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# The Delta Unfold

Jun 23, 2016, 11:56 PM

“Unfold” the coin delta in a series of single-coin moves…

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# Always Three

Jun 16, 2016, 11:51 PM

By moving one coin at a time, reach the Goal position so that after each move…

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# The Coined Rows

Jun 09, 2016, 11:59 PM

Eight coins are arranged into 4 rows of three coins each. Move just two coins to get…

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# Olympic Coins

Jun 02, 2016, 11:43 PM

Change a stylized “Olympic” pattern into the one shown in the Goal. Single-coin sliding moves to do that.

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# The GO Challenge

May 26, 2016, 11:57 PM

Convert the “G” letter into the “O” letter. A move consists of sliding a coin to a new position where it has to touch at least two other coins.

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# In Puzzleland

May 19, 2016, 3:45 PM | by Sam Loyd

Nine coins placed in a 3×3 array, produce 8 rows of three coins each – three horizontal rows, three vertical rows and two main diagonals. Move the minimum possible number to…

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# Coins & Triangles

May 12, 2016, 8:18 PM

Fifteen equilateral triangles can be spotted in this arrangement. What is the minimum number of coins to be removed in order to get rid of all the equilateral triangles in it?

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# Wi-Fi Switch

May 05, 2016, 2:15 PM

Convert the “W” letter into the “F” letter. A move consists of sliding a coin to a new position where it has to touch at least two other coins.

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# Nob’s H-2-O

Apr 28, 2016, 11:54 PM

Convert the “H” letter into the “O” letter – a 3×3 coin square without the central coin. A move consists of sliding a coin to a new position where it has to touch at least two other coins.

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# The Six Pennies

Apr 21, 2016, 11:16 PM

Turn the two rows of coins into the coin circle in just three moves. A move consists of sliding a coin to a new position where it has to touch at least two other coins.

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# Coin Cup

Apr 14, 2016, 3:49 PM

Move just two coins to turn a coin cup upside-down. The restriction is that after each move a moved coin should touch two other ones.