The generator matrix

 1  0  1  1  1  0  1  1  0  1  1  1  1  1  1  0  1  0  1  1  0  1  X
 0  1  1  0  1  1  0 X+1  1  1  0  X X+1  0  X  1  0  1 X+1  X  1  X  0
 0  0  X  0  0  0  0  0  0  X  X  X  0  0  X  X  X  X  0  X  0  0  0
 0  0  0  X  0  0  0  X  0  X  X  0  0  X  0  X  X  0  X  X  0  X  X
 0  0  0  0  X  0  0  0  X  X  0  0  X  X  X  0  X  0  0  X  0  X  0
 0  0  0  0  0  X  0  X  X  X  0  0  0  0  0  0  X  X  0  X  X  X  X
 0  0  0  0  0  0  X  X  0  X  0  X  X  0  0  X  0  0  X  X  X  0  0

generates a code of length 23 over Z2[X]/(X^2) who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+54x^18+103x^20+104x^22+114x^24+80x^26+32x^28+16x^30+5x^32+2x^34+1x^36

The gray image is a linear code over GF(2) with n=46, k=9 and d=18.
This code was found by Heurico 1.16 in 0.308 seconds.