Difference between revisions of "Puzzles"

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(Consistently show coordinates in puzzles.)
(Puzzle 6: Fixed position orientation (incorrect edges) and added a link and a comment)
(3 intermediate revisions by 2 users not shown)
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=== Puzzle 3 ===
 
=== Puzzle 3 ===
  
Red (Vertical) to play and win.
+
Red to play and win.
  
 
This is a very difficult puzzle whose complete solution is extremely complex.
 
This is a very difficult puzzle whose complete solution is extremely complex.
Line 38: Line 38:
 
<hexboard size="6x6"
 
<hexboard size="6x6"
 
   contents="B c2 R f4"
 
   contents="B c2 R f4"
 +
  />
 +
 +
=== Puzzle 4 ===
 +
 +
Red to play and win.
 +
 +
<hexboard size="7x7"
 +
  xcontents="B b4 c4 d4 R b3 b6"
 +
  contents="B f4 e4 d4 R f5 f2"
 
   />
 
   />
  
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By [[David J Bush]]. Taken from a game on [[Playsite]] in 2003. Red to play and win.
 
By [[David J Bush]]. Taken from a game on [[Playsite]] in 2003. Red to play and win.
  
<hex> R10 C10 Q1
+
<hexboard size="10x10"
              He2 Hf2 Hg2 Hh2 Hi2
+
  coords="show"
Va3 Hb3    Hd3 Ve3 Vf3 Vg3
+
  contents="R a3 e3 f3 g3 a4 b4 c4 e4 g4 h4 c5 d5 f5 e6 e7
Va4 Vb4 Vc4 Hd4 Ve4 Hf4 Vg4 Vh4
+
B e2 f2 g2 h2 i2 b3 d3 d4 f4 b5 e5 d6 g8 c9 d9"
      Hb5 Vc5 Vd5 He5 Vf5
+
  />
              Hd6 Ve6
+
                    Ve7
+
                            Hg8
+
              Hc9 Hd9
+
</hex>
+
  
 
Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=14 thread].
 
Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=14 thread].
Line 85: Line 89:
 
Designed by ''Door1'', helped by ''David J Bush''. Inspired by a game on [[Kurnik]] in May 2005. Blue to play and win.
 
Designed by ''Door1'', helped by ''David J Bush''. Inspired by a game on [[Kurnik]] in May 2005. Blue to play and win.
  
<hex> R10 C10 Q1
+
<hexboard size="10x10"
Hb2                Hg2
+
  coords="show"
                Hf3 Vg3
+
  contents="
  Vb4        Ve4 Hf4
+
R g3 b4 e4 c6 d7 d8
              He5
+
B b2 g2 f3 f4 e5"
        Vc6
+
  />
            Vd7
+
              Vd8
+
</hex>
+
  
 
Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=212 thread].
 
Source: this [[Little Golem]] forum [http://www.littlegolem.net/jsp/forum/topic2.jsp?forum=50&topic=212 thread].
Line 107: Line 108:
  
 
=== Puzzle 6 ===
 
=== Puzzle 6 ===
From Ryan B. Hayward, "A puzzling Hex primer". Red to play and win.
+
From Ryan B. Hayward, "A puzzling Hex primer" (https://webdocs.cs.ualberta.ca/~hayward/papers/puzzlingHexPrimer.pdf). Red to play and win.
  
 
<hexboard size="6x6"
 
<hexboard size="6x6"
 
   coords="show"
 
   coords="show"
   contents="R d1 B e1 R f1 B e2"
+
   contents="R a4 a6 B a5 b5"
 
   />
 
   />
 +
 +
Note that this position is [[Equivalent patterns|equivalent]] to the position with the pieces at a5 and a6 removed.  This could arise in response to the [[Small_boards#Winner_depending_on_the_first_move|winning opening move a4]].
  
 
== See also ==
 
== See also ==
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[[Matthew Seymour]] has created a website with 500 interactive Hex puzzles at http://www.mseymour.ca/hex_puzzle/hexpuzzle.html
 
[[Matthew Seymour]] has created a website with 500 interactive Hex puzzles at http://www.mseymour.ca/hex_puzzle/hexpuzzle.html
  
[[Ryan Hayward]] and [[Bjarne Toft]] include several sets of puzzles in their book [[Hex: The Full Story]], including 49 puzzles originally published in Politiken, 28 unpublished puzzles by Jens Lindhard, and 99 puzzles by Henderson.
+
[[Ryan Hayward]] and [[Bjarne Toft]] include several sets of puzzles in their book [[Hex: The Full Story]], including 49 puzzles originally published in Politiken, 28 unpublished puzzles by Jens Lindhard, 99 puzzles by Henderson, and the 4 puzzles by Bert Enderton.
  
 
[[category:Puzzle]]
 
[[category:Puzzle]]

Revision as of 21:24, 20 February 2021

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 to play and win.

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

abcdef123456

Puzzle 4

Red to play and win.

abcdefg1234567

Other authors

Puzzle 1

By John Tromp

Blue to play and win.


abcdefghij12345678910

Puzzle 2

By lazyplayer. Blue to play and win.

abcdefg1234567

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).

abcdefghijk12345678910114153627

Puzzle 6

From Ryan B. Hayward, "A puzzling Hex primer" (https://webdocs.cs.ualberta.ca/~hayward/papers/puzzlingHexPrimer.pdf). Red to play and win.

abcdef123456

Note that this position is equivalent to the position with the pieces at a5 and a6 removed. This could arise in response to the winning opening move a4.

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

Ryan Hayward and Bjarne Toft include several sets of puzzles in their book Hex: The Full Story, including 49 puzzles originally published in Politiken, 28 unpublished puzzles by Jens Lindhard, 99 puzzles by Henderson, and the 4 puzzles by Bert Enderton.