What is the least number of knights needed to cover the entire board?












10














I’ve seen the solutions to the lowest amount of queens, bishops, and rooks are needed to cover an entire board, as in they can attack all squares and are the only type of piece on the board. What is the solution for this with knights?










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  • 16




    What do the green squares represent?
    – Pikamander2
    Dec 17 at 5:52
















10














I’ve seen the solutions to the lowest amount of queens, bishops, and rooks are needed to cover an entire board, as in they can attack all squares and are the only type of piece on the board. What is the solution for this with knights?










share|improve this question




















  • 16




    What do the green squares represent?
    – Pikamander2
    Dec 17 at 5:52














10












10








10







I’ve seen the solutions to the lowest amount of queens, bishops, and rooks are needed to cover an entire board, as in they can attack all squares and are the only type of piece on the board. What is the solution for this with knights?










share|improve this question















I’ve seen the solutions to the lowest amount of queens, bishops, and rooks are needed to cover an entire board, as in they can attack all squares and are the only type of piece on the board. What is the solution for this with knights?







theory knights






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edited Dec 19 at 10:52









fkraiem

1053




1053










asked Dec 16 at 23:20









Rewan Demontay

12519




12519








  • 16




    What do the green squares represent?
    – Pikamander2
    Dec 17 at 5:52














  • 16




    What do the green squares represent?
    – Pikamander2
    Dec 17 at 5:52








16




16




What do the green squares represent?
– Pikamander2
Dec 17 at 5:52




What do the green squares represent?
– Pikamander2
Dec 17 at 5:52










1 Answer
1






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oldest

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20














Depending on whether occupied squares need to be covered as well, the number is:




  • 12 knights (without covering occupied squares)

  • 14 knights (with covering occupied squares)


Problems like this are called domination problems and solutions for knights and other pieces as well as a reference are given on the wikipedia page on mathematical chess problems






share|improve this answer























  • You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
    – Grade 'Eh' Bacon
    Dec 17 at 19:45










  • I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
    – user1583209
    Dec 17 at 20:47











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









20














Depending on whether occupied squares need to be covered as well, the number is:




  • 12 knights (without covering occupied squares)

  • 14 knights (with covering occupied squares)


Problems like this are called domination problems and solutions for knights and other pieces as well as a reference are given on the wikipedia page on mathematical chess problems






share|improve this answer























  • You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
    – Grade 'Eh' Bacon
    Dec 17 at 19:45










  • I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
    – user1583209
    Dec 17 at 20:47
















20














Depending on whether occupied squares need to be covered as well, the number is:




  • 12 knights (without covering occupied squares)

  • 14 knights (with covering occupied squares)


Problems like this are called domination problems and solutions for knights and other pieces as well as a reference are given on the wikipedia page on mathematical chess problems






share|improve this answer























  • You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
    – Grade 'Eh' Bacon
    Dec 17 at 19:45










  • I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
    – user1583209
    Dec 17 at 20:47














20












20








20






Depending on whether occupied squares need to be covered as well, the number is:




  • 12 knights (without covering occupied squares)

  • 14 knights (with covering occupied squares)


Problems like this are called domination problems and solutions for knights and other pieces as well as a reference are given on the wikipedia page on mathematical chess problems






share|improve this answer














Depending on whether occupied squares need to be covered as well, the number is:




  • 12 knights (without covering occupied squares)

  • 14 knights (with covering occupied squares)


Problems like this are called domination problems and solutions for knights and other pieces as well as a reference are given on the wikipedia page on mathematical chess problems







share|improve this answer














share|improve this answer



share|improve this answer








edited Dec 17 at 0:11

























answered Dec 17 at 0:02









user1583209

12k21553




12k21553












  • You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
    – Grade 'Eh' Bacon
    Dec 17 at 19:45










  • I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
    – user1583209
    Dec 17 at 20:47


















  • You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
    – Grade 'Eh' Bacon
    Dec 17 at 19:45










  • I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
    – user1583209
    Dec 17 at 20:47
















You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
– Grade 'Eh' Bacon
Dec 17 at 19:45




You could consider increasing value of this answer by showing a layout with the resolved 14 knights [I see it as: 4 N on the 2nd rank, from C-F, 6 N on the 6th rank, from B-G, and 4 N on the 4th rank, B4, C4, F4, G4].
– Grade 'Eh' Bacon
Dec 17 at 19:45












I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
– user1583209
Dec 17 at 20:47




I tried to include a diagram, but did not succeed. Is it possible to show impossible (no Kings) positions?
– user1583209
Dec 17 at 20:47


















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