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Subject: Nunn Rook ending quiz

Author: Sune Larsson

Date: 11:33:48 10/05/02



 [D]8/1pp2kp1/p6p/8/5PP1/1P6/P2rRK1P/8 b - - 0 6

 This is a position from the Nunn1 tourney. Black has played an active game
 and very early got rid of his double pawn. Can you imagine any top program
 losing this position with the black pieces? And this in just another 11 moves..
 "Anything" draws here - keeping the rook or moving into a pawn ending.
 Black chose to swap rooks. 40 moves in 1 hour.


 Quiz: ShredderPB was playing white but what wellknown program misplayed the
       position so much as to lose it in another 11 moves?


 Clue1: It was not a German program.

 Clue2: The author's first name begins with
        the same letter as the program.


 The whole game below - with "Program X" as black ;-)


[Event "Nunn1 40/60'"]
[Site "Kil"]
[Date "2002.09.23"]
[Round "2"]
[White "Shredder Paderborn"]
[Black "Program X"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/1ppr1kp1/p1p4p/8/8/5P2/PPP1RKPP/8 w - - 0 1"]
[PlyCount "33"]
[EventDate "2002.??.??"]

{W=17.9 ply; 238kN/s; 881 465 TBAs
B=16.8 ply; 399kN/s; 204 542 TBAs
} 1. f4
{0.23/14 95} 1... c5 {0.28/14 113} 2. g4 {(h4) 0.29/14 90} 2... Rd1 {
(c4) 0.19/14 155} 3. b3 {(Kf3) 0.19/13 108} 3... c4 {0.06/14 247} 4. Re4 {
(h4) 0.02/13 133} 4... cxb3 {-0.09/13 71} 5. cxb3 {-0.07/15 105} 5... Rd2+ {
(b5) -0.09/13 163} 6. Re2 {0.06/13 7} 6... Rxe2+ {(Rd3) -0.19/15 118} 7. Kxe2 {
0.24/14 6} 7... Ke6 {(b5) -0.28/14 70} 8. Ke3 {(h4) 0.23/18 143} 8... Kd5 {
(c5) -0.19/14 79} 9. h4 {0.16/18 115} 9... g6 {0.09/15 73} (9... c5) 10. b4 {
0.16/18 126} 10... b6 {0.09/16 100} 11. a3 {(Kd3) 0.22/18 134} 11... c6 $2 {
(Ke6) 0.03/16 79} (11... c5 $1 12. bxc5 bxc5 $11) 12. a4 {0.33/18 76} 12... c5
{(a5) 1.56/18 261} 13. bxc5 {0.01/20 399} 13... Kxc5 {(bxc5) 1.97/19 297} 14.
f5 {3.93/19 89} 14... g5 {8.50/20 276} 15. hxg5 {7.56/20 77} 15... hxg5 {
8.94/21 119} 16. Ke4 {11.80/21 77} 16... Kd6 {9.00/19 42} 17. Kd4 {11.97/21 159
} 1-0


/s









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