AVRAHAM
42/43 sharing the same platform is not correct: The tracks 41/42 (westbound) and 43/44 (eastbound) are actually sharing the same platform in that underground station at Zurich HB. One of the two available tracks per platform will be “randomly” used by the S12, depending on the current traffic and delay situation.
The S12 heading to Winterthur / Schloss Laufen always departs on platform 43/44 (unless Hell freezes over), so make sure NOT to take the escalators down to 42, although being the answer to life, the universe and everything 😉