Minimum pieces for a checkmate

fktyagi

Analyze a position where black is left with a king only.
 Now, what is the minimum number of pieces (depending upon blacks king's position ) required for white to checkmate black .
   It will be great if you can give position of white pieces also.

Strangemover

A king and a queen or rook can give checkmate vs a lone king so 2.

DeirdreSkye

King and one heavy piece(rook or queen) or King and 2 light pieces(at least 1 bishop ) is the minimum that can force mate.

ichiro_bloodmoon

If with minor pieces at least two but only if it's the Bishop pair or a Bishop and Knight. Two Knights alone can't force a mate unless their is a pawn or two involved. With heavy pieces then one should be enough such as a solo Rook and King vs solo King or even King and Queen vs solo King.

ichiro_bloodmoon

Actually I have checkmated the computer once with a solo Bishop and pawn. So their are rare instances where it's possible to mate with a solo minor pieces such as a knight if the opposing King is smothered by one of his pieces or pawn etc.

eric0022


King and pawn vs king and pawn also possible (but before that there must be another piece on the board).

 

 

eric0022

Strangemover is correct: the minimum number of pieces required to checkmate a lone king is two; one king and one queen or rook.

 

DeirdreSkye is also correct. The minimum strength required to force checkmate against a lone king is a king and two minor pieces.

 

A knight alone can sometimes perform a smothered mate against an enemy king if the enemy king is surrounded by friendly pieces.

eric0022

 

 

HorribleTomato

2 pawns no promote

HorribleTomato

 

pipxr

pretty sure it's 2

DeirdreSkye
eric0022 wrote:


King and pawn vs king and pawn also possible (but before that there must be another piece on the board).

 

    Every one knows these positions.

You didn't bother to take a look at what the OP says. He is talking for Black king alone.

 

"Analyze a position where black is left with a king only."

eric0022
DeirdreSkye wrote:
eric0022 wrote:


King and pawn vs king and pawn also possible (but before that there must be another piece on the board).

 

    Every one knows these positions.

You didn't bother to take a look at what the OP says. He is talking for Black king alone.

 

"Analyze a position where black is left with a king only."

 

Wow. You are right. I missed those words earlier.

 

Not sure if a king and a passed pawn versus a lone king will suffice to the above question, even though the pawn has to be first promoted to a queen or rook safely,

DragonPhoenixSlayer

Assuming there are no pawns an your opponent only has their king left then a rook would be the minimium required to get a checkmate.

ShaoniHiya

HorribleTomato wrote:

 

mr.horrible tomato i am sorry to say that this position is illegal for there is no legal last move for black

ShaoniHiya

HorribleTomato wrote:

 

mr.horrible tomato i am sorry to say that this position is illegal for there is no legal last move for black

ShaoniHiya

HorribleTomato wrote:

 

mr.horrible tomato i am sorry to say that this position is illegal for there is no legal last move for black

ShaoniHiya

HorribleTomato wrote:

 

I would be glad to be corrected if I have made a mistake

eric0022

@ShaoniHiya

 

Four times you posted above. Therefore, four times your conclusion is inaccurate.

 

 

HorribleTomato

Thank you for supporting me Eric! Yeah, he said when there is a lone king. The second the Q was sacrificed, it became lone king v. King and 2 pawns. But this is like fools mate, possibly even worse: HOW COULD YOU BLUNDER LIKE THAT A QUEEN UP!? And then get mated faster.