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Subject: Re: perpetual check

Author: John Merlino

Date: 08:13:38 10/16/01

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On October 16, 2001 at 07:58:15, Steffen Jakob wrote:

>Hi,
>
>this is a position from a blitz game Hossa - Sjeng:
>
>[D]7k/4QP2/7p/6rP/8/1K6/6r1/8 b
>
>For a human it's obvious that this is a draw. Hossa was rather clueless and
>thought that white was winning. Are there any engines which show a draw value at
>once (without significant search depth)?
>
>Greetings,
>Steffen.

Chessmaster 8000 sees the draw in less than a second:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.18	7319		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3
0:00	2/4	0.95	23824		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2
0:00	3/5	0.00	45109		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3
0:01	4/6	0.00	110883		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3
0:02	5/7	0.00	246089		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3
0:04	6/8	0.00	498686		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3
0:08	7/9	0.00	1039196		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3
0:16	8/10	0.00	2092486		1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+
					4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2
					Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9.
					Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1
					Rg1+ 12. Kf2 R1g2+ 13. Ke3

jm

• Re: perpetual check Robert Hyatt 11:24:00 10/16/01
  • Re: perpetual check Vincent Diepeveen 14:57:19 10/17/01
    • Re: perpetual check Robert Hyatt 05:56:05 10/18/01
  • Re: perpetual check Uri Blass 13:02:42 10/16/01
    • Re: perpetual check John Merlino 14:50:12 10/16/01
    • Re: perpetual check Robert Hyatt 14:05:01 10/16/01
    • Re: perpetual check Miguel A. Ballicora 13:39:07 10/16/01
      • Re: perpetual check Robert Hyatt 14:10:39 10/16/01
        • Re: perpetual check Robert Hyatt 14:58:56 10/16/01
          • Re: perpetual check Dan Andersson 16:27:56 10/16/01
            • Re: perpetual check Robert Hyatt 19:18:12 10/16/01
              • Re: perpetual check Peter Fendrich 02:03:19 10/17/01
                • Re: perpetual check Robert Hyatt 08:29:43 10/17/01

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