Math Is Fun Forum

hi... im new to the forums... a friend of mine made this code... can anyone help me crack it?

The code:

86 92 17 13 12 11 19 18 76 82 19 01
44 66 16 14 13 12 27 12 91 71 04 12
92 47 14 65 35 41 97 22 13 04 42 13
81 88 91 87 44 92 61 45 00 95 29 92
94 91 89 29 72 61 25 04 42 62 24 87
62 54 44 43 61 48 04 91 63 17 16 63
87 86 63 62 12 49 27 61 33 42 44 21
93 14 72 71 16 21 22 34 10 14 98 67
34 23 34 16 89 09 97 55 45 82 64 76
45 64 01 12 42 91 23 33 26 87 94 22
90 04 33 23 44 24 21 44 65 28 46 13
00 12 23 55 64 22 12 99 34 12 44 12

Clues:
The numbers (obviously) stand for alphabets
This is a 4 letter word
Use the "bishop" to "check" the clue
Think of it as a chessboard