[Retros] Shortest checkmates in shortest proof games

[fieberg at gcr.com]

Updated record table - contributions are welcome.
New records / entries are marked (*)
Update due to 8 new SPGs from NDE.

Pawns:
a2    SPG in 5,5 - CF 10/02
b2    SPG in 4,5 - CF 10/02
c2    SPG in 5,5 - CF 10/02
d2    SPG in 4,5 - CF 10/02
e2    SPG in 4,5 - CF 10/02
f2    SPG in 4,5 - NDE 10/02 (*)
g2    SPG in 4,5 - CF 10/02
h2    SPG in 4,5 - NDE 10/02 (*)
Knights:
b1    SPG in 4,5 - CF 10/02
g1    SPG in 4,5 - GF 6/96, NDE 10/02
Bishops:
c1    SPG in 4,5 - CF 10/02
f1    SPG in 3,5 - RS 5/96, CF 10/02
Rooks:
a1    SPG in 4,5 - GD 5/96, NDE 10/02
h1    SPG in 4,5 - CF 10/02
0-0   SPG in 7,5 - OH 5/96
0-0-0 SPG in 7,5 - OH 6/96
Queen:
d1    SPG in 2,5 - JS 6/96, JH 6/96
King:
e1    SPG in 5,5 - CF 10/02 [discovered check], NE 10/02 (*)

Promoted pawns (Q):
a2    SPG in 4,5 - NDE 10/02
b2
c2    SPG in 4,5 - NDE 10/02
d2    SPG in 5,5 - NDE 5/96
e2    SPG in 4,5 - GD 6/96
f2    SPG in 4,5 - NDE 10/02
g2
h2    SPG in 4,5 - NDE 10/02

Promoted pawns (R):
a2    SPG in 4,5 - RS 5/96
b2
c2    SPG in 4,5 - NDE 10/02 (*)
d2
e2
f2    SPG in 4,5 - NDE 10/02 (*)
g2
h2    SPG in 4,5 - NDE 10/02 (*)

Promoted Pawns (B):
a2
b2
c2
d2    SPG in 5,5 - GF 5/96, NG 5/96, NDE 5/96
e2
f2
g2
h2

Promoted Pawns (N):
a2
b2
c2
d2    SPG in 8,5 - PRa 6/96
e2
f2
g2
h2    SPG in 5,5 - PRö 8/94 (sole SPG in 5,5 moves!?)

en passant with pawn:
a2
b2
c2
d2
e2
f2
g2
h2

discovered check:
Qd1/Pc2     SPG in 5,5 - NDE 10/02 (*)
Qd1/Pe2     SPG in 5,5 - NDE 10/02 (*)

double checks:
Qd1/Ng1     SPG in 5,5 - RS 6/96


CF = Christoph Fieberg
NDE = Noam D. Elkies
GF = Göran Forslund
RS = Richard Stanley
GD = Gianni Donati
JS = Juha M. Saukkola
JH = Joost de Heer
OH = Olli Heimo
NG = Norbert Geissler
PRö = Peter Rösler
PRa = Paul Raican