The following move order in a chess game produces an incredibly complicated and wild variation of the Owen’s defense:
1. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 f5 5. exf5 Bxg2
6. Qh5+ g6 7. fxg6 Bg7 8. gxh7+ Kf8 9. Nf3
Yes, it is Black’s move in the diagrammed position and Black can capture the proverbial WHOLE ROOK at h1! So from a stand point of material, Black is “winning”, however after Ne5 the Houdini (And StockFish which is the built in ICC chess playing program) chess playing computer program evaluates White’s position as close to winning!
So what is going on here? Black has an extra Rook on the Board and yet he is in danger of losing. White’s material deficit is more than offset by Black’s exposed King. Black’s very unsafe King can be construed as a positional feature of the chess position which more than negates his “material advantage“.
Computers, of course, do not shy away from complex positions like this. Most Non-(Tal , Shirov , Nakamura ) chess players would instinctively not enter into difficult variations like this one, that can come up in the Owen’s defense, without home preparation assisted by programs like Houdini or Fritz. Dimitry Gurevich, a GM player in his 50s , welcomes the opportunity to enter into complicated variations like this along with his compadre Alexander Shabalov. Both players trust their ability handle the challenging complications over the board.