For each of four 9x9 grids; place the digits 1 to 9 in every row, column and 3x3 standard block and the 4 extra areas (which are painted with blue and yellow).
Solution code: Row 14, followed by column 8.
on 16. August 2021, 00:39 by zhergan
Tags revision..
on 8. December 2016, 09:42 by lubosh
Very nice and tough one !
on 27. July 2014, 09:19 by Hasenvogel
hab nur einmal T&E gebraucht
on 18. July 2012, 15:37 by uko50
sehr anspruchsvolles logisch loesbares Raetsel, was einen bis zum Schluss in Atem haelt.