(;GM[1]FF[3]RU[Japanese]SZ[19]
HA[0]KM[0.5]PW[Steve Kroon 5k]PB[David Richfield 6k]
GN[Steve Kroon 5k (W) vs. David Richfield 6k (B)]DT[2005-03-18]SY[Cgoban 1.9.12]TM[-]
C[I'm Thomas Chaboud, 3d in France, greetings all.
Still a weak amateur, so please don't forget to take a grain of salt with my comments. ]
;B[qq]
;W[pp]C[According to standard theory, this W2 is not very good, occupying an empty corner is better. Several arguments, among which...]
(;B[pq]C[Good direction \:)]

;W[oq]C[This move just does not work, does it ? W'a' or 'b' are mandatory, else B plays 'a'. Here...]LB[op:a][np:b]
(;B[qp]LB[op:a]C[A real pity David missed the severe 'a'.]

;W[op]C[Now it's nearly a normal exchange, though slightly favourable to B, I guess.]

;B[pd]C[It's not a matter of much, but... wrong direction, I'd say. The East side is already undermined by B5, hence less interesting than the South. Furthermore, the hoshi B7 wants to develop on a large scale, and W2-6 hinder a B moyo in the East. 'a' or 'b', perhaps. ]LB[dp:a][eq:b]

;W[dp]C[Good direction, then.]

;B[dc]C[This reminds one of Kajiwara's comments in "Direction of play" \: why give W his favoured side to approach from ('a' or 'b', for instance) ? I'd prefer B9 at 'c', 'd' or 'e'.]LB[de:a][df:b][dd:c][cd:d][ce:e]

;W[de]C[Feels good.]
;B[fd]
;W[dh]C[It's often better to play the forcing 'a'-'b'-'c', then  'd'. Else, W12 directly at 'e', maybe ? Idon't really think this W12 is bad, though.]LB[cc:a][cb:b][cd:c][ch:d][dj:e]
;B[jd](;W[pf]C[Not a very good direction, as before, because of B5, and no way to close that side; besides, the shape is wrong. W14 is badly linked to the sansan. If B just replies at 'a' or 'b', he's had the better of the exchange. Then, the best W does locally is 'c'-'d'-'e'-'f', bad shape for W (equivalent to pushing through the 7-'f' keima without cutting), points and strength to B. This high approach of a hoshi is the exception, played only as a shicho breaker, or when W absolutely wants the side (of little value in this case) and no B pincer\: it's usually bad for B not to answer at 'a' or 'b', because W14 and W'b' make the most severe hasami against a hoshi. W14 at 'g' is very natural. As regards the NorthEast corner, W should just wait for the right moment to invade at 'd' or 'h', i.e., later.]LB[nc:a][nd:b][qd:c][qc:d][qe:e][rc:f][jp:g][lc:h]

;B[ph]C[Wrong direction, then, and trouble to come.]
;W[nc]	;B[oe]
;W[pj]C[This helps neither of W weak stones... 'a'-'b'-'c' instead, maybe.]LB[pb:a][qc:b][lc:c]

;B[of]C[Good.]
;W[qo]	;B[ro]	;W[qn]
;B[fq]LB[rn:a][cn:b]C[I'd push once more at 'a'. Thing is, W'a' is about sente, it's disagreeable. For B23, I'm not sure about the direction. This or 'b'? 'b', I'd say, because W12 is high and that group may become a target. ]

;W[iq]C[This pincer isn't played much now (my teacher Fan Hui even says it's always bad). 'a' is very fashionable, and a high one at 'b' or 'c' would be in keeping with W18.]LB[hq:a][hp:b][ip:c]

;B[kp]C[This is very strange. It's W's zone around here, one more weak group is not welcome.]
(;W[eq]LB[io:a]C[Just jump to 'a', naturally. ]
(;B[fo](;W[fp]C[Too much contact play with weak stones you want to attack. This could hurt W24.
]
;B[gp]
;W[ep]C[I'm not sure what to do with B, however... It's tough having to care about B25.]
(;B[hp]C[Strange shape. Later, 'a' still connects W.]LB[gr:a]
;W[ip](;B[kn]
;W[in]C[B31 feels bad, now.]
;B[gn]
;W[ho]C[This kikashi may not be a good idea. If B tries and cut at 'a', he will weaken his position, and W still has 'b' to link up with either 'c' or 'd'. ]LB[io:a][ir:b][gr:c][lq:d]
;B[go]
;W[kq]C[Again a contact move to stones W wants to attack. Jumping to 'a' seems better.]LB[il:a]
;B[lq]	;W[kr]	;B[jo]	;W[io]
;B[lp]C[The B stones have gained a little shape, and strength... and weight, too.]
;W[or]
;B[rr]LB[rn:a]C[I'd still push at 'a' instead.]

;W[dm]C[The game is easy for W now, provided he uses the fight to help W16 too.]
;B[em]	;W[dl]	;B[do]	;W[eo]	;B[en]	;W[dn]	;B[im]	;W[jm]	;B[hm]	;W[jn]
;B[fr](;W[er]LB[hr:a][el:b]C[W58 only protects a few points, B cannot gain an eye in the corner. 'a' would be better, and if B connects, W'b' maybe.]
;B[cj]	;W[el]	;B[fm]	;W[fl]
;B[gl]C[The 62-63 exchange seems a loss for W.]
;W[hq]	;B[ik]
;W[gq]C[Now W regrets W58.]
;B[cf]	;W[gk]	;B[hk]
;W[ch]C[If W plays 68-69, 'a' is compulsory... Maybe play W70 without this exchange.]LB[gj:a]

;B[ce]C[67-71 is enormous yose, but yose only. B has an orphan group to take care of in the center South...  'a' perhaps, or maybe 'b', less direct and allowing for an exchange.]LB[ll:a][ok:b]
;W[jl]	;B[gj]	;W[fk]	;B[il]	;W[rn]	;B[rp]
;W[oh]C[Too late for B, W plays first in the biggest area.]
;B[pg]
;W[pi]C[W sticks to a B strength, and his large-scale surrounding of the South might be a little optimistic. Then again, it's difficult to find the correct balance to take a firm hold there. 'a' instead ?]LB[mk:a]
;B[nj]
;W[mm]C[This time, W grabs the group. Agreed, but tewari shows W80 is bad if 82 is necessary \: suppose W played 82 first, which seems about right, would he answer 81 at 80 ?]

;B[oc]LB[ob:a][pc:b]C[Again a contact play to attack ? 'a' or 'b' would help W less.]
;W[qc](;B[qd]	;W[ob]	;B[pb]	;W[pc]	;B[od]	;W[qb]	;B[nb]	;W[pa]
;B[mc]C[It's terrible to have W leave that easily - and sente !]

;W[rd]C[Hum, I said "sente"...\:)
]
;B[re]	;W[rc]	;B[oi]	;W[nk]	;B[mj]	;W[mk]
;B[df]LB[lj:a]C[The hane at 'a' is a great shape for W. B should not allow it. The game is over anyway, with W some 30 points ahead...]

;W[lj]C[Good !]
;B[li]	;W[ni]	;B[kj]	;W[lk]	;B[mi]	;W[oj]
;B[mg]C[Not much to say about the rest. Thanks for this occasion to see some Southern style !

]
;W[og]	;B[qf]	;W[fh]	;B[gg]	;W[gh]	;B[hg]	;W[hh]	;B[ih]	;W[fg]	;B[ff]
;W[ki]	;B[kh]	;W[ig]	;B[jg]	;W[gf]	;B[hf]	;W[ef]	;B[fe]	;W[ee]	;B[dd]
;W[eg]	;B[rj]	;W[qh]	;B[rh]	;W[qg]	;B[rg]	;W[qk]	;B[rm]	;W[so]	;B[rk]
;W[ql]	;B[sp]	;W[rl]	;B[bh]	;W[bi]	;B[bg]	;W[ci]	;B[mn]	;W[jp]	;B[nn]
;W[np]C[151\: B resigns
]
)
(;B[pb]	;W[qd]	;B[qe]	;W[re]
;B[rf]C[Isn't W dead this way ? It's a good exercise... In this variation, W could perhaps play 86 at 'a' and let go of the corner. He's got enough points anyway.
]LB[qf:a]
)
)
(;B[dr]C[What's the worst that can happen to W if B is allowed this jump ?]
;W[er]	;B[es]	;W[cq]	;B[cr]	;W[br]	;B[bp]	;W[bq]	;B[co]
;W[cp]C[No eye and not much aji in the corner for B.]
)
)
(;B[io]C[What does this reflex hane give ?]
;W[jo]	;B[jp]	;W[in]	;B[ho]
;W[ir]LB[gr:a][lq:b]C[W38 perhaps, to make miai of 'a' and 'b']
;B[gr]	;W[lq]	;B[lo]	;W[jn]	;B[jr]	;W[kr]	;B[lm]
;W[il]C[W46 at 'a' maybe. B is hard put to save everything, and even then, W will profit from the double attack.]LB[dn:a]
)
)
(;B[go]
;W[io]LB[gr:a]C[B is very weak on the right, rather heavy on the left. And W still has 'a' to connect if need be.]
)
(;B[ip]C[The shape move, perhaps...]
(;W[gq]	;B[hq]	;W[fr]	;B[gr](;W[fq]	;B[ir]	;W[go]	;B[hp]
;W[gn]C[B is settled everywhere, W's East stones have lost their meaning.]
;B[rn]	;W[qm]
;B[cj]C[I like B. B31 seems a possible choice. What do you think ?]
)
(;W[hr]	;B[fq]	;W[gs]	;B[gq]	;W[go]	;B[hp]	;W[er]	;B[gn]	;W[cm]	;B[rn]
;W[qm]
;B[ob]LB[cj:a]C[Why not ? W still has a big weakness at 'a'.
W42 would be better at 43.]
)
)
(;W[hq]	;B[gq]	;W[hp]	;B[ho]	;W[jp]	;B[io]	;W[jq]	;B[jo]	;W[kq]	;B[lp]
;W[lq]	;B[mp]	;W[or]	;B[rn]	;W[qm]
;B[em]C[Too good for B. W has lost.]
)
)
)
(;W[cn](;B[fr]
;W[io]C[Good for W, one can already see this a help for the forlorn W16. The W East side structure works well in such a fight.]
)
(;B[io]	;W[fr]	;B[gq]	;W[gr]	;B[hq]	;W[hr]	;B[ip]
;W[jq]C[Lots of territory for W, no base yet for the B group.]
;B[kn]
;W[pb]C[...perhaps. On second thoughts, there may be better ways for W, as his East stones don't function well if B has a thick position in the center. 28 at 29 ?]
)
)
(;W[io]	;B[do]	;W[fr]	;B[ep]	;W[dq]	;B[gq]	;W[co]	;B[dn]	;W[cn]	;B[dm]
;W[gr]C[I like that for W. This 28 really is an all-important move. This W38 might be a bad choice. Second thoughts \: 'a' or 'b' instead.]LB[im:a][kn:b]
)
)
(;B[fp]C[If B simply answers the usual way...]

;W[dn]C[28 is about forced]

;B[io]C[B's shape may not be terrific, but what a relief compared to a W stone at 29.]
)
)
(;W[io]	;B[fo]
;W[dn]C[W has a good time.]
)
)
(;W[jp]C[So natural it heals me just looking at it.]
)
)
(;B[op]C[Try all the continuations, W cannot save both 2 and 4, and not very well sacrifice either. It's terrible to lose an early stone.]
;W[qp]	;B[nq]	;W[or]	;B[nr]	;W[oo]	;B[np]	;W[rq]	;B[pr]	;W[qr]	;B[os]
;W[pn]C[Even playing this simply, B has the better plus sente. There are more severe choices for B, beginning with 7 at 'a', the shape (hane at the head of 2 stones).]LB[rp:a]
)
)
(;AE[pp]
;B[po]C[... the fact that a follow-up B shimari based on sansan (at 3 or 'a') is less efficient than...]LB[pn:a]

;AE[po][qq][qo][pq][qo][pq]AB[pq][qo]C[... a shimari based on komoku. Letting the opponent make sub-optimal shapes is good.]
)
(;B[qp]	;W[po](;B[or]	;W[mp](;B[dd]C[B can also tenuki e.g. at 7, without the 'a'-'b' exchange.]LB[rn:a][pl:b]
)
(;B[rn]
;W[pl]LB[np:a][pm:b]C[5 and 7 are more or less sente, for B'a' and 'b' respectively would be good follow-ups, hurting the W stones development.]

;B[oc]C[I tend to prefer B here. If one objects that B submitted twice to the 2nd line, he's got other choices (5 at 'a' etc.)]LB[pq:a]
)
)
(;B[pq]	;W[np]	;B[oq]	;W[mn]
;B[qe]C[B avoids playing too low. With about any way to occupy the remaining corners...]
;W[dp]
;B[dd]C[Imagine the tewari from there\: B9, W2, B11, W10, B1 (too early), W8 ??, then 3-4-5-6-7 is a natural continuation, though maybe B should play 7 at 'a'. It's better for B. In this order, B1 is too early, but what a good result for a sansan invasion of a hoshi. ]LB[nr:a]
)
)
)