N(3,3)
Chess on an Infinite Plane (ChessNerd1836 - captaintugwash)

15.N(3,3)...H(7,4)
16.Q(-16,-19)...Hx(10,1)
17.G(9,0)
(Black material lost: --) (White material lost: R)

17.G(9,0)...Hx(8,3)
18.Bx(8,3)...(5,6)
19.N(6,3)...C(11,7)
(Black material lost: H) (White material lost: RC)

Is that move accurate? Feel free to double check your coordinates and clarify if you meant to move to a different square.
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14... B(9,14)