(;FF[4]
CA[UTF-8]
GM[1]
DT[2021-04-21]
GN[chelseachels vs. 13ird]
PC[https://online-go.com/review/655855]
PB[chelseachels]
PW[13ird]
BR[31k]
WR[23k]
TM[300]OT[5x30 byo-yomi]
RE[W+T]
SZ[9]
KM[0.5]
RU[Japanese]
HA[2]
AB[gc][cg]

;W[cc]
;B[gg]
;W[ce]
;B[cd]
;W[dd]C[Good. Surround black while connecting around. Black is just giving you a free stone.]
;B[cf]
;W[bd]C[Reasonable, white is very strong there.]
(;B[de]C[Bad move. Black pastes his stone, which only has 2 liberties, directly against a now-ultra-strong white group.
See variations.

]
;W[ee]C[Good response.]
;B[df]TR[cf]TR[df]TR[cg]C[Black has been forced into an inefficient empty triangle.]
;W[ef]
(;B[fe]C[Again, black pastes a lone stone directly against a solid white group. See variation.]
;W[fd]TR[ed]SQ[gd]SQ[eg]C[Good. Protects this cutting point while leaving multiple options to split through black.]
;B[eg]
;W[ff]
;B[ge]
;W[gd]TR[gc]TR[ge]C[Good. Cut black.]
;B[hd]
(;W[ec]C[First bad move for white this game. Waste of a move. See variations.
]
;B[fg]
(;W[bg]C[Another bad move, it can be cut and killed easily. See variations.]
(;B[bh]C[See variation.]
;W[bf]
;B[ah]
;W[ch]
(;B[dh]C[See variation.]
;W[dg]C[Good capture.]
;B[ci]
;W[cg]
;B[di]
(;W[gb]C[See variations.]
;B[bi]
;W[hc]
;B[id]
;W[fc]
;B[ic]
(;W[ib]
;B[he]
;W[if]
;B[gf]
(;W[]C[See variation.]
;B[ag]
(;W[]
;B[af]C[Black pushes and white loses another point.]
;W[ae]TR[ae]TR[af]C[By passing, white didn't make these two points.]
;B[df]
;W[]C[But yes, now the game is over, passing is good.]
;B[cf]
;W[de]
;B[ha]
;W[]
;B[ia]
;W[ga]
;B[hb]
;W[ib]
;B[ac]
;W[]
)(;W[af]C[Still block here.]
))(;W[ag]TR[ae]TR[af]C[This is the last place to play, white should block the border here instead of passing. Compared to the game, white secures these points.]
))(;W[he]TR[fe]TR[ge]C[This cut still works. Last chance.]
;B[gf]
;W[ie]TR[ic]TR[hd]TR[id]
;B[ib]
;W[hb]
;B[ia]
;W[ha]
))(;W[he]C[Cut and kill!]
;B[gf]
;W[hc]TR[hd]
)(;W[gf]C[Push and break through!]
))(;B[dg]TR[gf]TR[ch]C[Of course black should play here.
Then this white stone is dead, it has only 2 liberties and nowhere to run, while black's surrounding groups all have more.

White should still just push through at G4.]
;W[gf]
;B[he]
;W[hf]C[Again, black is in huge trouble now.]
))(;B[bf]TR[bg]C[If black plays here, white's stone is easily cut off and will die. This is why B3 was bad.

]
(;W[af]C[For example, no way to connect back. This doesn't work.]
;B[ae]
;W[ag]
;B[bh]
)(;W[bh]C[Way too little space in the corner to survive either.]
;B[ch]
;W[bi]
;B[ag]
;W[ah]
;B[af]
;W[ci]
;B[di]
;W[dh]
;B[ai]
)))(;W[gf]C[Push and cut!]
(;B[hf]
;W[he]C[Good for white. black lost some stones.]
)(;B[he]
;W[hf]C[Good for white. White breaks through.]
))(;W[bf]TR[bd]TR[ce]TR[bf]C[If you must play on the left side, this is the correct move on the left. It is connected to the rest of white's stones (because black cannot play B5 without dying).
]
))(;W[]C[Even if white does nothing...]
(;B[ed]TR[ec]C[Black cannot cut. White just plays triangle and eats it.]
)(;B[ec]C[This doesn't work either.]
;W[ed]C[White just connects.

So clearly white did not need to spend a turn defending as in the game.]
))(;W[fg]C[Push and cut!]
;B[fh]
;W[eh]TR[eg]C[Atari.]
;B[dg]
;W[gh]TR[fh]C[Black collapses.]
(;B[fi]
;W[gi]
;B[ei]
;W[di]
)(;B[gf]
;W[fi]
))(;W[gf]C[Push and cut!]
(;B[hf]C[If black blocks...]
;W[he]C[Easy.]
)(;B[he]C[If black connects...]
;W[hf]TR[fe]TR[ge]TR[he]TR[ff]TR[gf]TR[hf]TR[gg]C[Black is severely cut apart. Very good for white.]
))(;W[he]TR[fe]TR[ge]C[Cut!]
;B[gf]
;W[hc]TR[hd]C[Triangled stone is toast, black has been torn apart. Easy capture 1-2-3.
]
))(;B[eg]TR[de]TR[cf]TR[df]TR[cg]TR[gg]C[Better - block off the bottom and conect.]
))(;B[fe]TR[gc]TR[fe]TR[gg]C[Better for black would be here - connect and build the right side.]
)(;B[ef]TR[cf]TR[cg]TR[gg]C[Or here - connect and build the bottom side.]
))