OK, I keep reading about the differences in how the evaluation is what makes Igor etc different.Fernando wrote:Ivan the Terrible, another Excalibur incarnation about which we have not discussed a thing, do show also moves, eval, etc.mclane wrote:My einstein chess wizard also Shows evaluation. But the strange thing is, it shows it always from the point of view of the opponent. I do not know many computers that do it that way. So when computer is 1 pawn ahead Einstein says -1 no matter if Einstein has white or black. It is also no difference if Einstein computes or not. E.g. Novag computer show Evals from their OWN point of view and Change sign when opponent is to move.Fernando wrote:Alexandra does. depth rarely goes beyond 6 in middle game. Evaluation is decent.mclane wrote:It can be that the program in the Alexandra/Igor/grandmaster is stronger than spracklens 6502 machine from 1980, the Excalibur machines use h8 cpu.
This cpu boosts the program.
It's of course difficult to identify the programmer. Biggest problem imo is that these Excalibur machines do not show evaluation and search depth during search.
Igor and grandmaster do NOT show depth or Evals while computing.
You can ask info when it's humans move, but the. You interrupt permanent brain, next move computer begins search from beginning.
Try playing level 94 and 1. e4 e5 2. Ba6 and watch CXG Legend for about a minute by hitting INFO TWICE then ANALYSIS ONCE then finally INFO ONCE and you get the rotating display which shows the analysis.
If you watch it for a minute you will see that the rotating display takes 10 seconds to go through its sequence. Also you will see that the evaluation says 3.16 from the computer's perspective therefore after about a minute just stop by hitting move and the computer will now play 2. ... Nxa6. Therefore with LEGEND you can only evaluate moves while the computer is thinking.
With IVAN it is different because with IVAN you can only see the evaluated moves while you the human player is thinking, therefore you have to play moves 1. e4 e5 2. Ba6 now wait for sixty seconds and then press move. IVAN will now play 2. ... Nxa6.
Now immediately hit INFO BUTTON TWICE followed by more INFO BUTTON presses you will see the Evaluation 3.2.
Well 3.16 if you have two digits on the display would also equal 3.2 if you have 1 digit after the point available on your display so no difference here.
Now after you have played out IVAN's move 2. ... Nxa6 and after you have checked the display through repeated presses of the INFO key. Hit MOVE to get IVAN thinking again. You will see that the display starts thinking about its move. At this point while IVAN is thinking try to hit INFO key repeatedly. On my IVAN the display freezes and it gives you the feeling that it has seized. Well you can snap it out of this by hitting the MOVE key and it will respond by playing its move. After this it will continue to function normally again.
So therefore in summary:
1) Legend displays analysis while computer is thinking. Ivan displays analysis while human is thinking.
2) All Horvath's and Excalibur Ivan, Igor and Mirage use the repeated hitting of the INFO to get to their analysis.
3) Both show similar analysis but IVAN has 1 decimal behind the point and LEGEND has 2 decimals behind the point on their displays. Where LEGEND shows 3.16 and IVAN shows 3.2.
4) All Horvath's and Excalibur Ivan, Igor and Mirage, show the evaluation through the eyes of the computer. How many other programs that you know do this?
5) IVAN freezes when you try to hit INFO repeatedly while it is thinking. This kind of really makes me wonder if it is not searching for the missing command and it is no longer there. So the computer says "OK I am looking for the "ANALYSIS" button press. Where is it?" "Come on human press the analysis button!" "where is it?" The computer is frozen because it is looking for something that is not there. Now press "MOVE" again and IVAN snaps out of it.
So as a result even the analysis argument does not work for arguing against Horvath. It in actual fact continues to favor Horvath if you were all just spend a few minutes to think through all the similarities.
Sorry to disappoint regards