Lovin’ Randy’s great analysis. Now for the patzer version.
The first cell phone I owned came with a chess game pre-installed. It was not that strong even for the time, but like all cyber-chess programs it was great at refuting unsound sacs, even ones that might work against a human Expert OTB. I enjoyed many games with the phone while waiting out exec sessions at meetings I covered as a reporter.
My chess career nearly ended when I lost as White to the evil beast thusly:
1. e4 e6
2. d4 d5
3. Nc3 Bb4
4. Ne2!? dxe4
5. a3 Bxc3+
6. Nxc3 Nf6
7. Bg5 Nc6
8. Bb5 0-0? (…h6 is much better)
9. Bxc6 bxc6
10. Nxe4
and here 10…e5 is the best try. Instead, the beast played
10. Nxe4 Qd5?!
I knew this could not be good, and chuckled as I played
11. Nxf6+ gxf6
12. Bxf6
After 12…Qxg2 I stopped chuckling. (I wish we could paste diagrams here.) After long thought and self-loathing, I groveled with
13. Rf1? Ba6
and lost quickly—though White can fight on in a grim struggle after the computer-like 14. Kd2, which I did not see.
Then I decided to give up chess. Lost to a phone…Patzers, of course, are nothing if not stubborn. The ghost of John Henry rumbled at me from the Great Beyond to get back on the saddle and charge up the phone for a rematch. That was easy to do once I studied this line and saw the obvious (to a real chessplayer)
13. Qf3! kaputski. If Black takes the Q, it’s mate with Rg1.
After
13. Qf3 Qg6
14. 0-0-0
even I could not mess it up. John Henry smiled. My chess career limped on.
That was the last phone I owned that had a chess program.