In order to return to the top that is...
The Dutch need at least 2 points from their qualifiers against Moldova and Sweden to stand any chance of reclaiming the first spot.
Spain play against the Czech Republic (away) and Scotland (at home).
If the Netherlands win against Moldova and lose against Sweden (WL) or draw both matches (DD), then they need Spain to lose both matches.
WD: Spain must get at most 1 point.
LW: Spain must get at most 2 points.
DW: Spain must get at most 3 points (but mustn't win against the Czech Republic)
WW: Spain must get at most 4 points (but mustn't win against the Czech Republic)
If the Netherlands win both matches and Spain win against Czech Republic and draw against Scotland, they will be tied for 1st place.