The comment system on my site "misbehaved" causing the following comment to get lost in cyberspace. I liked the citation but unfortunately do not know who posted it. Sorry for the inconvenience!

Original comment:

"We do not recommend the Colle system as the best opening, but as the easiest good opening... The Colle is the safest of all opening systems for White, and yet it is designed for kingside attack and therefore seldom leads to dull games" ~C.J.S. Purdy, the 1st World correspondence chess champion

Thank's for bringing it to my attention again...

Good game by the way

We do not recommend the Colle system as the best opening, but as the
easiest good opening... The Colle is the safest of all opening systems for White,
and yet it is designed for kingside attack and therefore seldom leads to a dull games.
C.J.S. Purdy, the 1st World Correspondence chess champion

There are two common mistakes made when considering the history of the Colle system.
The first is in attributing to Edgard Colle investigation of the system. There is no
doubt, Colle did a lot for the opening, but it was a weapon he chose from the armory
of his great predecessors. Chess historians attribute "Colle move order" to the XIX
century British player William Norwood Potter, who played 1.d4, 2.e3, 3.Nf3, 4.Bd3
in 1875, but it was not a system yet. The real ideas behind the Colle system were
shown at the end of the XIX century in games of Rudolf Charusek as White and Mikhail
Chigorin as Black (later called Semi-Slav, dark-skinned brother of the Colle). At
the beginning of the XX century we find Pillsbury, young Capablanca and Alekhine
occasionally playing the "Colle" system, and after the Great War - Reti, Rubinstein
and Vidmar.

The second mistake is a wide-spread dividing the Colle opening into so called
"Colle-Zukertort" and "Colle-Koltanowski" systems. The difference is in pawn chain
and dark-squared bishop position. The first means pawns b3 and c2 and Bishop b2, the
last - pawns b2 and c3 and bishop on its original square c1. Adam Harvey, an author
and compiler of the notable book "Colle plays The Colle System" (Chess Enterprises,
2002) indicates: "In researching all of the extant games as Colle played as White
from 1922-1932 I have found that in none of these did he adopt the Zukertort
Opening. In all of games where Colle reached a position after 1.d4 d5 2.Nf3 Nf6 3.e3
e6 4.Bd3 c5, he invariably played 5.c3… If one looks at the literature on the
so-called Colle-Zukertort system, there is only one game by Colle is ever mentioned…
However this game is not the genuine article, as Black does not play d7-d5. Whilst
there are some similarities to the Zukertort opening… what Colle actually plays is a
variant of his own set up against Queen Indian set-up for Black… In view of the
above it is clear that the titles "Colle-Zukertort System" or "Colle system,
Zukertort Variation" are misnomers. If anyone should be credited with developing
this opening after Zukertort`s death, then Akiba Rubinstein, who played it
regularly… would be a better candidate". So we have two different systems: Colle
or Colle-Koltanowski system and Zukertort or Zukertort-Rubinstein system.

From ChessBase's the Colle System training CD

Thank's for bringing it to my attention again


Good game by the way