Play a game of chess against Lozza. By default you will be playing with the white pieces. Use the Play menu to change colour and start or restart a new game with with the black or white pieces. You can do this at any time.
You can change how well Lozza plays at any time - including during a game - by using the Strength menu. If you find you are making mistakes, try using a lower strength.
While Lozza is thinking some information is shown above the board and after Lozza has moved the information will look something like this:-
1 s | 948.29 kn | 947.34 kn/s | 0.1%
1 s is the time lozza took to move. 948.29 kn can be thought of as the total number of moves Lozza analysed while making her move. 947.34 kn/s is the number of moves analysed per second. 0.1% is the percentage of her internal memory used so far.
The Analyse button will open a new web page allowing you to analyse the current position. Both web pages will be active. It's easier to bounce between play and analyse pages using a laptop rather than a phone.
c=b
You play black. Default is you play white.
l=1 to 10
Sets the initial strength. Default is level 1 (l=1)
fen=fen
Use the specified FEN string to start the game from. The default is the standard start position.
m=ucigocommand
Lozza uses the given UCI go command to make her move rather than that for the selected level. For example to ask Lozza to search to a depth of 2 ply only use:-
https://op12no2.github.io/lozza-ui/play.htm?m=go depth 2
Another example, to ask Lozza to make her move after searching 100000 nodes, use:-
https://op12no2.github.io/lozza-ui/play.htm?m=go nodes 100000
To make Lozza move after a certain time specify the time in milliseconds, e.g. 200ms use:-
https://op12no2.github.io/lozza-ui/play.htm?m=go movetime 200
When the m parameter is present the strength menu has no effect.