Space Invaders
(Published today, 06:01 by juggler)
Normal Sudoku rules apply.
INVADERS - Each invader sums to 10 with a digit in some orthogonally adjacent cell.
DIFFERENCE BOMBS - Digits connected by a jagged bomb symbol always have the same difference.
TURRETS - Strategically place 3 turrets into cells in the bottom row. Each turret has as many missiles as the digit in its cell, and can pivot to fire them upwards or diagonally. A turret can destroy an Invader on a digit N by shooting it N times.
All Invaders must be destroyed!
Solution code: Cells the leftmost turret could have hit, but didn't (in reading order).
Comments
today, 15:12 by vfig
earth is saved! surprisingly tricky to get started, and surprisinglt intricate at several points on the way. clever use of layered shading!
today, 14:05 by QuiltyAsCharged
Fantastic retro style, plus original logic that is really fun to work out! I love how the turrets appear when shaded.
today, 13:16 by eladv
Wonderful puzzle! I especially loved the constraint "each invader has an adjacent cell that sums to 10 with it". It felt very weak to begin weak, but really added a lot of intricate logic throughout the puzzle, getting gradually stronger and stronger -- a lot like a game of invaders!
@Juggler: The conflict checker seems to think that this puzzle has a king's move constraint (i.e. no two adjacent cells can have the same number).
today, 07:33 by LJ Jamie
That solution code is gnarly, but this was a super cool puzzle! The puzzle was pretty natural to solve even though it was difficult
