Solution

     Which part are you going to start ?

Problem 1.After ( N1,M1), J1, then ( S2,Q2,,T2,P1,R2,O1)

Problem 2. The first stone, S1, is important.  If you put stone at R2, you miss the part.  Against C3, ( D2,B3,B2,A2,C4,B4,C5,F5,B5,A3,A5,B1,A4,D1,A1)

Problem 3. After ( O2,P2,O1,K4,M1 or N1),( T7,T5,T4,T8,S6,S4).

Problem 4.( O6,N6,O4,N3,M8,N7,N9,P8,O8)

Problem 5. ( P3,T2,S2,A2,B1,E6,.........)