George Tsavdaris wrote:
Me - G.Vortex
1. f4 d5
2. d4 Nc6
3. c3 Nh6
4. g3 g6
5. h3 Bg7
6. Nj3 e6
7. Bf3 Ae7
8. Ah2 Bd7
9. Cg2 O-O
10. e3 j5
11. Nd2 Rf8
12. Be2 Kh8
With the new King Safety code in place, this looks more comfortable based on the pawn structure. A wise move.
George Tsavdaris wrote:
13. Nf3 e5
14. Nh4 i5
Black has just played a Steinitz flank attack move!
George Tsavdaris wrote:
15. dxe5 ixh4
White gives up a knight on move 15 for the purpose of wrecking the black king position, but Vortex has brand new King Safety code and it knows how to reconstitue the position. This game will feature both players being "loose" with material for the purpose of "smacking around" the other player. It's just a matter of who can get to who first. This is a very different approach to the game, more like Greco in the 1600's of the Italian Era of chess.
George Tsavdaris wrote:
16. Nxh4 g5
17. Nf3 g4
18. Ng1 Ag6
19. hxg4 Ni4
20. Ai3 Qxi3! WOW! Nice one.
All for the sake of turbulence, sweet turbulence! If 21. Cxi3? Nh2+ forks the Rook on j1.
George Tsavdaris wrote:
21. jxi3 Ae4
22. Bf3 Bxg4
How about giving 22...Bxg4! like it deserves!
George Tsavdaris wrote:
23. Rxj5 Bh6
I liked 23...Nxg3+ personally.
George Tsavdaris wrote:
24. Bxe4 Bxd1
25. Bxd5 Cd8
26. Bf3 Bxf3
27. Nxf3 Cd1+
28. Ke2! Ch1
29. g4 Rg8
30. Kd3! Cf1
31. Nd4 Nxd4
32. exd4 c5
33. d5 Rad8
34. Kc4 Bi7
35. a4 b6
36. a5 Rd7
The black chancellor is positioned perfectly to allow for the knight's safe passage via 36...Nh2 then ...Nf3 next, creeping ever closer to the white king. But that's the human's way of thinking, the machine is out for something completely different.
George Tsavdaris wrote:
37. Rh5 Ng3
38. Rh4 Nf5
39. Rh3 b5+!! Vortex rocks! I never expected this and spent much time on this....
40. Kxc5 Cd1
41. d6 Rc8+
42. Kb4 Rc4+
43. Kb3 Nd4+!
Black has just played a Fischer move!
Vortex was originally looking at 43...Nd4+ 44. cxd4 Rxc1 but just one move later it changed its mind. The program has some serious guts to be playing moves like this without recovering material right away!
George Tsavdaris wrote:
44. cxd4 Cxd4+
45. Ka2 Rc2
46. Ce1 Bxf4
47. Rb1! My head was already one step from exploding since there were many variations and threats i had to deal with.
47...Bxc1
I thought there was at least draw by repetition here with 47...Ca4+ 48. Kb3 49. Cd4+ etc., with check possible with ...Ca4+ no matter what, but your Rook on the 3rd rank can interpose. Trading Bishops was the correct course of action, and this is still a draw at this point.
George Tsavdaris wrote:
48. Rxc1 Ca4+
49. Ra3 Rxb2+
Amazing that there is not some kind of mate here! There must be something?!?
George Tsavdaris wrote:
50. Ka1 Cxa3+
51. Kxb2 Ca4+
52. Kc2 Cd4+
53. Kc3 Cxg4
54. Cd3! f6
So far all of the above moves by white are predicted by Vortex in its principal variation. Personally I would have opted for 54...Cc4+ and a draw since black is still down a pawn at this point, the pawn can be recovered, and the game becomes balanced in short order. This only requires a 7 ply search so this is a mystery to me why Vortex played 54...f6 here instead. Example 54...Cc4+ 55. Kb3 {forced} Cxa5+ and now:
A. 56. Kb2 Ca4+ 57. Kb1 Ki7 and I see no white advantage now that checking chances for white are exhausted while this is not the case for black.
B. 56. Kb4 Ca2+ 57. Kb3 {not 57. Kxb5?? Rb7+ mate in 8!} Ca5+ 58. Kb4 Ca2+ etc. draw, or transposing into line A.
C. 56. Kc3 and now f6! and 57. exf6? loses to ...Ca3+ exchanging chancellors on d3, then ...Rxd6+ and ...Rxf6 picking up the pawn with a stronger position. 57. Cc5 is better and ...Rd8 or ...Ca2+ should draw.
D. 56. Kc2 and black waits with ...Ki7, wanting white to move the chancellor so that ...Ca2+ can be played with ...Cd2 coming (d2 is controlled by the white chancellor on d3 currently.)
George Tsavdaris wrote:
55. exf6 Cxf6
56. Rd1 Ce4+
57. Kc2 a6
58. Cc3 Ce8
More white moves, all predicted by Vortex in every principal variation along the way. Vortex Nuclear needed both the 5-piece tablebases probed in RAM and more time to see 55...Cc4+! 56. Kb3 Rxd6!! and white can just barely draw the pawn ending even though up a full pawn.
Example: 57. Cxc4 Rxd3+ 58. Rc3 Rxc3+ 59. Kxc3 a6!! and now:
60. i4 Kg8 61. Kd4 Kf7 62. Kf7 Ke5
A. 63. i3 loses (the backwards doubled i-pawn) to 63...b4! 64. Kd4 Kxf6 65. Kc4 Ke5 66. Kxb4 Kd4 67. Kb3 Kc5 68. Kc3 Kb5 then ...Kxa5 and the black a-pawn now promotes.
B. 63. Kf5! the only draw! Starting the b-pawn now does not matter: 63...b4 64. Ke4 Kxf6 65. Kd4 Kf5! {65...Kg5 66. Kc4 Kh4 67. Kxb4 Kxi4 68. Kc5 Ki3 69. Kb6 h5!! 70. Kxa6 Kxi2 71. Kb7 h4 72. a6 h3 73. a7 h2 74. a8=Q h1=Q+ 75. Kb8 Qxa8+ 76. Kxa8 and a bare king draw!} 66. Kc4 Ke4 67. Kxb4 Kd5! and now the white king has been "shouldered off" by the black king. 68. Kc3 Kc5 69. Kd3 Kb4 70. Ke4 and it appears white will now head to the other side of the board and promote its i-pawn, but the tablebases again become the dominant factor and say draw! 70...Kxa5 71. Kf5 Kb4 72. Kg6 a5 73. Kxh6 and black is down 2 pawns to 1 but the 5-piece tablebases are unbeatable form here 73...a4 74. i5 a3 75. i6 a2 76. a7 a1=Q 77. i8=Q Qh1+ draw!
Probing the 5-piece tablebases in RAM is the only way to see all of this from move 55!
George Tsavdaris wrote:
59. Cf3! Cc8+
60. Kb1 Ki7
Again both white moves above predicted by Vortex...
George Tsavdaris wrote:
61. Cd4 Cc3+
62. Kb2 Cxi3
63. Rc1!! Cxi2+?! Hmm i don't know if this is actually good or bad.
Now we see some unanticipated play made by George as white. We see white sacrifice a pawn way down on i2 in order to hit the chancellor with the Rook and make strong overtures with the passed d-pawn coming into sharp focus. With the rooks still on the board, the Chancellor + Pawn vs. Chancellor tablebase cannot be probed to offer long distance insight. Black should decline the pawn and play 63...Ci6 to draw more easily.
George Tsavdaris wrote:
64. Rc2 Ci3
65. Rc7 Cg2+
Hidden tactical flares are revealed by the 5-piece tablebases after 65...Rd8 66. Rxh7+?! {tossing away the rook for a pawn} Kxh7 67. Ch4+!! Kg7 68. Cf5+! Kg6 69. Cf4+! Kh6 70. Cf7+ and the Rook will be recovered with Cxd8 next.
George Tsavdaris wrote:
66. Kb3 Cg3+
67. Kb4 Rd8
68. d7! Cg2
69. Kc5 Cg6
69...b4!? is a human way to deal with the issue, offsetting the white chancellor so that after 70. Cxb4?? Ce6+ wins or 70. Kxb4 Ce6 kicks the king out and the pawn on d7 has no monarch guiding it to promotion.
Clearly 69...Cg6 missed the mark in the game but 68...Cg2?? deserves to be tagged as a losing move. The natural 68...Cg7 is almost impossible to resist so Vortex must be put under the microscope to see what ails it.
The 5-piece tablebases are hit hard in this position, and 69. Rc6!! is seen as very strong, leading to a won Rook and pawn ending if 69...Ce5 70. Rxa6 Cxd7 71. Cxd7 Rxd7 72. Rb6 h5 73. a6 and white wins though down a pawn! These tablebases are amazing when probed in RAM!
George Tsavdaris wrote:
70. Cd6 Cf8
Could there be a move more passive that 70...Cf8?? I would think this has to be losing even. Almost anything is better, ...Cg7 waiting then ...b4 if the white king moves, or even the "obvious" ...Ce5+ looks ok at first glance... who wrote this stupid program!
George Tsavdaris wrote:
71. Kb6 Cg8
72. Ra7!! Ce7
More moves for white all predicted by Vortex but easy enough to see. And wy not 71...b4 to at least make some feigning of counterplay? I must have a chat with my program!
George Tsavdaris wrote:
73. Kc7 Rg8
74. Rxa6 Rf8
75. Rb6 Ra8
76. a6 Ra7+
76. Cf6!! and now ...Rxa5?? would be a tragic error since 77. Kb8!! creates an unstoppable promotion.
George Tsavdaris wrote:
77. Rb7 Ra8
78. a7 b4
79. Kb6 Rd8
80. Cc6 Cd5+
81. Ka6 Cf5!! An amazing trap for me by Vortex. If i capture the Rook it will be a repetition draw i think, since i can't avoid the checks. I didn't spend even a second about analyzing the capture since i didn't want to risk anything.
Correct. On 82. Cxd8?? Cc5+ 83. Kb6 Cc4+ 84. Kb5 Ce5+ 85. Kxb4 Ce4+ 86. Kb5 Cc3+87. Kb6 CC4+and the chancellor behind the king has perpetual check.
George Tsavdaris wrote:
82. Rxb4! Simple.... Cf7
Or Rb8! right away, both are winning. The rest of the game is easily won.
George Tsavdaris wrote:
83. Cb6 Cg5
84. Rc4 Ce5
85. Rc8 Cxd7
86. Cxd7 Rxd7
87. a8=Q Rd6+
88. Kb5 Rd3
89. Ri8+ Kh6
90. Qf8+ Kg6
91. Rg8+ Kh5
92. Qf5+ Ki6
93. Qxd3 h6
94. Qf5 h5
95. Rg6+ Ki5
96. Qh3 h4
97. Rg5+ Kh6
98. Qxh4+ Ki6
99. Ri5+ Kj6
100. Qj4#
1-0
Very nice game George. I will be adding my comments to it also. You have to admit it is much more fun to play against this version of Vortex than the older one! Although I still have some code tweaking to do.