diff --git a/encodings/pddl-sequential-horizon-boolean.lp b/encodings/pddl-sequential-horizon-boolean.lp
new file mode 100644
index 0000000..03c2605
--- /dev/null
+++ b/encodings/pddl-sequential-horizon-boolean.lp
@@ -0,0 +1,28 @@
+#const horizon=1.
+
+step(0..horizon).
+
+ precondition(Action,variable(Fluent),Value) :-  precondition(Action,                      variable(Fluent),value(Fluent,Value)).
+postcondition(Action,variable(Fluent),Value) :- postcondition(Action,effect(unconditional),variable(Fluent),value(Fluent,Value)).
+
+holds(variable(Fluent),0) :- initialState(variable(Fluent),value(Fluent,true)).
+
+ { occurs(Action,T) : action(Action) } = 1 :- step(T), T>0.
+
+:- occurs(Action,T), precondition(Action,Fluent,true), not holds(Fluent,T-1).
+:- occurs(Action,T), precondition(Action,Fluent,false),    holds(Fluent,T-1).
+
+caused(Fluent,T) :- occurs(Action,T), postcondition(Action,Fluent,true).
+
+holds(Fluent,T) :- caused(Fluent,T).
+holds(Fluent,T) :-  holds(Fluent,T-1), not occurs(Action,T) : postcondition(Action,Fluent,false); T<=horizon.
+
+goalAt(T) :-     holds(variable(Variable),T) : goal(variable(Variable), value(Variable,true));
+             not holds(variable(Variable),T) : goal(variable(Variable), value(Variable,false));
+	     T=horizon.
+
+ :- not goalAt(horizon).
+
+#show occurs/2.
+% #show holds/2.
+