(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
DT[2006-02-04]AW[ga][ia][ka][pa][hb][ib][kb][lb][mb][nb][pb][qb][rb][sb][ic][jc][lc][qc][dd][id][ld][qd][rd][df][ng][ph][pi][qi][ri][dj][qj][rk][ql][qm][rm][co][hp][ip][dq][hq]AB[ja][oa][ra][gb][ob][gc][hc][kc][mc][oc][pc][hd][jd][kd][md][pd][fe][ie][je][le][ne][pe][qe][re][qf][qg][qh][pj][ok][pk][qk][pl][pm][jn][qn][qo][jp][iq][jq][pq]LB[dh:A]C[Question: 

In that position, I wanted to reduce white on the left , and I played A, is that move correct? If it's correct, how should white answer and if not, where on the left side should I play in that position?

]PL[B]
(;B[dh]CR[dh]C[Right now the area around A is not the biggest point.]
;W[eg]CR[eg]
;B[eh]CR[eh]
;W[fh]CR[fh]
(;B[ej]CR[ej])
(;B[fi]CR[fi]
;W[ei]CR[ei]C[Black is cut.])
(;B[ei]CR[ei]C[Black has to run with an ugly shape.]))
(;B[hn]CR[hn]C[H6 is bigger, it reduces white's lower left side and develops black's moyo.])
(;B[dg]CR[dg]C[To reduce white, d13 is better.]
;W[cf]CR[cf]
;B[fg]CR[fg]
;W[hm]CR[hm]C[But white will get the biggest point at h7.]))