difficult position for Hiarcs

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Andreas Guettinger
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Posts: 27
Joined: Tue Jul 31, 2007 5:07 pm
Location: Bern, Switzerland

difficult position for Hiarcs

Post by Andreas Guettinger »

Hi,

Stumbled about this position in CCC. Strange that Hiarcs 11.2 has problems to find the mate without endgame tablebases in reasonable time compared to other engines.

8/8/8/6k1/3K2p1/8/5R2/8 w - - 0 1
[fen]8/8/8/6k1/3K2p1/8/5R2/8 w - - 0 1[/fen]

13 +1703 58 349127 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
14 +1703 86 539136 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
15 +1703 137 908976 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
16 +1703 206 1422428 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
17 +1703 322 2321607 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
18 +1703 429 3185124 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
19 +1703 581 4453031 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
20 +1703 781 6188340 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
21 +1703 992 8080016 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
22 +1703 1267 10573423 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
23 +1703 1532 13007528 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
24 +1703 1901 16438980 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
25 +1703 2261 19787486 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
26 +1703 2710 23991871 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
27 +1703 3127 27848322 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
28 +1703 3578 32045371 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
29 +1703 4184 37726978 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
30 +1703 4963 44905986 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
31 +1703 5507 49949552 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
32 +1703 6348 57584509 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
33 +1703 7076 64297520 Ke5 g3 Rg2 Kg4 Ke4 Kg5 Rxg3+ Kf6
33 +1707 7086 64394506 Ke4
33 +1707 7277 66528880 Ke4 g3 Rb2 Kg4 Rb6 Kg5 Kf3
34 +1709 11064 107987175 Ke4 g3 Rb2 Kg4 Rb6 Kg5 Kf3 Kf5 Kxg3 Ke4 Rb5 Kd3 Re5 Kd4 Ra5 Kd3 Kf3 Kd4 Kg2 Ke3 Kf1 Kf4 Ke2 Ke4 Ke1 Kf4 Kf1 Ke4 Ke2 Kf4 Kd2 Ke4 Kc3
35 +1709 14875 148141735 Ke4 g3 Rb2 Kg4 Rb6 Kg5 Kf3 Kf5 Kxg3 Ke4 Rb5 Kd3 Re5 Kd4 Ra5 Kc4 Kg2
36 +1709 17994 180267194 Ke4 g3 Rb2 Kg4 Rb6 Kg5 Kf3 Kf5 Kxg3 Ke5 Kf2
37 +1709 23669 236350621 Ke4 g3 Rb2 Kg4 Rb6 Kg5 Kf3 Kf5 Kxg3 Ke5 Kf2 Kf4 Ke2 Ke5 Ke3 Kf5 Rb3 Ke5 Rb1 Kf5 Kd3 Kf6

Analysis by Glaurung 2.0.1:

75.Ke3 Kh4
± (1.05) Depth: 2 00:00:00
75.Ke3 Kh4 76.Kf4
± (1.09) Depth: 3 00:00:00
75.Ke3 Kh4 76.Kf4 g3
± (1.05) Depth: 4 00:00:00
75.Ke3 Kh4 76.Kf4 g3 77.Rf1
± (1.05) Depth: 5 00:00:00
75.Ke3 g3 76.Rf1 Kg4 77.Rh1 g2
± (1.05) Depth: 6 00:00:00 5kN
75.Ke3 g3 76.Rf1 Kg4 77.Rh1 g2 78.Rg1
± (1.05) Depth: 7 00:00:00 11kN
75.Rf7 g3 76.Ke3 Kg4 77.Rh7 g2 78.Kf2
± (1.09) Depth: 7 00:00:00 14kN
75.Rf7 Kg6 76.Rf1 Kg5 77.Ke3 Kh4 78.Kf2 Kg5
± (1.13) Depth: 8 00:00:00 26kN
75.Ke3 Kh4 76.Rf7 Kh3 77.Kf2 Kh4 78.Rh7+ Kg5 79.Kg3
+- (6.29) Depth: 8 00:00:00 28kN
75.Ke3 Kh4 76.Rf7 Kg5 77.Rg7+ Kf5 78.Rg8 g3 79.Rxg3 Ke6
+- (80.36) Depth: 9 00:00:00 38kN
75.Ke3 Kh4 76.Rf7 Kg5 77.Rg7+ Kf5 78.Rg8 g3 79.Rxg3 Ke5 80.Kf3
+- (80.41) Depth: 10 00:00:00 53kN
75.Ke4 Kh4 76.Rf7 Kg3 77.Rg7 Kg2 78.Rxg4+ Kf2 79.Kf4 Ke2 80.Rg7
+- (80.56) Depth: 10 00:00:00 65kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kd7 80.Ke5 Ke7 81.Rg7+ Kd8
+- (80.56) Depth: 11 00:00:00 106kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kd7 80.Ke5 Kc7 81.Rh6 Kd7
+- (80.56) Depth: 12 00:00:00 168kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kd7 80.Ke5 Kc7 81.Rh6 Kd7 82.Kf5
+- (80.56) Depth: 13 00:00:00 306kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kd7 80.Ke5 Kc7 81.Rh6 Kd7 82.Rf6 Ke7
+- (80.56) Depth: 14 00:00:01 562kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kf7 80.Kf5 Ke7 81.Rh6 Kd7 82.Re6 Kc7 83.Ke5
+- (80.61) Depth: 15 00:00:01 1086kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kf7 80.Rd6 Ke7 81.Ke5 Kf7 82.Re6 Kg7 83.Rf6 Kh7
+- (80.66) Depth: 16 00:00:02 1833kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kf7 80.Rd6 Ke7 81.Ke5 Kf7 82.Re6 Kg7 83.Rf6 Kh8 84.Ke6
+- (80.71) Depth: 17 00:00:03 2812kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kf7 80.Rd6 Ke7 81.Ke5 Kf7 82.Rd7+ Kg6 83.Ra7 Kg5 84.Rg7+ Kh4 85.Kf5 Kh3
+- (80.71) Depth: 18 00:00:04 4271kN
75.Ke4 g3 76.Rf7 g2 77.Rg7+ Kf6 78.Rxg2 Ke6 79.Rg6+ Kf7 80.Rd6 Ke7 81.Ke5 Kf7 82.Re6 Kg7 83.Ke4 Kh8 84.Rg6 Kh7 85.Kf5
+- (80.75) Depth: 19 00:00:06 6535kN
75.Ke4 g3 76.Rg2 Kg4 77.Rg1 Kg5 78.Rxg3+ Kf6 79.Rd3 Ke6 80.Rd5 Kf7 81.Ke5 Ke7 82.Kf5 Kf7 83.Rd7+ Kf8 84.Kf6 Kg8 85.Rf7 Kh8
+- (80.80) Depth: 20 00:00:09 9442kN
75.Ke4 g3 76.Rg2 Kg4 77.Rg1 Kg5 78.Rxg3+ Kf6 79.Kd5 Ke7 80.Ke5 Kf7 81.Rc3 Ke7 82.Rc7+ Ke8 83.Ke6 Kf8 84.Rc3 Kg7 85.Rg3+ Kh7 86.Kf6 Kh8
+- (80.80) Depth: 21 00:00:11 12559kN
75.Ke4 g3 76.Rg2 Kg4 77.Rg1 Kg5 78.Rxg3+ Kf6 79.Kd5 Ke7 80.Ke5 Kf7 81.Rc3 Ke7 82.Rc7+ Kd8 83.Kd6 Ke8 84.Ke6 Kf8 85.Rf7+ Kg8 86.Kf6 Kh8 87.Re7
+- (80.80) Depth: 22 00:00:15 17113kN
75.Ke4 g3 76.Rf8 g2 77.Rg8+ Kf6 78.Rxg2 Ke6 79.Rd2 Kf6 80.Rd6+ Ke7 81.Ke5 Kf7 82.Kf5 Ke7 83.Rd5 Kf7 84.Re5 Kg7 85.Re7+ Kf8 86.Kf6 Kg8 87.Re8+ Kh7 88.Ra8 Kh6 89.Rh8#
+- (#15) Depth: 23 00:00:20 22825kN
75.Ke4 g3 76.Rf8 g2 77.Rg8+ Kf6 78.Rxg2 Ke6 79.Rd2 Kf6 80.Rd6+ Ke7 81.Ke5 Kf7 82.Kf5 Ke7 83.Rd5 Kf7 84.Re5 Kg7 85.Re7+ Kf8 86.Kf6 Kg8 87.Re8+ Kh7 88.Ra8 Kh6 89.Rh8#
+- (#15) Depth: 24 00:00:22 26280kN
75.Ke4 g3 76.Rf8 g2 77.Rg8+ Kf6 78.Rxg2 Ke6 79.Rd2 Kf6 80.Rd6+ Ke7 81.Ke5 Kf7 82.Kf5 Ke7 83.Rd5 Kf7 84.Re5 Kg7 85.Re7+ Kf8 86.Kf6 Kg8 87.Re8+ Kh7 88.Ra8 Kh6 89.Rh8#
+- (#15) Depth: 25 00:00:26 31428kN
75.Ke4 g3 76.Rg2 Kg4 77.Rg1 Kg5 78.Rxg3+ Kf6 79.Rd3 Ke6 80.Kf4 Kf6 81.Re3 Kg6 82.Re6+ Kg7 83.Kg5 Kf7 84.Re3 Kg7 85.Rf3 Kh7 86.Kf6 Kh8 87.Kf7 Kh7 88.Rh3#
+- (#14) Depth: 26 00:00:31 38336kN
75.Ke4 g3 76.Rg2 Kg4 77.Rg1 Kg5 78.Rxg3+ Kf6 79.Rd3 Ke6 80.Kf4 Kf6 81.Re3 Kg6 82.Re6+ Kg7 83.Kg5 Kf7 84.Re3 Kg7 85.Rf3 Kh7 86.Kf6 Kh8 87.Kf7 Kh7 88.Rh3#

Crafty 21.6:

Code: Select all

 
               12     0.37   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kd7 7.
                                    Kf5 Ke7 8. Re6+ Kd7 (s=8)
               12->   0.51   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kd7 7.
                                    Kf5 Ke7 8. Re6+ Kd7 (s=9)
               13     0.58   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kf7 7.
                                    Rh6 Ke7 8. Kf5 Kd7 (s=8)
               13->   0.73   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kf7 7.
                                    Rh6 Ke7 8. Kf5 Kd7 (s=9)
               14     0.75   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kf7 7.
                                    Rh6 Ke7 8. Ke5 Kd7 9. Rh7+ Kc6 (s=8)
               14->   0.94   7.57   1. Ke4 g3 2. Rf5+ Kg4 3. Rf8 Kg5 4.
                                    Rg8+ Kf6 5. Rxg3 Ke6 6. Rg6+ Kf7 7.
                                    Rh6 Ke7 8. Ke5 Kd7 9. Rh7+ Kc6 (s=9)
               15     1.04   7.67   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kd5 Kf5 6. Rf3+ Kg4 7.
                                    Ke4 Kg5 8. Rf4 Kh5 9. Kf5 (s=8)
               15->   1.27   7.67   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kd5 Kf5 6. Rf3+ Kg4 7.
                                    Ke4 Kg5 8. Rf4 Kh5 9. Kf5 (s=5)
               16     1.41   7.77   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kd5 Kf7 6. Rf3+ Ke7 7.
                                    Rf5 Kd7 8. Rf7+ Ke8 9. Rg7 Kf8 10.
                                    Rh7 (s=4)
               16->   1.68   7.77   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kd5 Kf7 6. Rf3+ Ke7 7.
                                    Rf5 Kd7 8. Rf7+ Ke8 9. Rg7 Kf8 10.
                                    Rh7 (s=4)
               17     1.80   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rg6+
                                    Kd7 8. Ke5 Kc7 9. Rd6 Kb7 10. Kd5 Kc7
                                    11. Ke6 <HT> &#40;s=3&#41;
               17->   2.15   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rg6+
                                    Kd7 8. Ke5 Kc7 9. Rd6 Kb7 10. Kd5 Kc7
                                    11. Ke6 <HT> &#40;s=4&#41;
               18     2.29   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rg6+
                                    Kd7 8. Ke5 Kc7 9. Rd6 Kb7 10. Kd5 Kc7
                                    11. Ke6 <HT> &#40;s=3&#41;
               18->   2.69   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rg6+
                                    Kd7 8. Ke5 Kc7 9. Rd6 Kb7 10. Kd5 Kc7
                                    11. Ke6 <HT> &#40;s=6&#41;
               19     2.94   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 <HT>
                                    &#40;s=5&#41;
               19->   3.46   7.87   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 <HT>
                                    &#40;s=4&#41;
               20     3.82   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=3&#41;
               20->   4.44   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=4&#41;
               21     4.78   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=3&#41;
               21->   5.54   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=4&#41;
               22     6.01   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=3&#41;
               22->   7.00   8.07   1. Ke4 g3 2. Rf5+ Kg4 3. Rf4+ Kg5 4.
                                    Rf8 g2 5. Rg8+ Kf6 6. Rxg2 Ke6 7. Rd2
                                    Kf6 8. Rd6+ Kg5 9. Re6 Kg4 10. Rg6+
                                    Kh4 11. Kf5 Kh5 12. Rg8 <HT> &#40;s=4&#41;
               23     7.53     +1   1. Ke4!!   &#40;5.7Mnps&#41;             
               23     8.00     +3   1. Ke4!!   &#40;5.7Mnps&#41;             
               23     8.47     +M   1. Ke4!!   &#40;5.8Mnps&#41;             
               23    10.23  Mat14   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kf4 <HT> &#40;s=3&#41;
               23->  11.46  Mat14   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kf4 <HT>
               24    12.48  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kf4 Ke7 6. Rd3 Ke6 7.
                                    Rd4 Kf6 8. Re4 Kg6 9. Re6+ Kf7 10.
                                    Kf5 <HT>
               24->  14.89  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Kf4 Ke7 6. Rd3 Ke6 7.
                                    Rd4 Kf6 8. Re4 Kg6 9. Re6+ Kf7 10.
                                    Kf5 <HT> &#40;s=3&#41;
               25    15.57  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Re7+ Kf8 12. Kf6 Kg8 13.
                                    Re8+ Kh7 14. Rf8 Kh6 15. Rh8# &#40;s=2&#41;
               25->  17.76  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Re7+ Kf8 12. Kf6 Kg8 13.
                                    Re8+ Kh7 14. Rf8 Kh6 15. Rh8# &#40;s=3&#41;
               26    18.62  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Re7+ Kf8 12. Kf6 Kg8 13.
                                    Re8+ Kh7 14. Rf8 Kh6 15. Rh8# &#40;s=2&#41;
               26->  21.35  Mat15   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Re7+ Kf8 12. Kf6 Kg8 13.
                                    Re8+ Kh7 14. Rf8 Kh6 15. Rh8# &#40;s=3&#41;
               27    22.56  Mat14   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Rf5 Kh7 12. Kf6 Kh8 13.
                                    Kf7 Kh7 14. Rh5# &#40;s=2&#41;
               27->  25.53  Mat14   1. Ke4 g3 2. Rg2 Kg4 3. Rg1 Kg5 4.
                                    Rxg3+ Kf6 5. Rd3 Ke6 6. Kf4 Kf6 7.
                                    Re3 Kg6 8. Re6+ Kg7 9. Kg5 Kf7 10.
                                    Re5 Kg7 11. Rf5 Kh7 12. Kf6 Kh8 13.
                                    Kf7 Kh7 14. Rh5# &#40;s=3&#41;

regards,
Andy
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