### TSLI / Heyawake

I’m not sure if today’s puzzle enritely qualifies as a double, since one puzzle uses numbers while the other doesn’t.

TSLI is a LITS variant. TSLI is to LITS as Pata is to Tapa, hence the naming.

I actually made the TSLI first, and as an afterthought decided to make a Heyawake with the same grid. It’s the first Heyawake I’ve made, and considering how much trouble I have solving Heyawakes, it turned out surprisingly good.

TSLI rules:

- Shade some cells to form a continuous wall that contains no 2×2 squares of shaded cells.
- Each region contains exactly four unshaded cells, and they must form an L, I, T or S tetromino. Tetrominoes of the same shape may not share an edge.

Heyawake rules:

- A region’s clue tells exactly how many shaded cells it contains. Unclued regions may have any number of shaded cells (including zero).
- Two shaded cells may not share an edge.
- The unshaded cells must form a single, continuous polyomino.
- No continuous line of unshaded cells may pass over two or more region borders.
- To clarify the last rule, the scenario below is illegal, but the one below it legal.