Place the digits 1 to 9 in every row, column, 3x3 standard block and 4 extra regions painted with grey. All digits on two main diagonals must also be different.
Solution code: Both diagonals, first the one from top left to the bottom right, then the one from top right to the bottom left.
on 15. August 2021, 23:33 by zhergan
Tags and labels revision..
on 6. January 2012, 13:24 by Oliver Strauß
Nice and tricky puzzle. Thank you zhergan.
on 20. September 2010, 16:48 by Statistica
Also, ich habe mich auch schwer getan :-(
on 19. September 2010, 13:04 by ibag
Ein bißchen mühsam, aber machbar.