Einstein Island

This game looked like a logic grid game at first, but it turns out it's more of a graphical Sudoku puzzle.  The levels start off with a 5x5 grid and 5 icns you have to place on the map.  Each row or column can only have a single icon.  The bottom of the screen has the key to what can go where, and you can click each of those hints to get an explanation for what the graphics are trying to tell you.  Maybe the spyglass goes on a desert space and the chest cannot be adjacent to a volcano.

You can view the tutorial to see how the controls work, how you can put placeholders on the map to help you eliminate wrong choices.

Scrolling through the various screens, it looks like these can get very complicated.  Some of the later puzzles have 6x8 to 8x8 maps with multiple colors of icons, where each color has the "one icon per row/column" rule, essentially two puzzles overlaid on the same space.  So there are definitely some challenges here.  It's just not a type of game that normally keeps my attention for long.