[解析]
Dear Peter,
I am writing to offer my sincere congratulations to you on your winning the first prize in the Chinese Chess Network Challenge.As your friend,I just want you to know how glad I am at your success.(祝贺他获奖)
"Everything comes to him who waits."For these years,you've shown great interest in Chinese chess and kept on practicing it every day.Not only have you read many books about Chinese chess strategy,but also you have competed in all kinds of Chinese chess contests.【高分句型一】Finally,you've succeeded in winning the online competition!(肯定他付出的努力)
So I'm so happy that you become champion of this network challenge.At last,I hope to play Chinese chess with you so that we can make progress together.【高分句型二】Please tell me when you are available.(询问何时方便,在网上切磋棋艺)
Congratulations again.
Yours,
Li Hua