This is the twenty-fourth instalment of the Fortnightly Topic Challenge described here, with topics suggested and voted on here. This fortnight's topic is grid-deduction(suggested by Deusovi), and will span from the the 9th of January to the 22nd of January. During this period, we will compile the list of questions with this tag and post it as an answer to this question.
In the meantime, please go and propose and vote on future challenges!
Everyone have fun, and happy puzzling!
Link to other Fortnightly Topic Challenges.