Handicaps and challenge types

When you invite someone or post to the waiting room, you choose a challenge type:

• Proper handicap (the default) — the system sets colour, handicap stones, and komi from both players' ratings for a fair game.
• Conventional handicap — handicap by rating difference, with komi 0.5 when the game isn't even.
• Manual — you choose the colour, handicap, and komi yourself.