It has an explanation. A historic explanation actually. In the course of the 1930s Futbol Club Barcelona admirers accustomed to arrive so far to check the final results in their staff, because they had been released on the blackboard which hung up within the newsroom of La Rambla newspaper (Found https://cashwinner.info/%e0%a6%ac%e0%a6%be%e0%a6%b0%e0%a7%8d%e0%a6%b8%e0%a7%87%e0%a6%b2%e0%a7%8b%e0%a6%a8%e0%a6%be-%e0%a7%ab-%e0%a7%a8-%e0%a6%ac%e0%a7%8d%e0%a6%af%e0%a6%ac%e0%a6%a7%e0%a6%be%e0%a6%a8%e0%a7%87-%e0%a6%b0/