Derek Nalls wrote on Sun, May 11, 2008 10:05 PM UTC:
Before Scharnagl sent me three special versions of SMIRF MS-174c compiled
with the CRC material values of Scharnagl, Muller & Nalls, I began
playtesting something else that interested me using SMIRF MS-174b-O.
I am concerned that the material value of the rook (especially compared to
the queen) amongst CRC pieces in the Muller model is too low:
rook 55.88
queen 111.76
This means that 2 rooks exactly equal 1 queen in material value.
According to the Scharnagl model:
rook 55.71
queen 91.20
This means that 2 rooks have a material value (111.42) 22.17% greater than
1 queen.
According to the Nalls model:
rook 59.43
queen 103.05
This means that 2 rooks have a material value (118.86) 15.34% greater than
1 queen.
Essentially the Scharnagl & Nalls models are in agreement in predicting
victories in a CRC game for the player missing 1 queen yet possessing 2
rooks. By contrast, the Muller model predicts draws (or appr. equal
number of victories and defeats) in a CRC game for either player.
I put this extraordinary claim to the test by playing 2 games at 10
minutes per move on an appropriately altered Embassy Chess setup with the
missing-1-queen player and the missing-2-rooks player each having a turn
at white and black.
The missing-2-rooks player lost both games and was always behind. They
were not even long games at 40-60 moves.
Muller:
I think you need to moderately raise the material value of your rook in
CRC. It is out of its proper relation with the other material values
within the set.