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* [[Double Check]]
* [[Skewer]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=15220 Trouble Spotter] by [[Harm Geert Muller]], [[CCC]], July 19, 2007
=External Links=
'''[[Tactics|Up one Level]]'''
[[:Category:Jacques Callot]]
