Find the best winning line. Some positions may have a number of winning lines but the answers given are those that the chess engine Houdini 4 evaluates as best and will have a valuation at least 2 – 3 points higher than the next best. The solutions to positions #5 & 6 as played are revealed by computer analysis as not being the best but are nevertheless interesting.


In the actual game White played the intuitive but inferior 1. Qd8 and had to settle for a draw.