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Subject: Re: Interesting sacrifice from correspondence game

Author: Pete Galati

Date: 16:12:55 03/02/00

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On March 02, 2000 at 10:11:50, Shep wrote:

>
>This is from a correspondence game I played last year.
>14...Nxf2 is the amazing novelty my opponent found.
>This position is going to be part of my upcoming Shep 2000 test suite
>to be released next month.
>
>1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O Qc7 7. Qe2 d6 8. c4
>g6 9. Rd1 Bg7 10. Nf3 O-O 11. Nc3 Nbd7 12. Bc2 Ng4 13. Bf4 Nde5 14. Nd2 (14.
>Nd2 b5 15. h3 Nf6 16. cxb5 axb5 17. Bb3 b4 18. Nb5 Qb8 19. Nxd6 Nh5 20. Bxe5
>Bxe5 21. N2c4 Ba6 22. Qf3 {1-0 Cabrilo,G-Kovacevic,V/Vrnjacka Banja 1988 (33)})
>(14. Nxe5 Nxe5 15. Bb3 (15. Rac1 b6 16. b3 Rd8 17. Bb1 Rb8 18. Be3 Qe7 19. Na4
>Nd7 20. b4 b5 21. cxb5 axb5 22. Nc3 {
>1-0 Schaefer,M-Bluhm,G/BL2-W 8889 1989/BL2 (38)}) 15... b6 16. Rac1 Bb7 17. f3
>Rac8 18. Qd2 Rfd8 19. Bg5 Rd7 20. Qf2 h6 21. Be3 Nxc4 22. Na4 {
>1-0 Hawelko,M-Hulak,K/Berlijn open 1988 (39)}) 14... Nxf2 $3 $146 {  Junior 6.
>0: 0:55, +0,35  Deep Junior 6.0a: 0:59, +0,32  Nimzo 7.32: 6:00, +0,40  Hiarcs
>7.32: 8:19, +0,06  Fritz 6.0a: >10:00  } 15. Qxf2 (15. Kxf2 Qb6+ 16. c5 Qxb2
>17. Nb3 (17. cxd6 Qxc3 18. Nb3 Bd7 {transposition}) 17... Qxc3 18. cxd6 Bd7 $19
>) 15... Ng4 16. Qe2 Qb6+ 17. Kf1 (17. c5 Qxb2 18. Rac1 Qxc3 19. Nb3 (19. cxd6
>e5 $19) (19. Bxd6 $4 Bd4+ $19) 19... dxc5 $17) 17... Qxb2 18. Bxd6 Qxc3 (18...
>Rd8 19. e5 Qxc2 20. Qxg4 Qxc3 $17) 19. Qxg4 {White resigns} 0-1
>
>Critical position:
>[D]r1b2rk1/1pq2pbp/p2pp1p1/4n3/2P1PBn1/2N5/PPBNQPPP/R2R2K1 b - - 0 14; bm Nxf2;
>id Shep 2000.01
>
>14...Nxf2!!
>
>The results from the programs I tested (PIII-550):
>
>Junior 6.0:       0:55, +0,35
>Deep Junior 6.0a: 0:59, +0,32
>Nimzo 7.32:       6:00, +0,40
>Hiarcs 7.32:      8:19, +0,06
>Fritz 6.0a:     >10:00
>
>---
>Shep

Keep in mind this is on my slow 90mhz machine, but I could not get Crafty to
find Nxf2 in analyze mode, so I fed it the move and annotated the game (cut
short at 14. ...Nxf2) and also below is the game log.

Pete

[Event "Game from non-PGN file"]
[Site "DEFAULT"]
[Date "2000.03.02"]
[Round "-"]
[White "?"]
[WhiteElo ""]
[Black "?"]
[BlackElo ""]
[Result "*"]
[Annotator "Crafty v17.8"]
{annotating only black moves.}
{using a scoring margin of -1.00 pawns.}
{search time limit is 15:00}

  1.      e4      c5
  2.     Nf3      e6
  3.      d4    cxd4
  4.    Nxd4      a6
  5.     Bd3     Nf6
  6.     O-O     Qc7
  7.     Qe2      d6
  8.      c4      g6
  9.     Rd1     Bg7
 10.     Nf3     O-O
 11.     Nc3    Nbd7
 12.     Bc2     Ng4
 13.     Bf4    Nde5
 14.     Nd2    Nxf2
                ({10:-1.48}  14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+ 17. Kf1 Qxb2
18. Qxg4 Qxc2 19. Rac1 Qd3+ 20. Ne2 $16) White has a moderate advantage
                ({10:-0.09}  14. ... Bd7 15. h3 Nf6 16. Rac1 Rac8 17. Bxe5 dxe5
18. Ba4 Bxa4 19. Nxa4 Rfd8 20. Qf3 $10) drawish position

       *

White(1): info
Crafty version 17.8
hash table memory =        12M bytes.
pawn hash table memory =    1M bytes.
EGTB cache memory =         1M bytes.
60 moves/30 minutes 0 seconds primary time control
30 moves/15 minutes 0 seconds secondary time control
frequency (freq)..............1.00
static evaluation (eval)......0.10
learning (learn)..............0.30
CAP (CAP score)...............1.00
White(1): annotate
White(1): annotate shep2.pgn b 14 -1 900"
White(1): e4
Black(1): c5
White(2): Nf3
Black(2): e6
White(3): d4
Black(3): cxd4
White(4): Nxd4
Black(4): a6
White(5): Bd3
Black(5): Nf6
White(6): O-O
Black(6): Qc7
White(7): Qe2
Black(7): d6
White(8): c4
Black(8): g6
White(9): Rd1
Black(9): Bg7
White(10): Nf3
Black(10): O-O
White(11): Nc3
Black(11): Nbd7
White(12): Bc2
Black(12): Ng4
White(13): Bf4
Black(13): Nde5
White(14): Nd2
Black(14): Nxf2

              Searching all legal moves.----------------------------------
middle-game phase
              clearing hash tables
              time surplus   0.00  time limit 15:00 (15:00)
         nss  depth   time  score   variation (1)
                6     6.94  -0.13   14. ... Bd7 15. h3 Nf6 16. Qe3 b5 17.
                                    Qe2
                6->   9.87  -0.13   14. ... Bd7 15. h3 Nf6 16. Qe3 b5 17.
                                    Qe2
                7    13.23  -0.14   14. ... Bd7 15. h3 Nf6 16. Bb3 Rac8
                                    17. Bxe5 dxe5 18. Qf3
                7->  24.16  -0.14   14. ... Bd7 15. h3 Nf6 16. Bb3 Rac8
                                    17. Bxe5 dxe5 18. Qf3
                8    29.78  -0.20   14. ... Bd7 15. h3 Nf6 16. Qe3 Rac8
                                    17. Bh6 Qc5 18. Qf4
                8     1:05  -0.18   14. ... b6 15. h3 Nf6 16. Bb3 Nh5 17.
                                    Bg5 f6 18. Be3
                8->   1:26  -0.18   14. ... b6 15. h3 Nf6 16. Bb3 Nh5 17.
                                    Bg5 f6 18. Be3
                9     2:26  -0.10   14. ... b6 15. h3 Nf6 16. Bb3 Nfd7
                                    17. Nf3 Nxf3+ 18. Qxf3 Ne5 19. Bxe5
                                    Bxe5 20. Rac1
                9->   3:09  -0.10   14. ... b6 15. h3 Nf6 16. Bb3 Nfd7
                                    17. Nf3 Nxf3+ 18. Qxf3 Ne5 19. Bxe5
                                    Bxe5 20. Rac1
               10     7:58  -0.16   14. ... b6 15. a4 Bb7 16. h3 Nf6 17.
                                    Bxe5 dxe5 18. a5 bxa5 19. Nb3 Rad8
                                    20. Rxa5 Rxd1+ 21. Bxd1
               10    13:12  -0.09   14. ... Bd7 15. h3 Nf6 16. Rac1 Rac8
                                    17. Bxe5 dxe5 18. Ba4 Bxa4 19. Nxa4
                                    Rfd8 20. Qf3
               10->  14:51  -0.09   14. ... Bd7 15. h3 Nf6 16. Rac1 Rac8
                                    17. Bxe5 dxe5 18. Ba4 Bxa4 19. Nxa4
                                    Rfd8 20. Qf3
              time=15:00  cpu=99%  mat=0  n=17442904  fh=91%  nps=19360
              ext-> checks=131762 recaps=53155 pawns=1072 1rep=5267 thrt:21
              predicted=0  nodes=17442904  evals=5142155
              endgame tablebase-> probes done=0  successful=0

              Searching only the move played in game.--------------------
              time surplus   0.00  time limit 45:00 (45:00)
         nss  depth   time  score   variation (1)
                8     9.75  -1.82   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. c5 Bd4+ 18. Kf1 Qxb2 19. Qxg4 Qxc2
                8->   9.77  -1.82   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. c5 Bd4+ 18. Kf1 Qxb2 19. Qxg4 Qxc2
                9    25.71  -1.65   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. Kf1 Qxb2 18. Qxg4 Qxc2 19. Rac1
                9->  25.73  -1.65   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. Kf1 Qxb2 18. Qxg4 Qxc2 19. Rac1
               10    56.80  -1.48   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. Kf1 Qxb2 18. Qxg4 Qxc2 19. Rac1
                                    Qd3+ 20. Ne2
               10->  56.83  -1.48   14. ... Nxf2 15. Qxf2 Ng4 16. Qf3 Qb6+
                                    17. Kf1 Qxb2 18. Qxg4 Qxc2 19. Rac1
                                    Qd3+ 20. Ne2
              time=56.84  cpu=99%  mat=0  n=1346787  fh=91%  nps=23694
              ext-> checks=11364 recaps=3775 pawns=261 1rep=1114 thrt:0
              predicted=0  nodes=1346787  evals=216634
              endgame tablebase-> probes done=0  successful=0
White(15): q
execution complete.







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