The February 2012 problems are all on the theme of codes and codebreaking, in celebration of Alan Turing's centenary.
Instead of featuring a game this month, we have invited James Grime of the Enigma Project to create a code challenge.
You can watch the video here or visit James's YouTube channel and watch it there.
Here is the cipher text:
VA BT LS EG OT XK PB BH CI FV GA YC QG BP UW IH QD OE DI HL CQ YC QG BP EI LZ GA GB IZ PS AZ DQ NI CY UY EA AI UA BF BV OV QA ZS DP QD PG QM PS WL QY DH BD TL VZ PL LW AH GZ BP IM NI KP DZ QU DH FP CI FV RT SB BP BV XO BE BQ PG KO GE IK KO NA OS DG DG DA OX PO GE LZ GA OP FL WU PU UT WF BV IC HF EQ SP NA UX DC BV
Here is the crib:
"EXTRA LARGE FRENCH FRIES"
James has now produced a video solution to his code challenge.
You can read a detailed explanation on James's website here.