
index 0000000..6f00449
--- /dev/null
+++ b/prolog/problems/family_relations/mother_2/Prolog_mother_01.svg
@@ -0,0 +1,370 @@
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diff --git a/prolog/problems/family_relations/mother_2/common.py b/prolog/problems/family_relations/mother_2/common.py
index d819ef5..d943b9c 100644
--- a/prolog/problems/family_relations/mother_2/common.py
+++ b/prolog/problems/family_relations/mother_2/common.py
@@ -91,6 +91,12 @@ def hint(program, solved_problems):
             'findall(_, mother(X, Y), L), length(L, 50)'):
             return [{'id': 'or_instead_of_and'}]
 
+        # OR instead of AND written with two rules, namely:
+        #    (r1) mother(X, Y):- female(X).  (r2) mother(X, Y):- parent(X, Y).
+        if prolog.engine.ask_truth(engine_id,
+            'findall(_, mother(X, Y), L), length(L, 50)'):
+            return [{'id': 'or_instead_of_and_two_rules'}]
+
         # X must be female
         if prolog.engine.ask_truth(engine_id, 'male(X), mother(X, _)'):
             return [{'id': 'x_must_be_female'}]
diff --git a/prolog/problems/family_relations/mother_2/sl.py b/prolog/problems/family_relations/mother_2/sl.py
index bd4d57e..9e384c0 100644
--- a/prolog/problems/family_relations/mother_2/sl.py
+++ b/prolog/problems/family_relations/mother_2/sl.py
@@ -16,10 +16,10 @@ description = '''\
 
 plan = [
     '''\
-<p><img src="[%@resource Mother-1.png%]" alt="Mama ima otroka in je ženskega spola." /></p>
-<p>Loni naj zbriše imena relacij (parent, mother) s te slike!</p>''',
+<p><img src="[%@resource Prolog_mother_01.svg%]" alt="Mama ima otroka in je ženskega spola." /></p>
+''',
     '''\
-<p><img src="[%@resource Mother-1.png%]" alt="Mama X je starš od Y in je ženskega spola." /></p>''',
+<p><img src="[%@resource Prolog_mother_02.svg%]" alt="Mama X je starš od Y in je ženskega 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>'''
@@ -30,14 +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_female': '''\
 <p>Mama je navadno ženskega spola.</p>
-<p><img src="[%@resource Mother-2.png%]" /></p>
+<p><img src="[%@resource Prolog_mother_03.svg%]" /></p>
 ''',
 
     'x_must_be_parent': '''\
 <p>Mama naj bi imela vsaj enega otroka... torej je starš od nekoga.</p>
-<p><img src="[%@resource Mother-3.png%]" /></p>
+<p><img src="[%@resource Prolog_mother_04.svg%]" /></p>
 ''',
 
     'y_can_be_of_any_gender': '''\