Sorry about that... i really thought it was logical, but my last edit must have changed that. The following are all black and should erase the problem: r2/c23 r4/c24 r12/c12-13 & c17 r13/c16.
There are twelve possible solutions, but i found the solution without the hints and using temps. Don't feel bad jo1202, there are much less logical puzzles here.
The following are all black and should erase the problem:
r2/c23
r4/c24
r12/c12-13 & c17
r13/c16.
Dear Jo1202. Please don't just 'think' the puzzles are logical, you must try them.
Thanks.