A method for pressurizing a hydraulic accumulator includes creating an annulus pressure zone in hydraulic communication with the hydraulic accumulator through a hydraulic recharging circuit and applying a hydraulic pressure to the annulus pressure zone. The optical storage medium includes a plurality of first headers respectively having first track addresses as consecutive numbers given to the land tracks, and a plurality of second headers respectively having second track addresses as consecutive numbers given to the groove tracks independently of the consecutive numbers of the land tracks. Digital filtering of values received from temperature sensors is also provided. The game is played by one player drawing a card from the deck; passing the card to another player who reads the question to the player.