Complex sentence: Initially, it seemed the Sonata would have to be abandoned, but Ysaÿe and Bordes-Pène decided to press on regardless, and in the event they had to play the last three movements in virtual darkness, from memory.
Split into simpler sentences: Initially, it seemed the Sonata would have to be abandoned, but Ysaÿe and Bordes-Pène decided to press on regardless. In the event, they had to play the last three movements in virtual darkness, from memory.