Logic Masters Deutschland e.V.

Opuntia, often called the prickly pear cactus after their colorful and spiny pear shaped fruits, is a genus of closely related flowering cacti species native to the Americas. With a bit of preparation, both the fruits and green cactus paddles (called nopales in Mexico) are edible. The cactus is an important part of the legend of the founding of the city of Tenochtitlan, inspiring the Mexican coat of arms which prominently displays such a cactus. Tenochtitlan quickly became the largest city in the pre-Columbian Americas, and one of the largest in the world at the time.

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RULES:

Normal Sudoku: Fill the grid with digits 1 to 9 appearing once each in every row, column, and 3x3 box.
X pairs: Digits connected by an X must sum to 10. All X's are given.
Killer Cages: Digits in a cage must sum to the value in the upper left hand corner of the cage. Digits may not repeat within a cage. ? is a placeholder digit standing in for 1-9 for the leading digit and 0-9 for all others.
Kropki Dots: Digits connected by a white dot are consecutive. Digits connected by a black dot are in the ratio 1:2. Not all dots are given.
German Whisper Lines: Adjacent digits on a green line must have a difference of at least 5.
Prickly Pears: If given N prickly pears (pink circles), the digit N must appear in at least one circle and no digit greater than N may appear in any circle. Digits may repeat in circles if allowed by other rules.

LINK:
Solve this puzzle in SudokuPad