(;
AB[ab][bb][cc][dc][dd][eb][fb][gb][hc][hd][he][hf][dg][df][cf][nb][mc][md][oc][od][oe][ne][pd][qe][pf][qg][rg][rf][sf][rq][qr][qp][pp][po][pn][pm][ro][cs][dr][er][eq][eo][ep][en][em][hq][bq][cq][cp][co][cn][bn][cm]
AW[bc][be][bd][bf][cg][ch][dh][eh][eg][ef][ed][ec][gc][gd][ge][gf][hg][gh][rb][pb][ob][pc][qd][rd][re][nd][me][mf][nf][of][pg][rh][ph][qh][sh][sg][bm][bl][cl][dl][dm][dn][do][dp][dq][cr][br][ar][qo][qn][qm][ql][pl][sn][rp]
PL[W]
C[White to play the best endgame sequence in each quadrant.

Which quadrant is the best for White to play first?

Which quadrant is the worst for White to play first?

Source:
    Go World #18, p. 55
    Ogawa Tomoko 4P and James Davies]
(;
W[de]
C[White's best play here in the top left is gote.];
B[cd]
C[Later, Black has this forcing sequence.];
W[ce];B[fc];W[fd]
C[See the next variation for Black playing first.]
)
    (;
    B[ee]
    C[Black's best play here is also gote.];
    W[fe];B[de];B[fc]
    C[Later, Black has this sente follow-up.];
    W[fd]
    C[The difference between White and Black playing first in this quadrant is 8 points gote.

Verifying this point result is left as an exercise for the reader.]
    )
    (;
    W[ao]
    C[White's best play is this tesuji in the lower left.];
    B[aq]
    LB[an:A]
    C[Black must fall back here to defend.

If Black greedily blocks at A instead, White plays here, and Black loses the semeai.];
    W[an]
    C[And eventually, Black must fill in 2 points to capture the 3 corner stones.

See the next variation for Black playing first.]
    )
    (;
    B[an]
    C[Black's best play is to descend here.];
    B[am]
    C[Later, pushing here is Black's privilege, because White playing here is not sente.];
    W[al]
    C[The difference between White and Black playing first in this quadrant is again 8 points gote.]
    )
    (;
    W[sp]
    C[White's best play here in the lower right is gote.];
    B[sq];W[so]
    C[See the next variation for Black playing first.]
    )
    (;
    B[sp]
    C[Black's best move here is to capture.];
    B[rn]
    C[Later, pushing here is Black's privilege.];
    W[rm];B[so];W[sm]
    C[The difference between White and Black playing first in this quadrant is again 8 points gote.]
    )
    (;
    W[se]
    C[White will play here in the top right.];
    B[nc];W[qf];B[pe]
    C[See the next variation for Black playing first.]
    )
    (;
    B[nc]
    C[Black will play here.];
    W[se];B[pe];W[qf]
    C[Note that no matter which side plays first, Black loses the 4 stones of the side

Locally, the difference between White and Black playing first in this quadrant is 0 points!

So globally, White should play any one of the other quadrants before playing in this quadrant.]
    )
)

