We "tossed the ball" in this game, meaning I made a losing move and my opponent reacted with a losing move. I believe I should have played |28.n21 then for example 29.l18 30.l22 31.i19 32.g16 33.g18 34.e15 and I threaten to win from two directions, as in the game. After M21 my opponent could have won with |29.p20 for example 30.o19 31.n19 32.m18 33.l18. Fortunately white G19 allowed me to get back on track with |30.g16. If |31.g13 32.l18 33.p20 34.o19 35.n19 36.m18 and white is cut off.