Mattel Computer Chess's powerful saving move

[vonderlasa]

I just purchased this on eBay.
[Event "?"]
[Site "Wisconsin"]
[Date "2015.07.11"]
[Round "?"]
[White "Mattel Computer Chess Level 1"]
[Black "vonderlasa"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "25"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf5 d5 7. Bd3 dxe4 8.
Bxe4 Qxd1+ 9. Kxd1 Nxe4 10. Nxe4 Bxf5 11. Re1 Rd8+ 12. Bd2 Be7 13. c4 and after this move it simply removed the black king from the board.
Nonetheless, I adjudicated the game as a win for black.

Further games showed that it will remove the black king and or queen at some point. Has anyone else noticed this behavior? There is some minor corrosion in the battery compartment, which I cleaned. I used fresh batteries.

[vonderlasa]

I was finally able to complete a game. Here it is, warts and all pointed out by the near omniscent Komodo.


[Event "?"]
[Site "Wisconsin"]
[Date "2015.07.11"]
[Round "?"]
[White "Mattel Computer Chess Level 2"]
[Black "vonderlasa"]
[Result "0-1"]
[ECO "B21"]
[Annotator "Komodo 9.1 64-bit (6m)"]
[PlyCount "64"]

{B21: Sicilian: 2 f4 and Morra Gambit} 1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qd2
e6 (4... Nf6 5. Nc3 e6 6. Bb5 Bb4 7. a3 Nxe4 8. Qe3 Bxc3+ 9. bxc3 d5 10. Nf3
Qa5 11. Rb1 Qxc3+ 12. Bd2 Qxe3+ 13. Bxe3 Bd7 14. O-O O-O 15. Bxc6 Bxc6 16. Ne5
Rfc8 17. Nxc6 bxc6 18. f3 Nd6 19. Bf4 {Lemesre,J-Richard,E (2116) Lille 2010
0-1 (38)}) 5. Nf3 Nf6 6. Nc3 Bb4 {White has a very active position} 7. Bd3 $146
(7. e5 Ne4 (7... Nd5 8. a3 Qa5 9. Be2 Nxc3 10. bxc3 Bxc3 11. Ra2 Nxe5 {0-1 (11)
Chailert,J-Miciano,J Chiangmai 2013}) 8. Qe3 Nxc3 9. bxc3 Ba5 10. g3 Bb6 11.
Qd3 O-O 12. Be2 Qc7 13. Bf4 Bc5 14. Bf1 b6 15. Bg2 a5 16. O-O Ba6 17. Qd2 Bxf1
18. Rxf1 Rfd8 19. Bg5 Re8 20. Qf4 d6 21. Bh4 Nxe5 {Toth,N-Juhasz,J
Balatonlelle 2012 0-1 (40)}) (7. a3 Qa5 8. Bd3 Bxc3 9. bxc3 d5 10. e5 Nd7 11.
O-O Ncxe5 12. Nxe5 Nxe5 13. Qg5 Ng6 14. Bd2 Qc7 15. Rfe1 Qe7 16. Qg3 Bd7 17. c4
dxc4 18. Bxc4 Rc8 19. Qb3 Bc6 20. Bb4 Qg5 21. g3 Nh4 {Rubio,S-Diaz Alonso,A
Oropesa del Mar 1998 0-1}) 7... d5 8. e5 {White threatens to win material:
e5xf6} Ng4 {Black threatens to win material: Ng4xe5} (8... Nd7 9. a3 Ba5 10.
Qf4 $11) 9. Bb5 (9. Qf4 f5 10. O-O O-O $14) 9... Qa5 (9... f6 10. Qd4 Bxc3+ 11.
bxc3 Ngxe5 12. Nxe5 fxe5 13. Qxe5 $11) 10. O-O {White has an active position} (
10. h3 Nh6 $11) 10... O-O 11. Bxc6 bxc6 {Black has the pair of bishops} 12. Qd4
f5 13. Bd2 {Black has a cramped position} Ba6 14. Rfd1 $4 (14. a3 Be7 15. b4
Qc7 $11) 14... c5 $4 {Black threatens to win material: c5xd4. releasing the
pressure on the opponent} (14... Bc5 $142 {and Black has prevailed} 15. b4 Bxd4
16. bxa5 Bxf2+ 17. Kh1 f4 $19) 15. Qf4 $11 Nh6 (15... Qc7 16. a4 $11) 16. h3 {
Prevents intrusion on g4} (16. Nxd5 Bxd2 17. Ne7+ Kh8 18. Qxd2 Qb6 $14) 16...
Nf7 (16... Qc7 $142 $11) 17. g3 $4 {forfeits the advantage} (17. Nxd5 $142 $5
Bxd2 18. Qxd2 Qxd2 19. Ne7+ Kh8 20. Rxd2 $16) 17... h6 (17... d4 $142 18. a3
Bxc3 19. bxc3 dxc3 $17) 18. a4 $4 {gives the opponent counterplay} (18. Nxd5
$142 {the only rescuing move} Bxd2 19. Qxd2 Qxd2 20. Ne7+ Kh7 21. Nxd2 $11)
18... g5 $19 19. Qe3 d4 20. Nxd4 $4 {sad, but how else could White save the
game?} (20. Qe1 Bb7 21. Nb5 Bxf3 22. c3 $19) 20... cxd4 21. Qxd4 Rfd8 (21...
Nxe5 $142 {secures the point} 22. Qe3 Bb7 23. Nb5 Nf3+ 24. Kf1 Nxd2+ 25. Rxd2
Bxd2 26. Qxe6+ Kg7 27. Kg1 $19) 22. Qe3 Nxe5 (22... Bb7 $142 {and Black can
already relax} 23. Be1 a6 $19) 23. h4 $4 {causes further problems for White} (
23. Nb5 $142 Bxd2 24. Qxe5 $17) 23... Bb7 $19 24. hxg5 Nf3+ 25. Kf1 (25. Kg2 {
otherwise it's curtains at once} Nxg5+ 26. Kh2 $19) 25... Qa6+ 26. Kg2 Nxg5+
27. Kg1 Bxc3 28. Qxc3 (28. Bxc3 Qc6 29. f3 Nxf3+ 30. Kf2 Nh2 31. Rd3 Ng4+)
28... Qe2 29. Qb4 (29. Qe3 {cannot change destiny} Nf3+ 30. Kh1 Nxd2+ 31. Kg1
Nf3+ 32. Kg2 Ng5+ 33. Rd5 Bxd5+ 34. Kg1 Qh5 35. f3 Bxf3 36. Qd3 Ne4 37. Qxf3
Qxf3 38. Rf1 Rd1 39. Rxd1 Qxg3+ 40. Kf1 Qf2#) 29... Nh3+ 30. Kh2 Qxf2+ 31. Kxh3
Qg2+ 32. Kh4 Qh2# 0-1