Difference between revisions of "Puzzles"

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(added puzzle 8 by john tromp. it still needs the solution to be found)
(See also: Added link to Seymour's new puzzle page.)
(14 intermediate revisions by 6 users not shown)
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Solving puzzles is a very good way of becoming a stronger player. Solve as many as possible! And feel free to post your own puzzles here.
 
Solving puzzles is a very good way of becoming a stronger player. Solve as many as possible! And feel free to post your own puzzles here.
  
== Puzzle 1 ==
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== [[Piet Hein]]'s puzzles ==
By [[Piet Hein]]
+
  
Blue to play and win.
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See article [[Piet Hein's puzzles]]
  
[[Image:Piethein1.png]]
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== [[Claude Berge]]'s puzzles ==
  
<!-- <hex>R11 C11 Vd1 Vd2 Vd3 Vd4 Vd5 Vd6 Vd7 Vd9 Vd10 Vd11 Vh6 Vh7 Hc2 Hd8 Hh9 Hi4</hex> -->
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See article [[Claude Berge's puzzles]]
  
== Puzzle 2 ==
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== Bert Enderton ==
By [[Piet Hein]]
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Blue to play and win.
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=== Puzzle 1 ===
  
[[Image:Piethein2.png]]
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Red to play and win.
  
<!-- <hex>R3 C3 Ha1 Va2 Vb3</hex> -->
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<hex>R7 C7 Q1
 +
  Hc3 Hf3
 +
    Vc4 Hd4
 +
    Hc5 Ve5
 +
Va6</hex>
  
== Puzzle 3 ==
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=== Puzzle 2 ===
By [[Piet Hein]]
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Blue to play and win.
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Red to play and win.
  
[[Image:Piethein3.png]]
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<hex>R7 C7 Q1
 +
    Hc3
 +
          Hf5
 +
    Vb6</hex>
  
<!-- <hex>R6 C6 Vc3 Vf3 Vd5 Hb1 Hb5</hex> -->
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=== Puzzle 3 ===
  
== Puzzle 4 ==
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Red (Vertical) to play and win.
By [[Piet Hein]]
+
  
Blue to play and win.
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This is a very difficult puzzle whose complete solution is extremely complex.
  
[[Image:Piethein4.png]]
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<hexboard size="6x6"
 +
  contents="B c2 R f4"
 +
  />
  
<!-- <hex>R4 C4 Vd1 Va4 Hc2</hex> -->
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== Other authors ==
  
== Puzzle 5 ==
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=== Puzzle 1 ===
By [[Piet Hein]]
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By [[John Tromp]]
  
 
Blue to play and win.
 
Blue to play and win.
  
[[Image:Piethein5.png]]
 
  
<!-- <hex>R4 C4 Va4 Ha1</hex> -->
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<hex> R10 C10
 +
                  Ri1
 +
            Bg4 Rh4
 +
        Bf5 Rg5
 +
      Be6 Rf6
 +
  Bd7
 +
Rc8
 +
    Rd9 </hex>
  
== Puzzle 6 ==
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=== Puzzle 2 ===
By [[Piet Hein]]
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By ''lazyplayer''. Blue to play and win.
  
On the board of size 3 there are precisely two opening moves such that, with optimal play from both players, the board will be completely filled before the game is over. Which are the two opening moves?
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<hex> R7 C7
 +
Vb2
 +
He3
 +
Vb5
 +
</hex>
  
== Puzzle 7 ==
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=== Puzzle 3 ===
By Unknown
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By [[David J Bush]]. Taken from a game on [[Playsite]] in 2003. Red to play and win.
  
Red (Vertical) to play and win
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<hex> R10 C10 Q1
 +
              He2 Hf2 Hg2 Hh2 Hi2
 +
Va3 Hb3    Hd3 Ve3 Vf3 Vg3
 +
Va4 Vb4 Vc4 Hd4 Ve4 Hf4 Vg4 Vh4
 +
      Hb5 Vc5 Vd5 He5 Vf5
 +
              Hd6 Ve6
 +
                    Ve7
 +
                            Hg8
 +
              Hc9 Hd9
 +
</hex>
  
This is a very difficult puzzle whose complete solution is extremely complex.
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Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=14 thread].
  
[[Image:Puzzle7.png]]
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=== Puzzle 4 ===
 +
Designed by ''Door1'', helped by ''David J Bush''. Inspired by a game on [[Kurnik]] in May 2005. Blue to play and win.
  
<!-- <hex>R6 C6 Q1 Vf4 Hc2</hex> -->
+
<hex> R10 C10 Q1
 +
Hb2                Hg2
 +
                Hf3 Vg3
 +
  Vb4        Ve4 Hf4
 +
              He5
 +
        Vc6
 +
            Vd7
 +
              Vd8
 +
</hex>
  
== Puzzle 8 ==
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Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=212 thread].
By [[John Tromp]]
+
  
<hex> R10 C10
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=== Puzzle 5 ===
Rc8  Bd7 Rd9 Be6 Bf5 Rf6 Bg4 Rg5 Rh4 Ri1 </hex>
+
Designed by ''Arek Kulczycki''. Game where both players play very close to perfect. Move 7.b9 was the first mistake, however it was very hard to refute it.<br/>
 +
Blue to move and win (there is just 1 winning sequence).
 +
 
 +
<hexboard size="11x11"
 +
  coords="hide"
 +
  contents="B 4:h2 R 1:a4 R 5:b5 R 3:c6 B 6:e7 B 2:g8 R 7:b9"
 +
  />
 +
 
 +
=== Puzzle 6 ===
 +
From Ryan B. Hayward, "A puzzling Hex primer". Red to play and win.
 +
 
 +
<hexboard size="6x6"
 +
  coords="hide"
 +
  contents="R d1 B e1 R f1 B e2"
 +
  />
  
 
== See also ==
 
== See also ==
Line 73: Line 119:
 
* [[Ladder puzzles]]
 
* [[Ladder puzzles]]
 
* [[Puzzle server]]
 
* [[Puzzle server]]
 +
 +
[[Cameron Browne]] offers a lot of original puzzles in his book [[Hex Strategy Making the Right Connections]]
 +
 +
[[Matthew Seymour]] has created a website with 500 interactive Hex puzzles at http://www.mseymour.ca/hex_puzzle/hexpuzzle.html
 +
 +
[[category:Puzzle]]

Revision as of 02:41, 21 May 2020

Solving puzzles is a very good way of becoming a stronger player. Solve as many as possible! And feel free to post your own puzzles here.

Piet Hein's puzzles

See article Piet Hein's puzzles

Claude Berge's puzzles

See article Claude Berge's puzzles

Bert Enderton

Puzzle 1

Red to play and win.

abcdefg1234567

Puzzle 2

Red to play and win.

abcdefg1234567

Puzzle 3

Red (Vertical) to play and win.

This is a very difficult puzzle whose complete solution is extremely complex.

abcdef123456

Other authors

Puzzle 1

By John Tromp

Blue to play and win.


Puzzle 2

By lazyplayer. Blue to play and win.

Puzzle 3

By David J Bush. Taken from a game on Playsite in 2003. Red to play and win.

abcdefghij12345678910

Source: this Little Golem forum thread.

Puzzle 4

Designed by Door1, helped by David J Bush. Inspired by a game on Kurnik in May 2005. Blue to play and win.

abcdefghij12345678910

Source: this Little Golem forum thread.

Puzzle 5

Designed by Arek Kulczycki. Game where both players play very close to perfect. Move 7.b9 was the first mistake, however it was very hard to refute it.
Blue to move and win (there is just 1 winning sequence).

4153627

Puzzle 6

From Ryan B. Hayward, "A puzzling Hex primer". Red to play and win.

See also

Cameron Browne offers a lot of original puzzles in his book Hex Strategy Making the Right Connections

Matthew Seymour has created a website with 500 interactive Hex puzzles at http://www.mseymour.ca/hex_puzzle/hexpuzzle.html