signed __int64 __fastcall sub_4540(__int64 a1, __int64 a2)
{
  char *v2; // rbp@2
  int v3; // er13@2
  signed __int64 result; // rax@2

  sub_51F0();
  if ( a1 == a2 )
  {
    dword_D110 = 0;
    sub_38A0("Your Move. Click or drag a piece");
    result = 0LL;
  }
  else
  {
    v2 = (char *)malloc(0x108uLL);
    v3 = sub_5340(a1, v2 + 8);
    *(_DWORD *)v2 = sub_5380(a1);
    *((_DWORD *)v2 + 1) = sub_5380(a2);
    sub_5200(a2, (unsigned int)v3);
    sub_5200(a1, 0xFFFFFFFFLL);
    dword_D110 = 3;
    sub_4230(a1, 0xFFFFFFFFLL);
    g_timeout_add(250LL, sub_4310, v2);
    result = 1LL;
  }
  return result;
}