How much did alex rider challenge herod sayle in the game of snooker in chapter 9?

In chapter 9 of "Stormbreaker," Alex Rider challenges Herod Sayle to a game of snooker for a stake of £10,000. The match serves as a tense moment in the story, highlighting Alex's bravery and strategic thinking as he faces a powerful adversary. The high stakes add to the intensity of the encounter, showcasing both characters' personalities.