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Subject: Re: Endgame position

Author: Robert Hyatt

Date: 19:35:50 03/31/04

Go up one level in this thread


On March 31, 2004 at 11:09:26, Mihaly Szalai wrote:

>From the game Chekhov - Sorokin, Protvino,1988.
>
>[D]5k2/6p1/2p5/2P2PKP/3B4/1b6/1P6/8 w - - 0 52
>
>White is two pawns up but there are opposite color bishops.
>Both 52.f6 and 52.h6 are bad, however 52.Bxg7! wins.
>
>You should show it to your engine, I'm sure that quite a few
>will find it.
>
>Thanks
>Mihaly


Takes Crafty about two seconds on my dual xeon to find the move, about a half a
minute to see a winning score:

               13->   1.24   0.99   1. f6 gxf6+ 2. Kxf6 Kg8 3. h6 Kh7 4.
                                    Be3 Bc2 5. Ke6 Bb3+ 6. Kd6 Bd5 7. Bg5
                                    Kg6 8. Bf4 Kh7 (s=5)
               14     1.51   1.02   1. f6 gxf6+ 2. Kxf6 Kg8 3. h6 Kh7 4.
                                    Be3 Bc2 5. Ke6 Bb3+ 6. Kd6 Bd5 7. Bg5
                                    Be4 8. b4 Bf3 9. Ke6 (s=4)
               14     2.58   1.04   1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kg8
                                    4. Ke5 Kf7 5. h6 Kg6 6. Kd6 Kxf6 7.
                                    Kxc6 Kg6 8. Kd6 Kxh6
               14->   2.58   1.04   1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kg8
                                    4. Ke5 Kf7 5. h6 Kg6 6. Kd6 Kxf6 7.
                                    Kxc6 Kg6 8. Kd6 Kxh6 (s=6)
               15     3.21   1.20   1. Bxg7+ Kxg7 2. f6+ Kf7 3. Kf5 Be6+
                                    4. Ke5 Bd5 5. b4 Bc4 6. h6 Kg6 7. Kd6
                                    Kxh6 8. Kxc6 Kg6 9. f7 Kxf7 10. b5
                                    (s=5)
               15->   5.19   1.20   1. Bxg7+ Kxg7 2. f6+ Kf7 3. Kf5 Be6+
                                    4. Ke5 Bd5 5. b4 Bc4 6. h6 Kg6 7. Kd6
                                    Kxh6 8. Kxc6 Kg6 9. f7 Kxf7 10. b5
                                    (s=6)
               16     5.91   1.33   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Bf7 8. Kxc6 Kg5 9. b5 Kxf6 (s=5)
               16->  10.54   1.33   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Bf7 8. Kxc6 Kg5 9. b5 Kxf6 (s=7)
               17    11.69   1.23   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Kg6 8. f7 Kxf7 9. b5 Kf6 10. bxc6
                                    <HT> (s=6)
               17->  20.15   1.23   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Kg6 8. f7 Kxf7 9. b5 Kf6 10. bxc6
                                    <HT> (s=7)
               18    22.06   1.23   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Kg6 8. f7 Kxf7 9. b5 Kf6 10. bxc6
                                    <HT> (s=6)
               18->  37.11   1.23   1. Bxg7+ Kxg7 2. f6+ Kg8 3. Kf5 Bf7
                                    4. h6 Kh7 5. Ke5 Kxh6 6. Kd6 Bd5 7.
                                    b4 Kg6 8. f7 Kxf7 9. b5 Kf6 10. bxc6
                                    <HT> (s=9)
               19    39.63     +1   1. Bxg7+!!
               19    42.46     +3   1. Bxg7+!!
               19    49.90   2.95   1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kh6
                                    4. Ke5 Kg5 5. Kd6 Kxf6 6. Kxc6 Ke6
                                    7. h6 Bd5+ 8. Kb6 Kf6 9. c6 Be6 10.
                                    Kb7 Bd5 11. b4 Ke5 (s=8)
               19->   1:21   2.95   1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kh6
                                    4. Ke5 Kg5 5. Kd6 Kxf6 6. Kxc6 Ke6
                                    7. h6 Bd5+ 8. Kb6 Kf6 9. c6 Be6 10.
                                    Kb7 Bd5 11. b4 Ke5 (s=7)
               20     1:29   3.33   1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kh6
                                    4. Ke5 Kg5 5. Kd6 Kxf6 6. Kxc6 Ke6
                                    7. h6 Bc2 8. Kb7 Kf6 9. b4 Ke5 10.
                                    c6 Be4 11. b5 <HT> (s=6)



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