The Bryntse Gambit, a subvariation of the Grand Prix Sicilian where White sacrifices his queen on move six (1. e4 c5 2. f4 d5 3. Nf3!? de 4. Ng5 Nf6 5. Bc4 Bg4?! 6. Qxg4!) is another Krol favorite. This gambit was invented by a Swedish correspondence player named Arne Bryntse who won the Swedish correspondence championship in 1972. He even used the “if move” option to suggest the move 5. … Bg4 to his opponents! He would write, “If 5. … Bg4 6. Qxg4.” Krol has scored +6 -1 =3 with it.
Here’s one of his best games using the Bryntse Gambit. I give the game with only light notes by Stockfish 5. It was interesting going through this game with SF because it shows the difficulty of engine analysis that good CC players have to deal with. In many positions SF kept bouncing back and forth between what it considered the best move and the evaluation sometimes changed drastically the deeper it got into the position.