Chess Opening Theory/1. e4/1...d5/2. Nf3/2...dxe4/3. Ng5

Tennison gambit accepted Scandinavian defence → Tennison gambit → Tennison gambit accepted Zukertort opening → Tennison gambit → Tennison gambit accepted 3. Ng5 From g5 White's knight attacks e4 and pressures f7, the most vulnerable square in Black's position. Defend e4 After 3...Nf6!?, defending e4, White can first turn their pressure on f7 into a development lead before recovering the pawn, or hope to entrap Black with it. 4. Bc4 (threatens 5. Bxf7+ Kd7) e6only 5. Nc3 Nc6 6. Ngxe4. 4. d3?! sets the groundwork for the Intercontinental Ballistic Missile variation.https://www.youtube.com/watch?v=E2xNlzsnPCQ 4...exd3 5. Bxd3 and the common move 5...h6?? is a blunder: 6. Nxf7 Kxf7 7. Bg6+ Kxg6 8. Qxd8 wins the queen for two minor pieces. It is dangerous for Black to hold onto the extra pawn too tightly. 4. Nc3 Bf5 5. Qe2? and Black should give back the pawn, happy knowing that White's queen is misplaced and exploitable. Otherwise, 5...Qd4?? walks into Brigg's trap: 6. Qb5+! Bd7 7. Qxb7 (threatens Qxa8) Bc6?! (defends the rook through the queen) 8. Bb5! (pins the bishop). At best Black is losing the rook, at worst: 8...Qb6??At time of writing, 8...Qb6 is the most common move in the Lichess database. 9. Qc8#. 8...Qd7 9. Bxc6 Qxc6??At time of writing, 9...Qxc6 is the most common move in the Lichess database. 10. Qc8# Return the pawn Black can sidestep the tricky lines by returning the pawn, 3...e5 4. Nxe4 f5 and 5. Ng3 is usual, though the surprising 5. d4!, sacrificing the knight, is superior by engine. 5. d4! fxe4 6. Qh5+! where: 6...g6?? allows 7. Qxe5+ Qe7 8. Qxh8 and White is up the exchange. 6...Ke7?? allows 7. Bg5+ skewering the queen. 7...Nf6 8. dxe5 (attacking the pinned knight) wins back the material. 8...Qd4!? is an interesting try, defending f6 through the pawn, but 9. exf6+ gxf6 and the critical move is 10. Nc3!, giving up the bishop sacrifice but preparing Rd1. 10...fxg5 11. Qxg5+ Ke8 12. Rd1 and the threat is Qd8#. Therefore 6...Kd7only 7. Qf5+ and Black's best line is to repeat moves and draw, otherwise 7...Kc6 8. Qxe4+ Kd7 9. dxe5 Ke8+. Theory table 0 Tennison gambit accepted 3...Nf6!? 4. Bc4 e6 5. Nc3 Be7 6. Ngxe4 Nxe4 7. Nxe4 - 3. ... ... 4. Nc3 Bf5 5. Qe2 Qd4?? 6. Qb5+ Bd7 7. Qxb7 Bc6?! 8. Bb5 Qb6?? 9. Qc8# Brigg's trap 1-0 3. ... ... 4. ... ... 5. ... ... 6. ... ... 7. ... ... 8. ... Qd7 9. Bxc6 Qxc6?? 10. Qc8# 1-0 3. ... ... 4. d3?! exd3 5. Bxd3 h6?? 6. Nxf7 Kxf7 7. Bg6+ Kxg6 8. Qxd8 +++ Intercontinental Ballistic Missile gambit 3...e5 4. Nxe4 f5 5. Ng3 Be6 6. Bb5+ c6 7. Ba4 Nf6 8. O-O Qa5 9. Nc3 -- (pawn return line) 3. ... ... 4. ... ... 5. d4! fxe4?! 6. Qh5+ Kd7□ 7. Qf5+ Ke8 8. Qh5+ Kd7 9. Qf5+ Ke8 10. Qh5+ ½-½ 3. ... ... 4. ... ... 5. ... ... 6. ... g6?? 7. Qxe5+ Qe7 8. Qxh8 +++ 3. ... ... 4. ... ... 5. ... ... 6. ... Ke7?? 7. Bg5+ Nf6 8. dxe5 Qd4!? 9. exf6+ gxf6 10. Nc3! fxg5 11. Qxg5+ Ke8? 12. Rd1 +++ References See also