(;
AB[ma][mb][mc][md][me][na][pa][ra][fb][gb][hb][qb][qc][bc][bd][be][dc][dd][ec][hc][hd][he][hf][nc][ad][ae][af][cd][jd][je][jf][kd][ld][fe][ff][fg][fh][fi][fj][ie][oe][of][pe][pf][re][rf][ef][gf][gg][gh][kf][nf][ng][nh][ni][nj][qf][qg][qh][sf][sg][sh][si][pg][ph][pi][ah][ai][aj][ak][al][am][ch][ci][kh][ki][lh][bi][bj][ji][jj][mi][ej][gj][ij][lj][kk][kl][km][ok][ol][sk][bl][bm][bn][el][em][fl][fm][jl][nl][nm][nn][pl][cm][dm][gm][gn][dn][do][dp][jn][jo][pn][po][qn][co][io][ko][lo][oo][op][oq][ep][eq][er][es][gp][gq][gr][gs][mp][mq][mr][ms][np][cq][fq][fr][iq][ir][hr][jr][nr][ls][os]
AW[oa][ob][oc][od][sa][nb][pb][rb][rc][rd][fc][fd][gc][gd][ic][jc][kc][lc][sc][sd][se][ed][ee][nd][ne][pd][qd][ce][de][ge][ke][le][qe][bf][bg][bh][df][if][ig][ih][ii][lf][lg][mf][mg][ag][cg][eg][eh][ei][hg][hh][hi][hj][hk][jg][jh][kg][og][oh][oi][oj][rg][rh][ri][rj][dh][di][dj][dk][dl][mh][gi][qi][qj][cj][ck][cl][pj][pk][sj][bk][ek][fk][gk][ik][il][im][in][jk][gl][ql][qm][rl][hm][hn][ho][hp][hq][jm][om][on][pm][an][ao][en][eo][fn][fo][ln][rn][ro][rp][bo][bp][go][qo][so][sp][sq][cp][fp][ip][jp][kp][lp][pp][pq][pr][ps][dq][dr][ds][jq][kq][lq][br][cr][kr][ks][lr][or][qr][hs][is][js][rs][ss]
TR[sa]
LB[ns:A]
C[White has 2 more captures than Black.  And White has just recaptured (marked) the double ko in the top right corner.  So Black plays next.

Note that White is alive in double ko in the top right.

If you do a quick count, you'll see that, even with komi, Black is ahead by maybe 5 points.  But both players have been in byoyomi for quite a while, and the endgame has been non-trivial.  So to be safe, Black is trying to squeeze every last point out of the endgame.

At this point, Black thinks that maybe he has a choice:  simply connecting at A (bottom edge), or  passing and then winning the ko to make an extra point at A.

Using the AGA rules, what should Black do?];
B[ns]
C[Black may as well simply connect the ko.

Under AGA rules, Black and White must make the same number of plays.  So Black doesn't lose the point here, because White must now make a play.];
W[qa]
C[So without any dame points remaining, White may as well just capture the double ko at the top, which is point-wise the same as handing Black a pass stone.

Now both players will pass to end the game.  (Black wins relatively comfortably.)]
)

