Comment:
Positions 753-755 show pure anchor positions in which the defending site has no compensation except the anchor and the standing in the race.
In position 753 the race is even whereas in position 754 and 755 black leads by 10 and 20 pips. In position 753 where the race is even black has no double. In position 754 where black leads by 10 pips he has a sound double and a clear take by white. In position 755 where black leads by 20 pips, white still has a marginal take.