I saw Josep María Miró's EL PRINCIPIO DE ARQUÍMEDES (funny story).
The book wasn't anything out of this world, but the directing and this version's cast (Guido Vecchiola, Katty Kowaleczko, José Antonio Raffo and Vittorio Yaconi) are good enough. I'm not against open endings, but this one felt like the writer didn't know how to keep going. In fact, the plot is the set-up for a bigger conflict, so it feels like they settled on a not-so-big conflict.
Funny story: The change of lights showed the 1st flashback. When the 2nd flashback happened, the lights didn't change at all. I thought there was a technical problem. During the final scene, the actors remain in silence for a few seconds until someone in the audience began to applaude. We all joined him. As he was applauding, he went to the stage. It turns out he was a technician. He said that a car had crashed and there was a blackout on the whole neighborhood. The "main" lights had a generator, which is why they never turned off. Believe it or not, this was a nice addition to the play. The actors proved how professional they were by deciding (on their own) to keep going. They told us the audience how nervous they were and thanked us for our patience and support.