Monday Mutant 107: Streampunk / Tetra Firma

Shade in tetrominoes such that the black cells are all connected to each other through their edges, and no 2x2 cell area within the grid contains all black cells. No two congruent tetrominoes may share an edge, even if they are rotated or reflected versions of each other. Numbers in a cell indicate the sizes of the orthogonally contiguous groups formed by black cells sharing a corner or an edge with that cell. For example, "3" means that the cell shares a corner or an edge with three black cells, and they form a single group, whereas "1 3" means the cell shares a corner with four black cells which form a group of three cells and a single separate cell. Cells with numbers cannot be black.


prasannaseshadri said...

Is it just because I'm sleepy, or is this tougher than the other ones you've made? The Tetra Firma took over more than usual, and I liked the top and bottom parts most.

Grant Fikes said...

prasannaseshadri: I usually refrain from grading the difficulty of my own puzzles, aside from "these are the easiest", but this one is definitely on the tough side.

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