Playing with double bishops in chess refers to having two bishops of the same color on the board. Double bishops can be a valuable asset for a player, as they provide greater control over the diagonals and can create threats to the opponent's pieces. Having double bishops can be particularly effective in open positions with many diagonals, as the bishops can work together to attack the opponent's pieces and create threats. However, players must also consider the pawn structure and the placement of their bishops, as having the bishops on the same color squares can limit their effectiveness.