Yeah, Deutsche Bahn can find a route from Berlin Jannowitzbrücke to Barcelona Sants that takes less than 20 hours (as opposed to 2 days) https://www.bahn.de/buc

Yeah, Deutsche Bahn can find a route from Berlin Jannowitzbrücke to Barcelona Sants that takes less than 20 hours (as opposed to 2 days) https://www.bahn.de/buchung/fahrplan/suche#sts=true&so=Jannowitzbr%C3%BCcke%20(S%2BU)%2C%20Berlin&zo=Barcelona%20Sants&kl=2&r=13:16:KLASSENLOS:1&soid=A%3D1%40O%3DJannowitzbr%C3%BCcke%20(S%2BU)%2C%20Berlin%40X%3D13418126%40Y%3D52515503%40U%3D81%40L%3D732534%40B%3D1%40p%3D1733173731%40&zoid=A%3D1%40O%3DBarcelona%20Sants%40X%3D2140368%40Y%3D41378911%40U%3D80%40L%3D7100064%40B%3D1%40p%3D1733178662%40i%3DU%C3%97007171801%40&sot=ST&zot=ST&soei=732534&zoei=7100064&hd=2024-12-14T13:37:11&hza=D&hz=%5B%5D&ar=false&s=true&d=false&vm=00,01,02,03,04,05,06,07,08,09&fm=false&bp=false&dlt=false&dltv=false https://www.bahn.de/buchung/fahrplan/suche#sts=true&so=Janno... Hopefully, the existence of a black-box oracle makes it easier to find out where the gaps are.