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Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

_{^{Note: Since I am the OP, I choose to not accept my own answer as correct. Please, beat my answer with something better. :D}}

Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

_{^{Note: Since I am the OP, I choose to not accept my own answer as correct. Please, beat my answer with something better. :D}}

Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

Put a series of stationary smaller stars aligned in both sides of the big star (or perhaps, instead of stationary, make them rotating all with the same angular velocity). Don't care about spending a lot of fuel and energy to keep a bunch of stars stationary in relation with each other in order to fight against gravity and extreme tidal forces (all those stars would themselves provide more than enough energy for that). You will probably need to interlace a series of disposable rocky planets featuring the best refrigeration technology possible between the stars in order to build hi-tech bases able to keep everything in its correct place. Also, all of that will significantly screw up the big star rotation and make it deformed and ellipsoidal and would significantly deform the smaller stars too, but who cares?

Behind the last of those stars, in one of the sides, put the planet to be protected, inside a series of concentric Dyson spheres.

When the central star explode, it will quickly erode the first star in each side, which will protect the following stars from the blast. The first star debris however, will erode the following stars, and as it erodes, it exposes the second star which will also erode exposing the third and so on. The intermediary planets are disposable and doomed. Since there is a lot of stars between the supernova and the protected planet, it will take a significant time for the supernova to erode all of them. Since the supernova will last only a couple of days, eventually it will be extinguished with hopefully enough spare stars relatively unnafected between the detonated used-to-be star and the planet.

The reason for placing stars in both sides is to make it gravitationally more stable, keeping the barycenter at the supernova star. Also, this would give the opportunity to build two survivable planets instead of one, so you have a backup if something go wrong with one of them.

The series of debris will emit a lot of heat and light, just as all the dust and gas present from the combined stellar winds of all of those stars. Also, at least a few debris will eventually hit the protected planet. All of that will significantly damage the planet, but still much less than the supernova impact. So, use the series of concentric Dyson spheres as ablation shields and use your best technologies to keep them in place even if they are severely damaged. Eject to outer space instead of towards the planet any parts of any Dyson sphere ablation shield that became in too bad shape to continueing being useful.

Also, whatever is kept in the planet, it will need to be veeeery resistant from the torrent of neutrinos constantly hitting it.

Finally, there still are no guarantees.

_{^{Note: Since I am the OP, I choose to not accept my own answer as correct. Please, beat my answer with something better. :D}}