(;FF[4]
CA[UTF-8]
GM[1]
DT[2021-09-12]
GN[Tournament Game: 2021 New Ranks!!! - 9x9 handicap tournament (71615) R:5 (teapoweredrobot vs nuno_pm_martins)]
PC[https://online-go.com/review/742389]
PB[nuno_pm_martins]
PW[teapoweredrobot]
BR[9k]
WR[5k]
TM[604800]OT[172800 fischer]
RE[W+12.5]
SZ[9]
KM[3.5]
RU[AGA]

;B[df]
;W[ge]
;B[gc]
;W[cd]
;B[cf]
;W[fg]
;B[ed]
;W[ec]
;B[fd]
;W[dd]
;B[de]TR[de]TR[cf]TR[df]C[Making an empty triangle (which is nearly always bad) and not keeping the black stones connected.]
;W[ee]
;B[fe]
;W[ef]
;B[ff]
;W[eg]
;B[gf]
;W[gg]C[by now the three black stones are looking very weak and need the urgent help the other back group is strong anyway so doesn't need another move to help it.]
;B[hf]
;W[ch]
;B[bg]
;W[be]
;B[bh]
;W[dg]
;B[cg]
;W[di]
;B[eh]
;W[fh]
;B[hh]
;W[hg]
;B[ig]
;W[gh]
;B[ih]
;W[bi]
;B[ei]
;W[gi]
;B[ah]
;W[bf]
;B[ai]C[I thought this is a mistake that just fills one of your own liberties. But AI says this is actually the best move so what do I know!]
;W[hi]C[I played this to have two ko threats at J4 and J1 - but neither is actually big enough really.]
;B[ci]
(;W[if]C[So I play this as a ko threat but AI says I should have just connected at d2. White has two liberties (which are actually three since J1 can't be filled without a move at J4 first) and Black can't fill the ko as it would leave only two liberties for the black group with white to play.]
(;B[ie]
;W[bi]
(;B[fc]C[This move doesn't threaten anything big enough and immediate enough]
(;W[ce]C[White cannot connect the ko either but can fill a liberty on the outside]
;B[ci]
;W[ii]C[small ko threat that should not be answered]
(;B[if]
;W[bi]
;B[eb]C[Again threatening the one stone and some corner is very small compared to the life of the whole of the bottom side.
But I don't think black actually had any threats big enough]
;W[ag]
;B[cb]
;W[bb]
;B[dc]
;W[cc]
;B[ca]
;W[ba]
;B[]
;W[]
)(;B[dh]C[Black lives]
;W[if]
;B[ig]C[white is dead]
))(;W[dh]
))(;B[dh]C[I wonder if this is the only ko threat black has?]
;W[fi]
(;B[eh]C[but either black needs to play again here]
;W[dh]
;B[ci]
;W[ei]
;B[if]
;W[bi]
)(;B[ci]
(;W[eh]
;B[dh]
)(;W[dh]C[or if black goes for the ko then white can just connect and clearly have three (really four) liberties to black's two]
))))(;B[dh]C[better to ignore the treat as now the black group lives and even with capturing the three stones on the right, white cannot live anyway.]
(;W[ii]
;B[ie]C[white only has one eye]
)(;W[ie]
;B[he]
;W[id]
;B[hd]
;W[ic]
;B[hc]
;W[ib]
;B[hb]
;W[ii]C[white cannot make another eye]
)))(;W[dh]C[The easy way to win the capturing race (which I didn't notice/couldn't read at the time)]
))