Squidoku

Instructions:
Complete the grid so that there is a unique tile in every row, column and grid!

LEFT click a cell to place the tile in your hand
SHIFT+LEFT click to toggle a note
RIGHT click to toggle a note/remove all notes via the menu

Keyboard shortcuts:
1-9 select tile
SHIFT+1-9 show only that tile
CTRL+1-9 toggle tile visibility

You can save your game from the quit menu and carry on later if your brain gets strained!