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Subject: Re: Check is in the Mail -- test position

Author: Rob Basham

Date: 13:07:12 04/13/05

Go up one level in this thread


On April 13, 2005 at 00:04:55, Mike Byrne wrote:

>Source: Chess Life
>"Check is in the Mail"  column by FIDE Naster Alx Dunne
>Position is from the Game IM Keith Rodriguez vs Pedro Alzola Tovar
>Tournament "30 years of CC in Cuba 2002"
>
>Crafty v19.20 (2 cpus)
>
>White(1): [d]r4rk1/4bp1p/p2p1R2/P3p1B1/2q1P3/1Np4Q/1P5P/R6K w - - 0 25
>White(1): d
>
>       +---+---+---+---+---+---+---+---+
>    8  |<R>| . |   | . |   |<R>|<K>| . |
>       +---+---+---+---+---+---+---+---+
>    7  | . |   | . |   |<B>|<P>| . |<P>|
>       +---+---+---+---+---+---+---+---+
>    6  |<P>| . |   |<P>|   |-R-|   | . |
>       +---+---+---+---+---+---+---+---+
>    5  |-P-|   | . |   |<P>|   |-B-|   |
>       +---+---+---+---+---+---+---+---+
>    4  |   | . |<Q>| . |-P-| . |   | . |
>       +---+---+---+---+---+---+---+---+
>    3  | . |-N-|<P>|   | . |   | . |-Q-|
>       +---+---+---+---+---+---+---+---+
>    2  |   |-P-|   | . |   | . |   |-P-|
>       +---+---+---+---+---+---+---+---+
>    1  |-R-|   | . |   | . |   | . |-K-|
>       +---+---+---+---+---+---+---+---+
>         a   b   c   d   e   f   g   h
>
>White(1): g
>              clearing hash tables
>              time surplus   0.00  time limit 10:00 (10:00)
>              depth   time  score   variation (1)
>starting thread 1
>                6     0.05   1.80   1. Rg1 Qxe4+ 2. Qf3 Qxf3+ 3. Rxf3 Bxg5
>                                    4. Rxg5+ Kh8 5. Rxc3 Rac8 6. Kg2 Rxc3
>                                    7. bxc3
>                6->   0.10   1.80   1. Rg1 Qxe4+ 2. Qf3 Qxf3+ 3. Rxf3 Bxg5
>                                    4. Rxg5+ Kh8 5. Rxc3 Rac8 6. Kg2 Rxc3
>                                    7. bxc3
>                7     0.13   1.65   1. Rg1 Qxe4+ 2. Qf3 Qxf3+ 3. Rxf3 Bxg5
>                                    4. Rxg5+ Kh8 5. Rxc3 Rae8 6. Rc7 f5
>                7     0.36   1.86   1. Qf5 Bxf6 2. Rg1 Bg7 3. Bf6 Rfe8
>                                    4. Rxg7+ Kf8
>                7->   0.36   1.86   1. Qf5 Bxf6 2. Rg1 Bg7 3. Bf6 Rfe8
>                                    4. Rxg7+ Kf8
>                8     0.53     +1   1. Qf5!!
>                8     0.69   2.70   1. Qf5 Bxf6 2. Rg1 Bg7 3. Bh6 Rfd8
>                                    4. Rxg7+ Kf8 5. Rxf7+ Ke8
>                8->   0.89   2.70   1. Qf5 Bxf6 2. Rg1 Bg7 3. Bh6 Rfd8
>                                    4. Rxg7+ Kf8 5. Rxf7+ Ke8
>                9     1.35     +1   1. Qf5!!
>                9     1.91   3.14   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rfxg5+ Kh8 5. bxc3 Rab8 6. Nd2 Rb2
>                9->   2.25   3.14   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rfxg5+ Kh8 5. bxc3 Rab8 6. Nd2 Rb2
>               10     2.85   3.20   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rfxg5+ Kh8 5. bxc3 Rab8 6. Nc1 Rg8
>                                    7. Nd3 Rxg5 8. Rxg5
>               10->   4.61   3.20   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rfxg5+ Kh8 5. bxc3 Rab8 6. Nc1 Rg8
>                                    7. Nd3 Rxg5 8. Rxg5 (s=4)
>               11     5.64   3.08   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rgxg5+ Kh8 5. bxc3 Rab8 6. Nd2 h6
>                                    7. Rg4 Rb2 (s=3)
>               11->  14.20   3.08   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rgxg5+ Kh8 5. bxc3 Rab8 6. Nd2 h6
>                                    7. Rg4 Rb2 (s=9)
>               12    16.74   3.25   1. Qf5 Qc8 2. Rg1 Qxf5 3. Rxf5 Bxg5
>                                    4. Rgxg5+ Kh8 5. bxc3 Rab8 6. Nd2 Rg8
>                                    7. Rxg8+ Kxg8 8. Nc4 Rd8 (s=8)
>s              12    18.19   5/48*  1. Nc5
>White(1): s
>usage:  smpgroup <threads>
>d
>White(1): d
>
>       +---+---+---+---+---+---+---+---+
>    8  |<R>| . |   | . |   |<R>|<K>| . |
>       +---+---+---+---+---+---+---+---+
>    7  | . |   | . |   |<B>|<P>| . |<P>|
>       +---+---+---+---+---+---+---+---+
>    6  |<P>| . |   |<P>|   |-R-|   | . |
>       +---+---+---+---+---+---+---+---+
>    5  |-P-|   | . |   |<P>|   |-B-|   |
>       +---+---+---+---+---+---+---+---+
>    4  |   | . |<Q>| . |-P-| . |   | . |
>       +---+---+---+---+---+---+---+---+
>    3  | . |-N-|<P>|   | . |   | . |-Q-|
>       +---+---+---+---+---+---+---+---+
>    2  |   |-P-|   | . |   | . |   |-P-|
>       +---+---+---+---+---+---+---+---+
>    1  |-R-|   | . |   | . |   | . |-K-|
>       +---+---+---+---+---+---+---+---+
>         a   b   c   d   e   f   g   h
>
>               12    38.49     +1   1. Nc5!!
>               12    45.60   3.84   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Qxh7+ Kd6 9. Rf6+ Qe6
>                                    10. Rxe6+ Kxe6 11. bxc3 (s=4)
>               12->  51.52   3.84   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Qxh7+ Kd6 9. Rf6+ Qe6
>                                    10. Rxe6+ Kxe6 11. bxc3 (s=2)
>               13     1:02     +1   1. Nc5!!
>               13     1:11   4.39   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Qxh7+ Kd6 9. Rf6+ Qe6
>                                    10. Rxe6+ Kxe6 11. Qf5+ Kd6 12. bxc3
>               13->   1:27   4.39   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Qxh7+ Kd6 9. Rf6+ Qe6
>                                    10. Rxe6+ Kxe6 11. Qf5+ Kd6 12. bxc3
>                                    (s=2)
>               14     1:57     +1   1. Nc5!!
>               14     2:48   5.68   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Bg5+ Kd6 9. Rf6+ Kc7
>                                    10. Qxe5+ Kb7 11. Qe7+ Rd7 12. Qxd7+
>                                    Kb8
>               14->   3:35   5.68   1. Nc5 dxc5 2. Qf5 Bxf6 3. Rg1 Bg7
>                                    4. Bh6 Rfd8 5. Rxg7+ Kf8 6. Rxf7+ Ke8
>                                    7. Rf8+ Ke7 8. Bg5+ Kd6 9. Rf6+ Kc7
>                                    10. Qxe5+ Kb7 11. Qe7+ Rd7 12. Qxd7+
>                                    Kb8 (s=2)
>?              15     3:35   1/48*  1. Nc5
>White(1): ?
>              time=3:37  cpu=197%  mat=1  n=811429002  fh=90%  nps=3.73M
>              ext-> chk=54325921 cap=1879676 pp=2759912 1rep=7660528 mate=564672
>
>              predicted=0  nodes=811429002  evals=200343906  50move=0
>              endgame tablebase-> probes=0  hits=0
>              SMP->  split=1704  stop=279  data=7/64  cpu=7:09  elap=3:37
>
>White(1): Nc5
>              time used:   3:37
>Black(1):

Thanks Mike....

Excellent test move...!!
One of the best I have seen!

Polgar CM-9000....takes 57 seconds...

and Fritz 8..............93 seconds to find Nc5....etc.

P3-850

regards
Rob



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