Im going to show u a position Tinsley once lost. This opening is 24-20 Double corner. A popular and rahter famous line of the Doubld Corner is 24-20. It is brought up from 9-14 24-20 5-9 or 9-14 22-18 5-9 then 24-20. It leads to a landing-often mis-played and lost. 9-14 24-20 5-9 22-18 10-15(while 11-16 is another popular line this way gives more chances for white to lose. Im also fond of 12-16 going into a doctor formation.) 28-24(standard) 15-22 26-10( 25-16 is infeior after 7-10)7-14 (6-15 weakens double corner) 25-22 1-5 22-17 14-18 23-14 9-18 30-26 3-7(made with going to square in mind, and keeps single corner strong as well as not disturbing the double corner) 26-22(best to cut off the piece on 18. also 32-28 will draw shown at note A) 18-25 29-22 7-10( 11-16 will also draw) 27-23 ( the continuatoin is standard play for white.) 11-15 23-19 6-9 ( 5-9 was usual way until Bernstein adopted this vs Tinsley in the 1946 Newark Nat. Ty. game can be veiwed on wylliedraughts.co.uk game archive.) 17-13 9-14 22-17 2-6 20-16 15-18( the stage is set. This is where the fatal 32-28? has so often been made. The open board with 32-27 is the only draw shown later. When a natural is good enough to fool a grandmaster like Tinsley it's one to remember!)32-28(the losnig move. the correct move here is shown at note B) 18-22* 19-15 12-19 13-9 6-13 15-6 14-18 24-15 22-25*(correct to hold the win and catch a free piece) 17-14 18-23*(correct to hold the piece on 30) 14-10(as good a try as anything) 25-29 10-7 29-25 15-10 13-17! 21-14 23-26 31-22 25-11 wins. (note B 32-27 (is best move) 5-9*(this 5-9 is forced, and 18-22 loses after 27-23 and 24-20.) 19-15*(with either capture the draw is secure)(note A 32-28 11-15 17-13(17-14 I think loses)8-11 26-23 18-22 23-18 7-10 21-17 6-9 13-6 2-9(it would be hard for the beginner to find his way from here) 20-16! 12-19 31-26! 22-31 17-13 15-22 24-6 31-24 28-19(though a man down this is a draw play continue as)4-8 6-2 8-12 13-6 11-16 ect... Thanks for your time. Hope the play here is readable and not frustrating. take care and have a blessed day