In another puzzle, blue lines might suggest water, or a serene sky, but I can’t help but think of them here as shards of glass. Be careful!

Perhaps someone’s a little tipsy, but they’re watching over you as you solve this puzzle.

Those are some pretty small numbers in those cages. Almost too small. Almost. I’ve been doing “Sudoku-X” puzzles almost as long as I’ve been doing Sudoku puzzles, but around these parts, we call those “diagonals.” If you’re feeling a bit of déjà vu, see also: High Killer X.

Those are some pretty big numbers in those cages. Almost too big. Almost. I’ve been doing “Sudoku-X” puzzles almost as long as I’ve been doing Sudoku puzzles, but around these parts, we call those “diagonals.” If you’re feeling a bit of déjà vu, see also: Low Killer X.

White Kropki dots are simple, and there are only a couple of them. XV clues are more interesting, and there are a lot of those. Still not enough to make it clear how to solve the puzzle, but that’s because of the global constraint. This puzzle demonstrates an overt bias against knights: no knight’s moves allowed!

Arrows point this way and that, and you’re seeing double more often than not, but this shouldn’t pose a problem for you. You’re savvy. You know which way the arrow’s pointing.

Senior year is here, and you’ve really made a home for yourself on campus. You’ve now mastered The Quad. You take shortcuts across the quad to get where you need to go, and it helps you avoid people–and given digits.

Sophomore year was fun, but now you’re out ofGAS and stuck on campus over the break. The one constant is The Quad. Someone has cleared out some of the old shrubbery and planted some new flowers, but it’s still the same old Quad you know and love. It almost makes having no place to go home to bearable.

Sophomore year isn’t quite the GAS that freshman year was, but you still enjoy The Quad. It seems different. Not much, but they say you can’t step in the same stream twice, and enough has changed to make the campus slightly less welcoming than it was.

Freshman year is a GAS. The campus feels new and fresh, and you are learning important things. Like that big four-sided area there in the middle of campus, that’s The Quad.