White to play and checkmate in one move

Problems 001 to 012

1

(Unknown Composer)

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1. O-O-O#

Date added: 9/3/2020

2

(Unknown Composer)

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1.g3#

Date added: 2/1/2021

3

(Unknown Composer)

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Rg6#

Date added: 3/1/2021

4

(Unknown Composer)

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Rf8#

Date added: 5/1/2021

5

Black to move and mate in 1

(Unknown Composer)

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dxe1=Q#

Date added: 12/1/2021

6

(Unknown Composer)

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Re7#

Date added: 18/1/2021

7

After 1. ... - e5 white mates in 1 move

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... - e5
dxe6#

Date added: 19/1/2021

8

(Unknown Composer)

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bxc8=N#

Date added: 18/1/2021

9

(Karl Artur Leonid Ivanovich Kubbel')

Standard chess rules apply, the board is not rotated (i.e. white pawns move upwards), no lateral thinking is needed. Simply find the one -and only- move for white which mates the black king.

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Qa3#

No other move leads to checkmate
1.d8=Q (invalid move, pawn is pinned)
1.dxc8=Q+ Bb7
1.dxc8=N+ Ke8
1.Rxe5+ Be6+
1.Qxe5+ Be6+
1.Ng6+ Bxg6
1.Nf5+ Bxf5+
1.Bd6+ Kf6
1.Bh4+ Rg5
1.Qg5+ Qxg5

Date added: 18/1/2021