Complex sentence: Games between skilled players often end up temporarily deadlocked, since the square Go board allows a "four corners" configuration where neither side can strongly connect; however, since players cannot pass, they eventually must start filling in the internal liberties of their groups.
Split into simpler sentences: Games between skilled players often end up temporarily deadlocked, since the square Go board allows a "four corners" configuration where neither side can strongly connect. However, since players can't pass, they eventually must start filling in the internal liberties of their groups.