2005/10/01 tough puzzle from sudoku.com.au

Initial position :

1) Easy eliminations :

c7=9%row, a7=5%row, h7=2%row, c8=2%row, b8=4%row, e8=1%row, h2=1%row, b5=9%col, g4=2%col, a1=2%col, c9=7%cell, e3=6%cell, e7=7%cell, f9=8%block, d9=4%row, d3=2%cell, f5=2%row, i5=5%row, g9=5%row, i9=9%row, h9=6%row, d5=6%row, f7=6%row, d7=3%row, a5=1%row, h5=8%row, b9=1%row, a9=3%row, f3=4%cell, a2=4%cell, c4=4%row, c1=8%block
lead to (for better reading, only remaining possibilities in still empty cells are written) :

2) 38 in Cg are in g38 so b2=3%row and b3=7%cell .. We're now at :

3) Look at 6 in Bb2 : whether it's in c2, in which e2=5%row, or it's in b1, in which b4=5%col : e4=8%cell. From here it's straight to end.

(Details if needed : a6=8%row, d6=7%row, e6=9%row, g2=9%row, d1=9%row, a4=7%row, c2=6%row, e2=5%row, b1=5%row, f4=5%row, c6=5%row, i4=3%row, b4=6%row, f6=3%row, g3=3%row, i3=8%row, g8=8%row, h8=3%row, i8=7%row, h1=7%row, g1=4%row, i1=6%row, g6=6%row, h6=4%row, i6=1%row, d4=1%row, f1=1%row )

See equivalent puzzles : 11-sept, 14-sept, 15-sept, 18-sept, 19-sept, 23-sept, 30-sept.