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Nick Faulks vs Peter D Lalic
Thames Valley League (2023), Surbiton CC, London ENG, Apr-18
English Opening: Anglo-Scandinavian Defense. General (A10)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Apr-19-23
Premium Chessgames Member
  PeterLalic:


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"In chess, a pure mate is a checkmate position such that the mated king is attacked exactly once, and prevented from moving to any of the adjacent squares in its field for exactly one reason per square.

Each of the squares in the mated king's field is attacked or "guarded" by one—and only one—attacking unit, or else a square which is not attacked is occupied by a friendly unit, a unit of the same color as the mated king. [...]

Pure mates are of interest to chess problem composers for their aesthetic value. In real gameplay, their occurrence is incidental."

https://en.wikipedia.org/wiki/Pure_...

Apr-19-23
Premium Chessgames Member
  PeterLalic: I have just realised that this might not be a pure mate.

In clockwise order: a3 is attacked by only the bishop; a4 is guarded by only the pawn; b4 is guarded by only the rook; b3 is attacked by only the rook; and b2 is guarded by only the knight.

However, a2 is both occupied by the pawn and attacked by the rook. Does that fact contravene the following definition of a pure mate?

"Each of the squares in the mated king's field is attacked or "guarded" by one—and only one—attacking unit, or else a square which is not attacked is occupied by a friendly unit, a unit of the same color as the mated king."

Apr-19-23
Premium Chessgames Member
  fredthebear: Looks like double jeopardy to me.

Did you know that CGs member stone free or die / Zappa XP and his sock puppets invented numerous checkmates? The story litters these web pages.

Apr-20-23  stone free or die: Not <Zappa XP>. Me.

How many times do "we" have to tell you?

And yes, Railroad, Escalator, Balestra, and Q+B dovetail are nice mates, thank you very much.

Apr-20-23  stone free or die: Now, please remind me why you summoned me, Aladdin of the forest?

(Each day being a reset...)

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