As for "Tchigorin, Capablanca and Lenin": photos of Ulyanov's chess table on the internet show a board with 160 squares, i.e. the western variant with 3 additional rows, and no fortresses. Information on Capablanca, I suspect, is due to mixing up double chess (which Capablanca did play indeed), and four-handed chess. No idea about Tchigorin but I doubt it.
Please check my 2015 paper on this game in Board Game Studies Journal 9, pp. 41-49: http://bgsj.ludus-opuscula.org/PDF_Files/41_49_Markov_web.pdf
As for "Tchigorin, Capablanca and Lenin": photos of Ulyanov's chess table on the internet show a board with 160 squares, i.e. the western variant with 3 additional rows, and no fortresses. Information on Capablanca, I suspect, is due to mixing up double chess (which Capablanca did play indeed), and four-handed chess. No idea about Tchigorin but I doubt it.