(;GM[1]FF[4]SZ[19]HA[0]KM[0]GN[Cho L&D (abc)]AB[ca][bb][jb][bc][ec][ic][kc][cd][ed][hd][de][ee][fe][ge]AW[da][cb][eb][fb][hb][dc][gc][fd]C[Elementary]
(;B[ga];W[fa];B[ha];W[ia];B[ib];W[gb];B[ha];W[ba]
;B[cc]C[Correct.])
(;B[ba]WV[];W[ha]C[Wrong.])
(;B[cc]WV[];W[ga]C[Wrong.])
(;B[fc];W[hc]
(;B[ga];W[ha];B[fa];W[ba]
;B[cc]C[Correct.])
(;B[ha];W[ia];B[ga];W[ib]
;B[fa]C[Correct.]))
(;B[hc];W[fc]
(;B[ga];W[ha]
;B[fa]C[Correct.])
(;B[ha];W[ia];B[ga];W[ib]
(;B[fa]C[Correct.])
(;B[ja];W[gb]
;B[fa]C[Correct.])))
(;B[ha]WV[];W[ga]
(;B[ba];W[ia]
(;B[ib]
(;W[hc])
(;W[fc]))
(;B[hc];W[fc])
(;B[fc];W[hc]))
(;B[cc];W[ba];B[ib];W[hc]
(;B[ia];W[fc])
(;B[fc];W[ia]))
(;B[fc];W[ia])
(;B[hc];W[ia]
(;B[ib];W[fc])
(;B[fc];W[ib])))
(;B[fa]WV[];W[ga];B[ia];W[ha]
(;B[hc]
;W[fc]C[Wrong.])
(;B[fc]
;W[hc]C[Wrong.]))
(;B[ib]WV[];W[ha]C[Wrong.]))
