Problem:
Old window in bathtroom had a VERY thick sill
Therefore there is tile hiding most of the old sill
I have removed the old window and sill.
I now have about 2 " of wlll tile above where the new window sill is to
go

How do I cut the excess tile off ?
I have about 34 linear inches to cut.
Also:
One corner, access to the wall is limited because of the soap dish next
to the wall
Buildup of cement/mortar varies from 1" to 2" thick along the area that
needs to be cut
There appears to be some sort of wire mesh in the cement/mortar

Is there a saw blade that can be used for this using one of
1) Jig saw ?
2) Reciprocating saw ?
3) Hand held saw ?
4) Anything else ?