This map visualizes the provisional results of constituency races, using the latest figures from the Election Commission:

These results have Pheu Thai netting 203 constituency seats, but there are some 23 races that are probably too close to make a definitive call in the following provinces: Bangkok, Samut Prakan, Kanchanaburi, Nakhon Nayok, Prachinburi, Samut Sahkon, Amnat Charoen, Buriram, Ubon Ratchathani, Nakhon Sawan, Phitsanulok, and Yala. By my count, Pheu Thai is ahead in 12 of these races and trails in 11.
Assuming that these results hold, Pheu Thai’s success is rooted in …

The map below visualizes predictions for the 375 constituency races published in Thai Rath and reported by BangkokPundit on Friday.

Note that: 1) The map was put together to indicate seats won by each party by province, so the location of the dots may not (likely will not) correspond to the exact constituency; 2) The Thai Rath predictions had some missing information, which I filled in with more/less educated guesses. As a result, there could be some minor mistakes about both seat totals for each party and the locations of seats …