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International Checkers» Forums » Sessions

Subject: Position Puzzle 16 rss

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Introduction
Two excerpts of games I've played today and which shows the depth of the game of International Checkers. The second problem is a clever endgame situation. And then there is a bonus Position Puzzle (III), which happened during the writing process of this article and was too beautiful not to show here.

Problem Ia
Black is thinking about moving into the gate/loop with 28-33.

On the black move 28-33 white want to respond with 30-24. Wise or not?

Solution Ia
Spoiler (click to reveal)

1. ... 28-33
2. 30-24 33x31
3. 24x4 13-18
4. 4x22 27x18



Black will obtain his king way before white can do. So not a wise move to make!





Problem Ib
Black is thinking about moving into the gate/loop with 28-33.

On the black move 28-33 white want to respond with 29-23. Wise or not?

Solution Ib
Spoiler (click to reveal)

1. ... 28-33
2. 29-23 33x31
3. 23-19 13x24
4. 30x19 14x23
5. 25x5 31-36
6. 5x21 16x27



This is what actually happened in the game and not wise either! I should have thought things deeper. I should have moved 2. 37-32. All options are then open.





Problem II
White moved 27-16 followed by a black 19-14.

White to move and win

Solution II
Spoiler (click to reveal)

1. 36-31 26x37
2. 33-28



2. ... 14x32
3. 16x38 37-41
4. 38-32 41-46
5. 32-5 3-9
6. 29-23 46x19
7. 5x23

- or -

4. ... 41-47
5. 29-24 47x20
6. 15x24





Problem III

Black is one piece behind. He wants to enforce a breakthrough. Is a black 23-29 wise?

Solution III
Spoiler (click to reveal)

1. ... 23-29
2. 27-21 29x27
Majority capture applies.
3. 21x25



Black had to move 27-31 or it will be thrown back. White will respond with 28-23. Thus one of the black pieces at 34 or 13 will be lost. And with 6 against and considering the strong position in the lower right corner, white will win the game.



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