(;
AB[na][nb][nc][nd][ne][eb][ec][ob][pb][rb][bc][bd][fc][fd][fe][ff][qc][qd][cd][dd][rd][sd][cl][bm][dm][cn][co][mo][mp][mq][mr][ms][no][dp][dq][dr][rp][sp][qq][qr][qs][br][fr][sr][ns][ps]
AW[ma][mb][mc][md][me][mf][ab][bb][fb][gb][cc][dc][gc][gd][ge][gf][oc][pd][qe][re][se][nf][of][pf][bn][bo][bp][oo][op][qo][ro][so][cp][cq][cr][cs][np][nq][nr][qp][pq][pr][bs][ds][os]
C[Which corner has the biggest endgame play?
A, B, C, D?

Source:
    "Odd Man Out" (endgame tutorial)
    Ogawa Tomoko 4p
    Go World #20, P. 56]
LB[fa:A][od:B][or:C][an:D]
(;
B[fa];W[ga];B[ea]
)
    (;
    W[ea];B[da];W[fa]
    C[Note that Black can now tenuki, so the difference between Black and White playing first evaluates to 2 points in gote.]
    )
    (;
    B[od];W[pe];B[pc]
    )
    (;
    W[pe]
    C[So again, the difference evaluates to 2 points in gote.]
    )
    (;
    B[or]
    )
    (;
    W[or]
    C[The difference here is one prisoner for Black vs. one point of territory for White.  So the endgame size is 2 points in gote.]
    )
    (;
    B[an]
    C[Unfortunately for White, this hane is sente.]
    (;
    W[ao]
    C[White cannot block here.];
    B[aq];W[ar]
    C[White has to start a ko to live, which is terrible for White.]
    )
        (;
        W[ar]
        C[Because of the previous variation, White must fall back here to defend.  Black reduces the corner in sente.]
        )
    )
    (;
    W[an]
    PL[W]
    C[And White going first only ends in gote.

So this lower left corner is the biggest endgame play.

By precise counting, the difference gives an endgame value of 3 points in sente.];
    W[am];B[al]
    )
)

