He said "I have to call" and put
some chips in the pot....that"s what this rule was made for.
RRoP (see
here)tries to be as broad and yet as specific as possible and we could go round and round about what"s a call and what isn"t.
Deliberately putting chips in the pot, to my mind, commits ONLY those chips in this situation, as I said, I would have given him the option of losing the 1500 and folding or calling the whole 15k.
Is this open to abuse....absolutely...it"s a possible angle-shot (see 2+2) and should be stamped on hard if that"s the way it appears but it certainly seems to me that the player here did NOT understand the amount he had to call and should be given some flexibility.
Or not...each to their own. The player didn"t help himself by protecting his action/hand by clearly understanding the whole scenario.
On the APAT's rules front...there is nothing specific on point but they can be found from the home page or by clicking
HERE.