Click on any candidate in the board. The solver will set that candidate as true and turn false all the candidates it can see in the row, column and box. It will then look at all those in turn and follow every inference, ON, OFF, ON, OFF until it can go no further or it his the depth level set by the slider. A network of chains will be built up that could help you solve a difficult point in the puzzle.

Cells highlighted in yellow will show contradition allowing a definite elimination. Only the first is shown although there might be several.

Use the [SHIFT]+(click) on another candidate to add another set of chains to the board. The slider will only change the last chain/net.
See this page on Forcing Nets.

New Rating system discussed here

Help on Killer Definitions used in this solver for transporting puzzles

Quick help: Using this Solver

You can pick examples from the list above. Click on Take Step to step through the solution. Unknown squares are filled with 'candidates' - possible solutions.
Any cells that are reduced to one possible candidate are solved.

You can enter a new Killer puzzle using the new 'designer' - click on "Enter new Killer". Once you fill in the clues and set up the cages correctly it can be solved.

Unlike the other solvers you can only edit the main board when solving. The small board only displays the clues.