First, there could be a fault in my implementation. It was the first try.Steve Maughan wrote:This may be a stupid question but where is the mate in 11 in the search? The key move is Qg2+ and the tree seems to focus on Qxf2. I cannot see the mating line in the tree.

Second, the search is lacking in the area of PV reporting.

Third, the program thinks the key move (or at least one key move) is 1... Qxf2+.

Fourth, here's the list of successful mate threats as taken directly from a recent log (uh, I hope you have a wide screen monitor):

Code: Select all

```
2007.05.01 20:19:27.349 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Kd2 Rd3+ Kc2 Rh2+ Kb1 Rd1#)
2007.05.01 20:19:27.694 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Kd2 Rd3+ Kc2 Rh2+ Kc1 Rd1#)
2007.05.01 20:19:30.037 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Ra3+ Kd2 e3+ Kc2 Bf5#)
2007.05.01 20:19:33.608 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf1#)
2007.05.01 20:19:34.961 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Re3+ Kc1 Re1#)
2007.05.01 20:19:36.961 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rd3+ Kc1 Rd1#)
2007.05.01 20:19:42.225 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rxg3+ Kd2 Rh2+ Kc1 Rg1#)
2007.05.01 20:19:42.511 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rxg3+ Kd2 Rh2+ Ke1 Rg1#)
2007.05.01 20:19:46.985 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf4+ Kc1 Rf1#)
2007.05.01 20:19:47.613 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf4+ Ke1 Re2+ Kd1 Rf1#)
2007.05.01 20:19:50.426 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf5+ Kc1 Rf1#)
2007.05.01 20:19:51.082 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf5+ Ke1 Re2+ Kd1 Rf1#)
2007.05.01 20:19:53.643 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf6+ Kc1 Rf1#)
2007.05.01 20:19:54.336 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf6+ Ke1 Re2+ Kd1 Rf1#)
2007.05.01 20:20:01.354 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf7+ Kc1 Rf1#)
2007.05.01 20:20:02.128 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf7+ Ke1 Re2+ Kd1 Rf1#)
2007.05.01 20:20:06.188 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf8+ Kc1 Rf1#)
2007.05.01 20:20:06.998 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Nf5 Rxf5+ Qf3 Rxf3+ Ke1 h1=R+ Ke2 Rh2+ Kd1 Rf8+ Ke1 Re2+ Kd1 Rf1#)
2007.05.01 20:20:21.214 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc1 Rf1+ Qd1 Qxd1#)
2007.05.01 20:20:21.698 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc1 Rf1+ Qd1 Rxd1#)
2007.05.01 20:20:40.942 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qf2+ Kc1 Qe1+ Qd1 Qxd1#)
2007.05.01 20:20:41.501 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qf2+ Kc1 Qe1+ Kc2 Rf2#)
2007.05.01 20:20:46.620 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc3 Rf3+ Kb4 Qb5+ Ka3 Qa5#)
2007.05.01 20:20:50.786 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc3 Rf3+ Kb4 Qb5+ Ka3 Rxb3+ axb3 Qa5#)
2007.05.01 20:20:54.637 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc3 Rf3+ Kb4 Qb5+ Ka3 Qa6+ Kb4 Qb5+ Ka3 Qa5#)
2007.05.01 20:20:55.835 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kh1 Bf3+ Ng2 Bxg2#)
2007.05.01 20:21:03.834 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc3 Rf3+ Kb4 Qb5+ Ka3 Qa6+ Kb4 Qb5+ Ka3 Rxb3+ axb3 Qa5#)
2007.05.01 20:21:14.804 MA: (Qxf2+ Rxf2 Rxf2+ Kg1 h2+ Kxf2 Rf6+ Ke1 h1=Q+ Nf1 Qxf1+ Kd2 Qe2+ Kc3 Rf3+ Kb4 Qb5+ Ka3 Qa6+ Kb4 Qb5+ Ka3 Qa6+ Kb4 Qb5+ Ka3 Qa5#)
2007.05.01 20:21:16.122 MA: (Qxf2+ Kh1 Bf3+ Ng2 hxg2#)
2007.05.01 20:21:16.779 MA: (Qxf2+ Ng2 Qxg2#)
```