% Francois Labelle & computer, January 19, 2004
% All 10 at home PG-4.0 with exactly 1 solution.
% They are all SPGs.

% Comment:
%
% They are all rediscoveries.
% (see http://anselan.com/CHEB.html)


(Forsyth-Edwards Notation, followed by the same list in ascii diagrams)

SPG-4.0:

rn1qkbnr/ppp1pppp/8/8/8/8/PPPPPPPP/R1BQKBNR
rnbqkbnr/ppp1p1pp/8/8/8/8/PPPPPPPP/R1BQKBNR
rnb1kbnr/pp2pppp/8/8/8/8/PPPPPPPP/R1BQKBNR
r1bqkbnr/ppp2ppp/8/8/8/8/PPPPPPPP/R1BQKBNR
rnbqkb1r/ppp2ppp/8/8/8/8/PPPPPPPP/RNBQKB1R
1nbqkbnr/pppp1ppp/8/8/8/8/PPPPPPPP/RNBQKB1R
rn1qkbnr/ppp1pppp/8/8/8/8/PP1PPPPP/RNBQKBNR
rnbqkbnr/ppppppp1/8/8/8/8/PPPP1PPP/RNB1KBNR
rnbqkbnr/pppppp1p/8/8/8/8/PPPP1PPP/RNB1KBNR
r1bqkbnr/pppppppp/8/8/8/8/PPP1PPPP/RN1QKBNR

 _________________ _________________ _________________ _________________ 
|                 |                 |                 |                 |
| r n . q k b n r | r n b q k b n r | r n b . k b n r | r . b q k b n r |
| p p p . p p p p | p p p . p . p p | p p . . p p p p | p p p . . p p p |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| P P P P P P P P | P P P P P P P P | P P P P P P P P | P P P P P P P P |
| R . B Q K B N R | R . B Q K B N R | R . B Q K B N R | R . B Q K B N R |
|_________________|_________________|_________________|_________________|
|                 |                 |                 |                 |
| r n b q k b . r | . n b q k b n r | r n . q k b n r | r n b q k b n r |
| p p p . . p p p | p p p p . p p p | p p p . p p p p | p p p p p p p . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . | . . . . . . . . | . . . . . . . . |
| P P P P P P P P | P P P P P P P P | P P . P P P P P | P P P P . P P P |
| R N B Q K B . R | R N B Q K B . R | R N B Q K B N R | R N B . K B N R |
|_________________|_________________|_________________|_________________|
|                 |                 |
| r n b q k b n r | r . b q k b n r |
| p p p p p p . p | p p p p p p p p |
| . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . |
| . . . . . . . . | . . . . . . . . |
| P P P P . P P P | P P P . P P P P |
| R N B . K B N R | R N . Q K B N R |
|_________________|_________________|