The Last Straw: Not exactly. Let's look at the position after 22. xe7:
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22...xg2+!, as  orchnoi played, does work after 23.xg2  f4+ 24. xf4 xf4
Now look at the position after 26... a4:
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Shamkovich played 27.c6+?. This is tempting because it robs the black king of its c6-square, but it's actually a mistake.
Look at the critical position:
Position after 30...c1+:
click for larger view31.d3?, as Shamkovich played, only blunders away the position after 31...b1+ 32.e3 g6!. 31.f3 was forced, when black could draw by continuously checking the white king. Still, I think both players deserve a medal for demonstrating a very "human"game. This game, even with its flaws, is a gem. | 
