| 1664 | IMO Shortlist 1986 problem 1 | | 0 | | |
| 1665 | IMO Shortlist 1986 problem 2 | | 0 | | |
| 1666 | IMO Shortlist 1986 problem 3 | | 0 | | |
| 1667 | IMO Shortlist 1986 problem 4 | | 0 | | |
| 1668 | IMO Shortlist 1986 problem 5 | | 5 | | |
| 1669 | IMO Shortlist 1986 problem 6 | | 0 | | |
| 1670 | IMO Shortlist 1986 problem 7 | | 0 | | |
| 1671 | IMO Shortlist 1986 problem 8 | | 0 | | |
| 1672 | IMO Shortlist 1986 problem 9 | | 0 | | |
| 1673 | IMO Shortlist 1986 problem 10 | | 0 | | |
| 1674 | IMO Shortlist 1986 problem 11 | | 0 | | |
| 1675 | IMO Shortlist 1986 problem 12 | | 0 | | |
| 1676 | IMO Shortlist 1986 problem 13 | | 0 | | |
| 1677 | IMO Shortlist 1986 problem 14 | | 1 | | |
| 1678 | IMO Shortlist 1986 problem 15 | | 0 | | |
| 1679 | IMO Shortlist 1986 problem 16 | | 0 | | |
| 1680 | IMO Shortlist 1986 problem 17 | | 0 | | |
| 1681 | IMO Shortlist 1986 problem 18 | | 0 | | |
| 1682 | IMO Shortlist 1986 problem 19 | | 0 | | |
| 1683 | IMO Shortlist 1986 problem 20 | | 0 | | |
| 1684 | IMO Shortlist 1986 problem 21 | | 0 | | |