Solution to Puzzle 19 from my Sudoku Puzzle Book

Puzzle 19 from my Sudoku Puzzle Book

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Step by step solution of puzzle 19

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Solution to Sudoku no 737

Sudoku no 737 (Easy)

Our younger son created this puzzle using a Javascript program which he wrote himself:

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Chess Solution no 28

White played 1. Nd4.

The black knight was pinned against the black queen, attacked 3 times and protected twice so could be lost. At this point the game was declared as 1-0 so I assume that black resigned.

It could have continued as follows:

1. ... Rb4

2. Bxb4 Qxb4

3. Nxc6 Qxa4

4. Rxa4 Rxc6

5. cxd5

This would leave the position as follows, which is hopeless for black:

Chess Puzzle no 28

The position below is from Michael Adams (2735) versus Elisabeth Paehtz (2451), which took place in 2007. It is white's move. What did he play?

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Solution to Sudoku no 736

Sudoku no 736 (Extreme)

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Solution to Sudoku no 735

This is the solution:

This is the winning answer sent in by Freddy Vargas:

Chess Solution no 27

1. f3 captures the black rook on the next move.

If

1. ... Rg8

2. Qh7+ also captures the black rook on the next move.

Chess Puzzle no 27

This position is from Timo Paakkonen (2283) versus Tuomo Halmeenmaki (2154), which was played in 2012. White to move. What should he play?

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