Table:
tuning system
definition of diminished second
size

difference between semitones
equivalent to
cents
ratio

pythagorean tuning
m2 - a1
opposite of pythagorean comma
-23.46
524288:531441

1/12-comma meantone
m2 - a1
opposite of schisma
-1.95
32768:32805

12-tone equal temperament
m2 - a1
unison
0.00
1:1

1/6-comma meantone
m2 - a1
diaschisma
19.55
2048:2025

5-limit tuning
s3 - s2

1/4-comma meantone
m2 - a1
(lesser) diesis
41.06
128:125

5-limit tuning
s3 - s1

1/3-comma meantone
m2 - a1
greater diesis
62.57
648:625

5-limit tuning
s4 - s1

19-tone equal temperament
m2 - a1
chromatic semitone
63.16
2^(1÷19):1

Statement: twelfth-comma meantone has -1.95 cents, the opposite of a schisma.
Question: how many cents did twelfth-comma meantone have the opposite of a schisma?
Answer: -1.95