The Scotsman, who was third in the betting ahead of Greece's John Michael at 5/1 to progress to the next round, had moved his dartboard into his bedroom so he could play in peace and quiet away from his three children - and the strategy worked a treat after an agonising start to the evening.
Murray threatened an unlikely comeback from 4-2 down against group favourite Cullen in the opening fixture before losing out in a last-leg decider but bounced back to seal an impressive 5-3 over Michael with a 121 checkout on the bullseye.
Play begins at 1930 BST each night
Best of nine legs
GROUP 20 - Wednesday May 6
Note: Jermaine Wattimena replaces Jeffrey de Zwaan, who has withdrawn to undergo minor surgery on his shoulder and will not take part in the event
GROUP STANDINGS
GROUP 21 - Thursday May 7
Note: Karel Sedlacek replaces Derk Telnekes, who has withdrawn due to family reasons
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