An easy endgame, containing two elementary tesujis useful to know.
(japanese rules)
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[7]KM[0.00]
PW[Weiß]PB[Schwarz]AW[cc][bd][cd][dd][ae][ee][bf][ef][ff]AB[bb][cb][db][ac][bc][ad][ed][fd][fe][gf]C[No komi, no prisoners - White to play and draw!]PL[W]
(;W[ec]CR[ec]
(;B[fc]CR[fc]
(;W[dc]CR[dc]
;B[eb]CR[eb]
(;W[ge]CR[ge]
;B[gd]CR[gd]
;W[fg]CR[fg]
;B[fb]CR[fb]C[Jigo! RIGHT])
(;W[fg]CR[fg]
;B[ge]CR[ge]C[This is a one point loss for white....]))
(;W[eb]CR[eb]
;B[dc]CR[dc]
;W[fb]CR[fb]
;B[gb]CR[gb]C[W E6 doesn't work!]))
(;B[dc]CR[dc]
;W[fc]CR[fc]C[Of course,Black can't play this way.]))
(;W[dc]CR[dc]
;B[ec]CR[ec]
;W[fg]CR[fg]C[This is hopeless: Black wins by three points.])
(;W[fg]CR[fg]
;B[dc]CR[dc]C[This is worst: Black wins by four points!])
(;W[ge]CR[ge]
;B[dc]CR[dc]
;W[gg]CR[gg]
;B[gd]CR[gd]
;W[gf]CR[gf]C[Not bad, but Black still wins by one point.]))
