In theory, chess can be solved because the rules create a closed, predictable system. In practice, however, chess cannot be solved because it’s beyond the capacity of any human mathematicians and beyond the capabilities of computers. There are 10120 potential variations of games in chess and around 1043 different potential positions on the board. To fully solve chess, every single one of these must be compared against the other.
Chess computers are now so strong that they are practically unbeatable. It is highly unlikely that even the greatest human players would beat a computer playing at a full capacity. This is because a computer can analyze millions of possibilities and compare them against each other within seconds. No human mind can hope to compete with such analytical powers.
It is probably easier to learn to play chess than bridge. It is harder still to learn the bidding language of bridge. Bridge can get somewhat more complicated because the players have to agree to certain parameters, which can change a player’s approach to the game. However, bridge has an element of luck which is not present in chess at all.
The difference is that in blitz chess each player must make all of their moves in 10 minutes or less. There is a minor variation to this rule if there are time increments involved. In rapid chess the players must make all of their moves in 30 minutes or less, which again, may be modified by increments.
The idea of a difference between blitz and bullet chess came about during the early days of chess when blitz games lasted between 3 to 10 minutes and bullet games lasted 3 minutes or less. These standards arose in a day before time controls could be manipulated to a much higher degree and these absolute definitions don’t always apply today.
In theory, a chess game could go on forever but in practice it is not possible. There’s a limit in terms of the lifespan of the players involved and most games are played with specific time restrictions which limit their length. Rules such as the 50-move limit and the rule of repetition also prevent chess games from going on forever.