Cluster No. 1:

Noonian                        (9)
Golem01                        (9)
Ozwald                         (9)
Raffaela                       (9)
SnailSCP                       (9)
Storm                          (9)
TSCP                           (9)
Zephyr                         (9)
LarsenVB                       (9)
Monik                          (9)

10 programs, 180 games

itoffset = -3.764739


Cluster No. 2:

Chessterfield                  (11)
Averno                         (11)
Cilian                         (11)
ColChess                       (11)
Crux                           (11)
DChess                         (11)
Faile                          (11)
Freyr                          (11)
Gully2                         (11)
NewRival                       (11)
Sjeng73                        (11)
SSEchess                       (11)

12 programs, 264 games

itoffset = -4.925706


Cluster No. 3:

Amyan                          (11)
Ant                            (11)
Dragon                         (11)
ExChess                        (11)
Fortress                       (11)
gnuchess                       (11)
GNUChess4                      (11)
InmiChess3                     (11)
Knightx                        (11)
lambChop                       (11)
LDBlanche                      (11)
ArasanX                        (11)

12 programs, 264 games

itoffset = 0.766986


Cluster No. 4:

Amy                            (13)
AnMon                          (13)
Bringer                        (13)
Comet                          (13)
Crafty                         (13)
Francesca                      (13)
Gromit2                        (13)
Gromit3                        (13)
LGoliath                       (13)
Phalanx                        (13)
SOS                            (13)
TCBishop                       (13)
Yace                           (13)
ZChess                         (13)

14 programs, 364 games

itoffset = 0.228376