Final position — White is winning
English Opening: Opening Trap (Kaprinay–Hubner)
White wins in 9 moves with a decisive material gain. (Kaprinay - Hubner, 1926.??.??)
The moves
| 1. | c4 | e5 |
| 2. | Nc3 | Nf6 |
| 3. | g3 | Bc5 |
| 4. | Bg2 | d6 |
| 5. | e3 | Nc6 |
| 6. | Nge2 | Be6 |
| 7. | Nd5 | Nb4 |
| 8. | Nxb4 | Bxb4 |
| 9. | Qa4+ |
How the English Opening: Opening Trap (Kaprinay–Hubner) works
The English Opening: Opening Trap (Kaprinay–Hubner) is a classic chess opening trap arising from the English Opening. In this line White wins decisive material by move 9, punishing a natural-looking but losing idea from Black.
The full sequence runs 1.c4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 d6 5.e3 Nc6 6.Nge2 Be6 7.Nd5 Nb4 8.Nxb4 Bxb4 9.Qa4+. Each move looks reasonable, which is exactly why the trap is so effective over the board — Black walks into it while trying to play "normal" developing moves.
This pattern is well known from master and correspondence play (Kaprinay - Hubner, 1926.??.??). Recognising it early lets you either spring it as White or sidestep it as Black.
Practice this trap move-by-move
Open the English Opening: Opening Trap (Kaprinay–Hubner) in the Trapsterapp to play it out on a live board, drill it in practice mode, and learn how to avoid it when it's set for you — along with the full library of chess traps and gambits, fully offline.