Inspired by Kevan’s throwaway comments about street chess, I thought urban chess would work better if it were based not on finding, but on setting out chess pieces.
So, take eight pawns of one colour. Set them out on paving slabs along your route to work, each one eight slabs away from some fixed point worth marking (your home, the bakery, a pillar box). Each time you pass them, you may move them one slab further. If any reach their destinations, you win.
1. To save needless frustration, play in one direction only.
2. If you know that you walk the same route as someone else, but in the opposite direction, get them to play with the other colour of pawn.