Train Track

Train Track is a classic puzzle devised by Philipp Hübner. it appears in Puzzler Beyond Sudoku (only availible in WHSmith). It is popular. The rules are different to other puzzles: Lay tracks to enable the train to travel from village A to village B. The numbers on the outside of the grid indicate how many pieces of rail go in that row or column. There are only straight and curved rails plus the track cannot cross itself.