2959c81e_ufficient_Mating_Material_Rule__2
[0] Example K [2] 
If you think these examples are not enough live, then please see this one. This was the setup between Friedrich Amelung and Helmersen in Tallinn in 1890. 1.Ngxf6+ Qxf6+ (if 1...exf6, the next would be 2.Ne7#) At this point the game is drawn according to the rule in subject, because the game can not end in either side's win. Because white has to take the queen: 2.Hxf6+, then black has to take that knight: 2...exf6 Now both kings are blocked, none of them can move, and none of them is attacked. Only the queen side pawns remain, but they will be blocked sooner or later too. Checkmate is not possible. Thanks for the example to Pal Benyovszki. If you have the whole game, please send it in!
[E4EC] The insufficient Mating Material Rule
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