10 COM X[103,22],M[19,19],U[19,19],Q[20],V[20],P[78] 30 COM M$[60],N$[72] 40 COM N,K,N8,K8,N9,K9,Q9,Q7,Q5,Q4,Q3,Q2,Q1 45 COM I3,I4,U9,X$[20] 50 REM:12JUN74 52 REM:>EXPL FOR 56