I'm astonished. How do you know this? And what do you mean "in the modern sense"?
Well, of course Capa would have studied endgames... but back then it was more like analyzing your games + the few top level games you could get your hands on and then publishing your analysis for others to pick apart. Then you'd go to your study and either make endgame compositions to publish or just compositions to study. You'd work it out yourself.
Modern study means getting an endgame book and working through all the analysis while playing practice positions vs your GM buddy or a computer.
But of course it's well known Capa was anything but a workman when it came to study -- he said so himself that chasing girls and baseball were more interesting to him than taking chess seriously. He's known for his supreme natural talent and lack of a work ethic, so that's how I "know" even if it is technically just an educated guess.


Do you have any idea how many people would love to be able to see and especially appreciate chess the way you do? I'm like the guy who lost his reading glasses and went looking for them in the dark. My chess vision is quite dim, like a knight on the rim is dim.
I'm astonished. How do you know this? And what do you mean "in the modern sense"?