Kibitzer
Menu Engine – Add Kibitzer (Ctrl-K)
A "Kibitzer" is a person who watches a game in progress without making any moves himself. A kibitzer is also notorious for giving advice and knowing everything better.
You can add a kibitzer by selecting an engine in the select box that appears.
A new engine window appears in which it can work parallel to the one already loaded. You can use one or more kibitzers (up to six) to help you in your game against the primary engine, or you can use them for a second opinion on a position you are analysing. Remember that they will be sharing the processor power, so the quality of analysis sinks with every added kibitzer.
Click “Remove kibitzer” or “Remove all kibitzers” to close the additional engine. You can also right-click a kibitzer and “Close” it.
Kibitzer cannot be combined with the "Explain all moves" window.