Double down is allowed on any two cards as in Atlantic City Blackjack but only one additional card will be dealt but double down after a split is allowed.
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https://debate.socialism.nl/forum/showth...tid=196178
https://debate.socialism.nl/forum/showth...tid=192349
http://horsecity.ru/phpBB3/viewtopic.php?f=19&t=151330
http://horsecity.ru/phpBB3/viewtopic.php?f=7&t=166102
http://www.20hz.ca/boards/viewtopic.php?t=76017
https://debate.socialism.nl/forum/showth...tid=156319
http://www.prepody.ru/topic59507.html
http://sharecovid19story.com/viewtopic.php?t=2749706
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http://forum.bandingklub.cz/viewtopic.ph...&t=1368348
https://ossoba.com/forums/index.php?topic=648.new#new
https://www.ww2.site/forum/viewtopic.php?t=76104
http://www.20hz.ca/boards/viewtopic.php?t=81465
http://biopharmamash.com/viewtopic.php?t=1016734
http://forum3.bandingklub.cz/viewtopic.p...&t=1229444
http://forum.fretky.cz/info-f46/live-rou...75582.html