(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[백 Cho Hye Yeon 9p]PB[흑 my friends 2dan]
(;AW[cm][bo][co][bp][ep][fp][gp][hp][bq][dq][hq][br][dr][cs]AB[dn][fn][hn][do][io][cp][dp][ip][cq][eq][fq][iq][kq][cr]C[Today's topic is:]
;B[fs]C[This one! One space jump! 
]
(;W[hr]C[When white plays here, it is easy for black.]
;B[ds]
;W[es]
;B[er]C[White is destroyed.
])
(;W[ds]C[Also does not work.]
;B[hr]
;W[gr]
;B[fr]C[White is dead!
]
;W[ir]
;B[hs]
;W[jr]
;B[kr]
;W[gq]
;B[gs]
;W[er]
;B[js]LB[es:A]C[White can not approach at A: self atari.])
(;W[gq]C[White has to play here. If white plays here, what can black do?
]
(;B[fr]
;W[gr]C[Black is dead by the self-dansoo.
]
;B[ds]
;W[es]
;B[er]C[self-dansoo (self-atari)]
;W[gs])
(;B[es]
;W[ds]
(;B[hs]
;W[fr]C[Black made a blunder.
])
(;B[er]
;W[bs]
;B[hs]
;W[gr]
;B[gs]
;W[ir]C[Black is dead!
]
;B[jr]
;W[is]))
(;B[er]C[This move is the only move to survive.
]
;W[ds]
(;B[es]C[However, this is not good. Black takes away his own liberties.
])
(;B[is]C[This move is the second one-space jump!
]
;W[bs]C[If white connects here...
]
(;B[hs]C[This is a hallucination.
]
;W[es]
;B[fr]
;W[gs]C[Throw in tesuji.]
;B[gr]
;W[hr]C[White smiles!
])
(;B[gs]C[The vital point!
])))))
(;AW[kn][lo][fp][gp][hp][kp][cq][dq][eq][iq][kr]AB[dn][fn][hn][bo][io][cp][ip][bq][gq][hq][br]C[Black to play.]
(;B[fr]C[This is not good.
]
;W[er]
;B[ir]
;W[jq]C[Black cannot win the race to capture.
])
(;B[gs]C[This is the one we choose!
]
(;W[fr]
;B[jq]
;W[ir]
;B[jr]
;W[js]
;B[is]
;W[hs]
;B[hr]C[Black is happy!
])
(;W[ir]
;B[es]C[The second one-space jump!
])
(;W[fq]C[If white plays here...
]
;B[es]C[The second one-space jump!
])))
(;AW[ip][jp][cq][dq][eq][fq][jq][cr][cs]AB[co][eo][fo][bp][gp][gq][iq][dr][ds]C[Black to play.]
(;B[bq]C[If black plays here...
]
;W[gr]
;B[hr]
;W[gs]C[This move is good.]
;B[er]
;W[es]C[White is alive!
]
;B[fs]
;W[fr]C[Black can not connect.])
(;B[gs]C[One-space jump!
]
(;W[fr]
;B[bq]
;W[gr]
;B[hr]C[White is dead!
])
(;W[bq]
;B[es]C[White is ruined!

Another nice one for the good empty triangle jar, in which we collect empty triangles that are amazing.])))
(;AW[do][dp][ep][fp][bq][cq][eq][gq][hq][iq][cr]AB[nc][pd][cn][co][cp][gp][hp][dq][fq][dr][er][fr]SQ[do][dp][ep][fp][eq]C[Black can capture the marked stones. Do you know how?]
(;B[fo]
(;W[dn]C[I would play here. But this is wrong!]
;B[dm]
;W[en]
;B[fl]
(;W[go]C[White cuts, and then...
]
(;B[fn]
;W[ho]
;B[ip]
;W[jp]
;B[io]
;W[in]
;B[jo]
;W[ko]C[The ladder is favorable to white.
])
(;B[ho]
;W[gn]
(;B[gm]
;W[hn]C[Black is ruined.
])
(;B[fn]C[This is a wonderful move.
]
;W[fm]
;B[gm]
;W[eo]
;B[hn]C[Wow...
]
;W[gl]
;B[hm]
;W[el]
;B[em]
;W[fk]
;B[fn]C[Well...
])))
(;W[fm]
;B[gm]
;W[gn]
;B[fn]C[White's effort is not working.
]))
(;W[en]C[What about this move? This is correct.
]
(;B[fm]
;W[em]
;B[el]
;W[dm]C[White can be alive.
])
(;B[dn]
;W[eo]
;B[em]
;W[fn]
;B[gm]
;W[ho]C[White can escape!
])))
(;B[fn]C[If black plays here...
]
;W[go]
(;B[fo]
;W[ho]C[The ladder is favorable to white.
])
(;B[ho]
;W[en]
;B[em]
;W[gn]C[White can escape to the outside!
]
;B[gm]
;W[hn]
;B[io]
;W[in]
;B[jo]
;W[fo]))
(;B[en]
;W[fo]
;B[gn]
;W[go]
;B[ho]
;W[hn]C[Black fails.])
(;B[gn]C[One-space jump! A wonderful move.
]
(;W[gr]C[Too easy for black.]
;B[dn]C[Black has 3 liberties, white has 2. Black wins a race to caputure by one move.
])
(;W[fm]C[Creative, but wrong.]
;B[en]C[The vital shape point. White is dead!
])
(;W[fn]
;B[fm]
;W[em]C[This looks promising for white, doesn't it?]
;B[en]
;W[dn]
;B[dm]
;W[eo]
;B[el]C[It seems to be a ko-fight, but...
]
(;W[go]
;B[ho]
;W[gm]
;B[fo]C[A double ko - white is dead.
]
(;W[fl]
;B[en])
(;W[od]
;B[oc]
;W[go]
;B[en]
;W[hn]
;B[fo]))
(;W[dl]
;B[cm]
;W[fl]
;B[go]
;W[gm]
;B[fo]C[White is dead!
]))
(;W[em]
;B[en]C[A vital point again. White is cut.
]
;W[dn]
;B[dm]
;W[fn]
;B[fo]
;W[eo]
;B[en])
(;W[en]
;B[em]C[Vital point number 3.]
;W[fm]
;B[fn]
;W[dm]
;B[dn]
;W[el]
;B[fo]C[White is dead!
The one-space jump tesuji was shining.
])))
(;AW[bd][bf][cf][cg][dh][di][dj][ej][ek][dl][dm][dn][co][cp][cq][cr][dr]AB[dg][eg][eh][ei][fj][ck][dk][fk][el][em][en][do][fo][dp][dq][fq][er]C[Black to play. Looks like black's two stones are horribly outnumbered. But he has a tesuji!]
(;B[ak]C[One-space jump tesuji!
]
(;W[bl]C[Not good for white.]
;B[ch]
;W[ci]
;B[bh]
;W[bi]
;B[ai]C[White is dead
])
(;W[cj]C[This move is good.
]
;B[bj]
;W[cl]
;B[bk]
;W[ch]
;B[bl]
;W[cn]C[Black is dead!
]))
(;B[ch]C[But black has a solution. Black should cut here!
]
;W[ci]
;B[cn]
;W[cm]
;B[ak]C[This is a right sequence.
]
(;W[bl]
;B[bk]
;W[bi]
;B[bn]
;W[bm]
;B[am]C[Black succeeds!
]
;W[bo]
;B[an]
;W[al]C[White can not play here, it is self atari again.]
;B[cl])
(;W[cl]
;B[bk]
;W[bi]
;B[bn]C[White can not escape.
])))
(;AW[pd][ce][cf][dg][eg][fh][ei][pj][ek][fl][dm][em][cn][co][pp]AB[cd][dd][fd][df][ef][fg][gg][cj][fm][gm][dn][en][cp][dp][fp]C[The left side is a problem.]
;B[aj]C[One-space jump tesuji!
]
(;W[bk]
;B[cg]
(;W[ch]
;B[bg]
;W[bh]
;B[ah]
;W[bf]
;B[ag]C[Well...
]
;W[af]
;B[ai]
;W[bj]
;B[dh]
;W[eh]
;B[bi]
;W[di]
;B[ci]
;W[ck]
;B[de]C[Black succeeds!
])
(;W[bg]
;B[ch]
;W[bh]
;B[bi]
;W[di]
;B[ci]
;W[ck]
;B[ah]
;W[bf]
;B[de]
;W[bd]
;B[bc]
;W[ae]
;B[ag]C[Black succeeds!
]
;W[dj]
;B[ai]
;W[af]
;B[ac]
;W[bj]
;B[ad]C[Black wins by one liberty.]))
(;W[ch]
;B[cm]C[This is symmetrical! 
])))
