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* [http://www.talkchess.com/forum/viewtopic.php?t=60512 Zarkov collection available ...] by [[Frank Quisinsky]], [[CCC]], June 16, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=64355 Zarkov 5 Millenium Chess System] by [[Norbert Raimund Leisner]], [[CCC]], June 21, 2017
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=73621 Zarkov 4.20?] by Louis Lev, [[CCC]], April 10, 2020
=External Links=
