Poorva Express: हुगली सी बहती तेरी चाल है पूर्वा तू बेमिसाल है - Keshav Singh

3 Rakes...GAD DEP: Su, Mo, Tu ( We Rake is repeat of Mo Rake)
Su: GAD-NGP Shivnath, Arrive NGP @ Mo
Mo: NGP-BSP Shivnath, Arrive BSP @ Tu
Tu: BSP-NGP ICE, Arrive NGP @ Tu
We:...
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NGP-BSP ICE, Arrive BSP @ We
We: BSP-GAD Pass, Arrive GAD @ We
We: GAD-NGP Shivnath

i think its 2 rakes becoz
let rakes be X and Y
talking about X
X departed from gad on sun at 18:00 arrived at 05:30 {on mon} ,departed as intercity from ngp. arrived back to ngp as intercity from bsp.{on mon}departed at 23:30 from ngp{on mon} arrived at tuesday at bsp. ITS MAINTAINENCE TIME FOR X, departed from bsp...
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at 14:20 as a passenger to gad, departed from gad at 18:00 {on tuesday}
talking about Y
Y departed from gad on mon at 18:00 arrived at 05:30 {on tue} ,departed as intercity from ngp. arrived back to ngp as intercity from bsp.{on tue}departed at 23:30 from ngp{on tue} arrived at wednesday at bsp. ITS MAINTAINENCE TIME FOR Y, departed from bsp at 14:20 as a passenger to gad, departed from gad at 18:00 {on wednesday}.
ive travelled on both rakes in ac ,one of the rakes have complete bio toilets in ac,other have it only in few. also used as passenger infinite times
2 rakes are enough.