src/HOL/ex/Sudoku.thy
changeset 68224 1f7308050349
parent 63680 6e1e8b5abbfa
equal deleted inserted replaced
68223:88dd06301dd3 68224:1f7308050349
   134   nitpick [expect=genuine]
   134   nitpick [expect=genuine]
   135 oops
   135 oops
   136 
   136 
   137 text \<open>
   137 text \<open>
   138   Some ``exceptionally difficult'' Sudokus, taken from
   138   Some ``exceptionally difficult'' Sudokus, taken from
   139   \<^url>\<open>http://en.wikipedia.org/w/index.php?title=Algorithmics_of_sudoku&oldid=254685903\<close>
   139   \<^url>\<open>https://en.wikipedia.org/w/index.php?title=Algorithmics_of_sudoku&oldid=254685903\<close>
   140   (accessed December~2, 2008).
   140   (accessed December~2, 2008).
   141 \<close>
   141 \<close>
   142 
   142 
   143 text \<open>
   143 text \<open>
   144 \begin{verbatim}
   144 \begin{verbatim}