[Bug-gnubg] Tutor mode

[Ian Shaw]

Windows build 020804
Tutor mode = Analysis settings =  Expert

    GNU Backgammon  Position ID: 29wBAByz3RkCAA
                    Match ID   : QQmuAAAAAAAA
    +24-23-22-21-20-19------18-17-16-15-14-13-+  O: GnuBg (Cube: 2)
    | O  O  O     O  O |   |                  |  0 points
    | O  O  O     O  O |   |                  |  
    |             O  O |   |                  |  
    |                  |   |                  |  
    |                  |   |                  |  
    |                  |BAR|                  |v 5 point match
    |                  |   |                  |  
    |                  |   |                  |  
    |    O        X  X |   |                  |  
    | X  O  X  X  X  X |   |    X             |  Rolled 43
    | X  O  X  X  X  X |   |    X           X |  0 points
    +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: ian

    1. Cubeful 0-ply    8/5 8/4                      Eq.:  +0.910
       0.874 0.186 0.003 - 0.126 0.006 0.000
        0-ply cubeful [expert]
    2. Cubeful 0-ply    12/5                         Eq.:  +0.869 ( -0.041)
       0.861 0.178 0.002 - 0.139 0.004 0.000
        0-ply cubeful [expert]

12/5 was marked doubtful so I asked for a hint. I did a World-Class++
evaluation which reversed the rankings.

Double clicking on 12/5 to play the move still told me my move was doubtful
and the analysis window only contained the 0-ply analysis.

I can see the logic behind this; I've asked it to Tutor on analysis setings
and that is 0-ply. However, it doesn't play nicely. I can imagine it causing
some confusion. 
I think it would be better if the more thorough evaluation were pasted into
the analysis, too, although I realise it isn't strictly "correct".

_________________

It would be nice if your move was highlighted in red in the hint window.
_________________

At present I've found the best way to use Tutor mode is to use the analysis
settings on Expert level. This gives a very fast response on my PII 266 MHz
PC. I have the evaluation settings on World Class++. This means that from
the Hint window I can easily select a number of moves and click Eval to get
a deeper evaluation. (I'm finding it interesting how often GnuBg changes its
mind BTW.)

I'm wondering about whether it is worth having snmall buttons on the hint
window specifically to do deeper evalualtions E.g. [0] [1] [2] [3], or [<]
and [>].
_________________


If the tutor dialog pops up and you press Rethink the board gets redrawn in
the original position.
If the tutor dialog pops up and you press Hint followed by OK, the board
shows the position after the move. You have to CRTL+Z to get back to the
start position.
I think this inconsistency might be confusing. 
_________________

The command set tutor eval on|off is counter-intuitive.
set tutor eval on uses the evaluation settings
set tutor eval off uses the analysis settings

It should work the other way round.


Ian Shaw