Danke, Martin!
Dass einige Festungen auch bald nicht mehr uneinnehmbar sein werden, sieht man besonders schön auch an "dem" Beispiel "der" Behting- Studie:
8/8/7p/3KNN1k/2p4p/8/3P2p1/8 w - - 0 1
Analysis by Stockfish 020716 64 POPCNT:
1.Sg7+ Kg5 2.Sf3+ Kf4 3.Sg1 Kg4 4.Kxc4 h3 5.d3
=/+ (-0.63) Tiefe: 7/9 00:00:00 37kN, tb=47
...
1.Sg7+ Kg5 2.Sf3+ Kf4 3.Sg1 Kg4 4.Se6 h3 5.Sxh3 Kxh3 6.Sf4+ Kg3 7.Sxg2
= (0.00) Tiefe: 13/16 00:00:00 200kN, tb=1472
1.Sg7+ Kg5 2.Sf3+ Kg4 3.Sf5 h3 4.Ke4 g1D 5.Sxh6+ Kh5 6.Sxg1 h2 7.Sf3 h1D 8.Sf5 Db1+ 9.Kf4 Db4 10.S5d4 Kg6 11.Se5+ Kf6 12.Ke4 Db1+ 13.Kd5 Db7+ 14.Sec6 Df7+ 15.Ke4
-+ (-3.40) Tiefe: 14/29 00:00:01 1959kN, tb=14377
...
1.Sg7+ Kg5 2.Sf3+ Kg4 3.Sf5 h3 4.Ke4 g1D 5.Sxg1 h2 6.Sxh6+ Kh5 7.Sf3 h1D 8.Sf5 Kg4 9.S5d4 Db1+ 10.Ke3 Db8 11.Ke4 Db7+ 12.Ke3 De7+ 13.Kf2 Kf4 14.Se2+ Ke4 15.Sc3+ Kd3 16.Kg3 Dd6+ 17.Kg4 Dh6 18.Kf5
-+ (-4.29) Tiefe: 18/39 00:00:03 7056kN, tb=65328
1.Kc6 g1D 2.Sxh4 Da7 3.Shf3 Da5 4.Kd6 Db5 5.Ke6 Dc5 6.Kf5 Dd5 7.Kf4 Db7 8.Kf5 Da6 9.Kf4 De6 10.Ke3 Db6+ 11.Kf4 Da6 12.Kg3 Da4 13.Kf2 Db4
-+ (-3.89) Tiefe: 19/40 00:00:03 7916kN, tb=73004
...
1.Kc6 g1D 2.Sxh4 Da1 3.Shf3 Da5 4.Kd6 Db5 5.Ke6 Dc5 6.Kf5 Dd5 7.Kf4 Db7 8.Kf5 Dc8+ 9.Ke4 Dh3 10.Kd4 Df1 11.Kc5 Dc1 12.Kd5 Dc2 13.Ke6 Db3 14.Kd6 Db7 15.Kc5 De4 16.Kd6 Db1 17.Ke6 Db5 18.Kd6 Da5 19.Kc6 Da2 20.Kd6 Da4 21.Ke6 Da8 22.Kd6 De4 23.Kc5 Dc2 24.Kd6 Db3 25.Kc5 Da4 26.Kd5 Db4 27.Ke6 Db1 28.Kd5 Dc1 29.Ke6 Da1 30.Kd6 Da8 31.Kc5 Dc8+ 32.Kd4 Dc7 33.Kc3
-+ (-3.33) Tiefe: 52/73 00:00:26 339MN, tb=4806179
1.Kc6
-+ (-3.26 ++) Tiefe: 53/73 00:00:30 498MN, tb=6370934
...
1.Kc6
= (-0.10 ++) Tiefe: 53/90 00:02:35 5093MN, tb=34121903
1.Kc6 g1D 2.Sxh4 Da1 3.Shf3 Da5 4.Kd6 Db5 5.Ke6 Dc5 6.Kf5 Dc8+ 7.Ke4 Dd8 8.Ke3 Db6+ 9.Ke4 Dd6 10.Kf5 Dd5 11.Kf4 Db7 12.Kf5 Da8 13.Kf4 Df8+ 14.Ke4 Dd6
= (0.00) Tiefe: 53/90 00:02:59 5842MN, tb=42884004
...
1.Kc6 g1D 2.Sxh4 Da1 3.Shf3 Da5 4.Kd6 Db5 5.Ke6 Dc5 6.Kf5 Dc8+ 7.Ke4 Dd8 8.Ke3 Db6+ 9.Ke4 Dd6 10.Kf5 Dd5 11.Kf4 Db7 12.Kf5 Da8 13.Kf4 Dg8 14.Ke3 Dg2 15.Kd4 c3 16.Kxc3 Dg3 17.d4 Dg2 18.d5 Dh1 19.d6 Dc1+ 20.Kd4 Df4+ 21.Kd3 Db4 22.d7 Db3+ 23.Ke4 Dc2+ 24.Kd4 Da4+ 25.Kc3 Da3+ 26.Kd4 Da4+
= (0.00) Tiefe: 71/90 00:08:58 15062MN, tb=237306586
http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=676876&t=55167