- I would prefer the kings gambit, cuz there are some dirty tricks aganst the queens gambit like the albin countergambit, but if you know how to handle the countergambit then its completly fine to play the queens gambit
with opening is better? king's gambit or queen's gambit


Even if it [the QD] gets declined you must know the Slav and both the QGD well to equalize.
@Game of pawns sorry I don't understand your question. If you reach the Queen's gambit position say D4 D5 C4 then the slav and the QGD are the two main responses. What else will black play?
If Black plays the Slav, he doesn't need to know the GQD. If Black plays the QGD, he doesn't need to know the Slav. Why would you think that Black needs to know both of those openings to equalize?
Your most recent post doesn't even reply to anything that you or I previously said.