You may only split a pair (two sixes or two 10-rank cards).
https://talkingpoints.org/subx/showthread.php?tid=23021
http://forum.bandingklub.cz/viewtopic.php?f=48&t=1312157
http://forum.bandingklub.cz/viewtopic.php?f=44&t=1116255
http://foro.goatenerife.es/viewtopic.php?f=17&t=32632
https://neoternia.net/viewtopic.php?p=421965#p421965
https://one-diz.3dn.ru/forum/12-14852-1#21107
https://45.83.123.20/viewtopic.php?t=13207
https://talk.hyipinvest.net/threads/272842/#post-613406
https://debate.socialism.nl/forum/showthread.php?tid=245761
http://horsecity.ru/phpBB3/viewtopic.php?f=33&t=240415
https://talk.hyipinvest.net/threads/266836/
http://forum.bandingklub.cz/viewtopic.php?f=42&t=1372015
http://qrfonline.qrfmag.com/qrfswap/viewtopic.php?t=122481