Click any move to jump to that position; switch branches at any point with the alternative moves. Test your knowledge plays the shown position against the engine.
| Name | ECO | Main line length |
|---|
| Philidor Defense | C41 | 4 plies |
| Philidor Defense | C41 | 5 plies |
| Philidor Defense | C41 | 5 plies |
| Philidor Defense: Philidor Countergambit | C41 | 6 plies |
| Philidor Defense: Hanham Variation | C41 | 6 plies |
| Philidor Defense: Philidor Gambit | C41 | 6 plies |
| Philidor Defense: Lopez Countergambit | C41 | 6 plies |
| Philidor Defense: Nimzowitsch Variation | C41 | 6 plies |
| Philidor Defense | C41 | 6 plies |
| Philidor Defense: Exchange Variation | C41 | 6 plies |
| Philidor Defense: Philidor Countergambit, Zukertort Variation | C41 | 7 plies |
| Philidor Defense: Steinitz Variation | C41 | 7 plies |
| Philidor Defense: Nimzowitsch Variation, Klein Variation | C41 | 7 plies |
| Philidor Defense: Bird Gambit | C41 | 7 plies |
| Philidor Defense: Nimzowitsch, Locock Variation | C41 | 7 plies |
| Philidor Defense: Nimzowitsch Variation | C41 | 7 plies |
| Philidor Defense: Morphy Gambit | C41 | 7 plies |
| Philidor Defense: Exchange Variation | C41 | 7 plies |
| Philidor Defense: Hanham Variation, Sharp Variation | C41 | 8 plies |
| Philidor Defense: Larsen Variation | C41 | 8 plies |
| Philidor Defense: Lion Variation | C41 | 8 plies |
| Philidor Defense: Albin-Blackburne Gambit | C41 | 8 plies |
| Philidor Defense: Boden Variation | C41 | 8 plies |
| Philidor Defense: Exchange Variation | C41 | 8 plies |
| Philidor Defense: Hanham Variation, Delmar Variation | C41 | 9 plies |
| Philidor Defense: Hanham, Kmoch Variation | C41 | 9 plies |
| Philidor Defense: Hanham Variation, Schlechter Variation | C41 | 9 plies |
| Philidor Defense: Hanham Variation, Krause Variation | C41 | 9 plies |
| Philidor Defense: Lion Variation, Shirov Gambit | C41 | 9 plies |
| Philidor Defense: Nimzowitsch Variation, Rellstab Variation | C41 | 9 plies |
| Philidor Defense: Paulsen Attack | C41 | 9 plies |
| Philidor Defense: Nimzowitsch Variation, Sokolsky Variation | C41 | 9 plies |
| Philidor Defense: Philidor Countergambit, del Rio Attack | C41 | 11 plies |
| Philidor Defense: Hanham Variation, Steiner Variation | C41 | 11 plies |
| Philidor Defense: Lopez Countergambit, Jaenisch Variation | C41 | 11 plies |
| Philidor Defense: Lion Variation, Bishop Sacrifice | C41 | 11 plies |
| Philidor Defense: Lion Variation, Lion's Claw, with Be2 and c6 | C41 | 12 plies |
| Philidor Defense: Lion Variation, Lion's Claw, with Bc4 and h6 | C41 | 12 plies |
| Philidor Defense: Philidor Countergambit, Berger Variation | C41 | 13 plies |
| Philidor Defense: Nimzowitsch, Larobok Variation | C41 | 13 plies |
| Philidor Defense: Lion Variation, Delayed Bishop Sacrifice | C41 | 13 plies |
| Philidor Defense: Lion Variation, Forcing Line | C41 | 15 plies |
| Philidor Defense: Lion Variation, Sozin Variation | C41 | 16 plies |
| Philidor Defense: Berger Variation | C41 | 19 plies |