Reformatted justecorruptio / 2048.c https://gist.github.com/justecorruptio/9967738

Reformatted.c

M[16],X=16,W,k;

main() {
    T(system("stty cbreak"));
    puts(W&1 ? "WIN":"LOSE");
}
K[]={2,3,1};
s(f,d,i,j,l,P) {
    for(i=4; i--; )
        for(j=k=l=0; k<4; )
            j<4? 
                P = M[w(d,i,j++)],
                W |= P >> 11,
                l*P&&(
                    f? M[w(d,i,k)]=l<<(l==P) : 0,
                    k++
                ),
                l=l? 
                    P? 
                        l-P? P : 0
                    :
                        l
                :
                    P
            :
                (f? 
                    M[w(d,i,k)] = l 
                :
                    0, ++k, W |= 2*!l, l=0
                );
}

w(d,i,j) {
    return d? w(d-1,j,3-i) : 4*i+j;
}

T(i) {
    for(i=X+rand()%X; M[i%X]*i; i--);
    i? M[i%X]=2<<rand()%2 : 0;
    for(W=i=0;i<4;)
        s(0,i++);
    for(i=X,puts("\e[2J\e[H"); i--; i%4||puts(""))
        printf(M[i]? "%4d|" : "    |", M[i]);
    W-2||read(0,&k,3)|T(s (1,K[(k>>X)%4]));
}//[2048]