Dad's Puzzler
2x2 Piece must be moved to the lower left corner;
no other requirements.
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Dad's Puzzler Exchange
2x2 Piece must be moved to the lower left corner;
pieces 7 and 8 must move to the upper left corner and may be exchanged.
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Dad's Puzzler Exchange-Strict
Exchange upper left 2x2 with lower left pair;
the two lower left pieces must remain in same relative order;
other pieces do not matter.
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Dad's Puzzler Exchange-Full
Exchange upper left 2x2 with lower left pair;
the two lower left pieces may be exchanged;
other pieces must stay the same or be equivalent.
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Dad's Puzzler Exchange-Full-Strict
Exchange upper left 2x2 with lower left pair;
the two lower left pieces must remain in same relative order;
other pieces must stay the same or be equivalent.
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Dad's Puzzler Exchange-Full-Strict-All
Exchange upper left 2x2 with lower left pair;
the two lower left pieces must remain in same relative order;
other pieces must stay the same and cannot be exchange with equivalents.
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