MEPHISTO MANHATTAN 1900 US-ELO FOR ADVANCED PLAYERS.
Picture taken from Mephisto Product Leaflet.
We would like to congratulate you on the purchase of your new MEPHISTO MANHATTAN. This computer offers you an excellent price-to-performance ratio. Although the computer costs relatively little, test games against much more expensive chess computers (also higher rated) have shown that the MEPHISTO MANHATTAN is a very strong partner.
You will probably not have played with a chess-computer before. Despite this you will soon see that your MEPHISTO is simple to operate....... Your computer is the product of German top-technology and design ability. Please treat your computer with care and clean it only with a damp cloth (no detergents).
We of the MEPHISTO team wish you many happy hours with your MEPHISTO chess partner.
MONITORING THE ANALYSIS AND ANALYSIS DEPTH
It is obviously not possible to see what a human opponent is thinking when you are playing or analyzing a game with him. However, this is possible with MEPHISTO! By pressing the INFO key you will obtain two pieces of information concerning what the computer is thinking about.
If you press the INFO key once then the computer will show the coordinates (alternately) of the move which it is considering. Pressing the INFO”\ key a second time you will be able to see the analysis depth via the LED’s which are switched on. The analysis depth is the extent to which the computer has been able to look into the position on the board. The analysis depth is measured in ply. (A ply is a move for White or for Black, two ply equal to one complete move, therefore a ply is a half move). MEPHISTO shows a depth of eight ply on the left side of the board and if it extends this it shows nine ply or more using the LED's on the bottom side of the board towards the right (A1 to H1).
When set to the normal level the computer will show an average of four to six ply into which it has analyzed in advance. In simple situations (especially in endgame situations) the computer can show up to 12 ply. If you set a higher playing level (so that you give the computer longer to analyze) you can see how the analysis depth increases and how the computer considers different moves which it could play. By pressing the INFO key again after having reached the analysis depth phase you return to the analysis phase.
Excerpts taken out of the “Hegener + Glaser Mephisto Manhattan” User Manual
Mephisto Manhattan manufacturer ELO rating chart showing 1900 ELO (USCF)