Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...Nc6/4. Nxc6/4...dxc6

Stafford gambit C42 Stafford gambit 4...dxc6 Black recaptures with the d-pawn. This opens the d-file for Black's queen and the diagonal for Black's light square bishop. The g4-square is now covered by Black's light square bishop. Black is prepared for a lighting-fast attack on White's position. They want to play ...Bc5 and pressure f2 with ...Ng4 or ...Nxe4, or by forming a battery with the bishop with ...Qd4. To prove White's advantage, they must keep their head and play solidly, stalling out Black's momentum. White's priorities are, in order: Find a way to protect their e-pawn to hold on to their material lead. Find a way to prevent the knight from coming to g4. Defend with a pawn The first option is 5. d3 to defend e4. Though this appears to limit's White's light-square bishop, White plans to follow 5...Bc5 with 6. Be2 and control g4 that way, then build a strong centre with c3 and d4. 5. f3 is an interesting try that derails the usual Stafford line. Ignoring common wisdom to "never play f3", White defends e4 and g4 at the same time. Now 5...Bc5 runs into 6. c3 and 7. d4, and Black has a hard time making progress. The best move is instead 5...Be6. Defend while developing a piece 5. Nc3 is the most natural move, to develop a piece while defending e4, and staying flexible regarding the light-square bishop. This is a sharper, counterattacking alternative that generates tactics for both sides: playable but double-edged. White may hope to play d4 in one move, but will find it hard to do so as they no longer have a knight on f3 to support it, and White's knight on c3 prevents the c3 and d4 plan to shutdown Black's bishop. It is important in the 5. Nc3 line that White then controls g4 with 6. h3, and not try the combination 5. Nc3 and 6. Be2?? together. This is because White's bishop prevents Qf3 (see explanation in sample game). 5. Qe2 can defend the e-pawn, and though it looks unnatural, it is playable so long as White avoids the trap of playing 5...Bc5 6. e5?? (6...Ng4 and a crushing attack on f2 follows, e.g. 7. f3? Bf2+ 8. Kd1 Ne3+ 9. Qxe3 Bxe3 ---). 6. h3 h5 7. d3 instead, and Black's initiative fizzles out. Move the pawn 5. e5!?, kicking the knight, is another interesting try for White. After 5...Ne4, White must play 6. d4 to disallow 6...Bc5. 6. d3??, to kick the knight again, allows 6...Bc5 as in the Lowens vs Stafford 1950 game, where Black threatens mate in 2 (...Bxf2+ Ke2 ...Bg4#); 7. dxe4 and Black wins White's queen, 7. Be3 and Black wins an exchange. Sample game 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 The position after 4...dxc6. White has accepted the Stafford gambit. 1 right Sergey Erenburg v Eric Rosen (2024) This miniature played at the FIDE World Blitz championship illustrates the sharpness of the gambit and the precariousness of inaccurate play by White.Erenburg v Rosen, 2024. Chessgames.com 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 White accepts the Stafford gambit and this position is reached. 5. Nc3 White chooses to defend the e4 pawn with their knight. 5. d3 is a sound alternative. 5...Bc5 Black develops their bishop and pressures f2. Black threatens ...Ng4, attacking f2 twice and threatening ...Bxf2+. If White does not react to this threat they lose their advantage and more, e.g. 6. d3? Ng4 7. Be3 Nxe3 8. fxe3 Bxe3 --. 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Bc5 6. Be2 Position after 6. Be2. White attempts defence with both Nc3 and Be2. This allows Black to win back the pawn, but Black chooses to push for a larger advantage. 1 right 6. Be2? Be2 protects the g4 square, but it is a mistake in the 5. Nc3 line. Black can win back the pawn with 6...Qd4!, forming a battery against f2 and forking the e4 pawn. 7. O-O Nxe4 8. Nxe4 Qxe4 . Be2 works in the 5. d3 line because the e4 pawn is guarded with a pawn. 5. d3 Bc5 6. Be2 Qd4? 7. O-O Nxe4?? 8. dxe4 Qxe4 9. Nc3 +++. Black is down an knight and a pawn for two pawns. 6...h5!? Black chooses not to play 6...Qd4 (despite what the commentators may have thought, Rosen was familiar with the idea but opted for this tricky line instead). Stafford Gambit Crushes Grandmaster at the World Championship - Eric Rosen (Youtube) 6...h5 supports the g4 square so that Black may play ...Ng4. Black's real intention is to use trading their knight on g4 to open the h file: ...Ng4 Bxg4 hxg4! 7. h3? White's move seems to add control over g4 and so prevent the knight from coming in. However, Black is interested in prying open the h file and this will help them to do so. An improvement would be 7. d3. Black can half-open the h file with 7...Ng4 8. Bxg4 hxg4 but this is not so dangerous if White avoids short-castling. 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Bc5 6. Be2 h5 7. h3 Qd4 Position after 7...Qd4. White must deal with the threat of Qxf2. 1 right 7...Qd4 Now Black threatens mate on f2, encouraging White to castle into the danger. 8. O-O Ng4 9. hxg4?? hxg4 An improvement would be 8. Rf1 to prevent mate. Black sacrifices the knight to pry open the h file. Even here White had a choice: 9. Bxg4 hxg4 and White needn't take back on g4. 10. d3 and if 10...gxh3 11. g3 h2+ 12. Kh1 and the king is quite safe. White is only slightly worse. 10. g3 N.B. 10. d3?? Qe5 (mate in 4) 11. g3?? Qxg3#. 10...Qe5 Threatens mate in 1 (f-pawn is pinned). 11. Kg2 Unpins f-pawn. 11...Bxf2 11...Qh5? fails to Rh1. Bxf2 deflects the rook from the back rank. 12. Rxf2 If 12. Kxf2 Rh2+ 13. Ke3 (Ke1?? Qxg3#) Qxg3+ 14. Bf3--- 12...Qh5 13. Bf3 13. Bf3 creates an escape route for the king via f1 and e2. 13...gxf3+ 14. Qxf3?? Qh1# 0-1 White blunders mate in one in time pressure. 14. Rxf3 Qh2+ 15. Kf1--- allows the game to go on. Theory table References Petrov Defence