The Evans Gambit is a chess opening that begins with the moves:
1. e4 e5
2. Nf3 Nc6
3. Bc4 Bc5
4. b4
The Evans Gambit is an attacking line of the Giuoco Piano. White offers a pawn to divert the bishop on c5. If Black accepts, White can follow up with c3 and d4, ripping open the centre, while also opening diagonals to play Ba3 or Qb3 at some point, preventing Black from castling kingside and threatening the pawn on f7, respectively. If Black declines, the pawn on b4 stakes out space on the queenside, and White can follow up with a4 later in the game, potentially gaining a tempo by threatening to trap Black's dark-squared Bishop.
According to Reuben Fine, the Evans Gambit poses a challenge for Black since the usual methods of handling aggressive gambits from White are more difficult to achieve than with other gambits. Fine was once beaten by this gambit in a friendly game against Bobby Fischer, in just 17 moves. The gambit was very popular during the era of Romantic chess in the 19th century.
Convert all the letters in the opening into numbers A=1, B=2... Y=25, Z=26 etc..
EVANSGAMBIT = ABCDEFGHIJK
The cache can be found at:-
N55 (C-G)(F-G). (B-K)(H-A)F
W001 (B-E)G. CF(J-F)