var extexts = new Array(
"8/1P6/k7/8/1K6/8/8/8 w - - 0 1_49-57-R{b8R}",
"8/8/1B6/8/pk6/nb6/8/1KQ5 w - - 0 1{%HGurgenidze 1986}_2-16{Qxa3+}_25-16{Kxa3}_41-34{Bc5#}",
"6R1/5p2/6pk/4R3/5K2/8/8/6q1 w - - 0 1{%HRusinek 1986}_36-39{Rh5+}_47-39{Kxh5}_s46-39{gxh5}_e62-6{Rxg1}_62-63{Rh8#}",
"k7/2B5/KP5q/4b3/8/8/8/2R5 w - - 0 1{%HMakletsov 1986}_50-43{Bd6}_47-43{Qxd6}_s36-43{Bxd6}_41-49{b7+}_56-57{Kb8}_e2-58{Rc8#}_2-58{Rc8+}_43-57{Qb8}_41-49{b7#}",
"3Q4/1p3ppk/p5rp/8/5N2/P1P1nP1P/3R2PK/5q2 b - - 0 1{%HVukovic-Plater<br>Krynica 1956}_5-4{Qe1}_11-12{Re2}_4-22{Qg3+}_15-6{Kg1}_22-29{Qxf4}",
"2r5/2r5/3R1bk1/5q1p/1p2QPnP/1P6/PB6/1K1R4 w - - 0 1_43-45{Rxf6+}_30-45{Nxf6}_3-6{Rg1+}_45-30{Ng4}_6-30{Rxg4+}_39-30{hxg4}_31-39{h5+}",
"3R4/5p1k/4pnpp/1N6/P1r5/1Q3PP1/1PP3PK/4q3 b - - 0 1_26-30{Rg4}_21-30{fxg4}_45-30{Nxg4+}_15-23{Kh3}_30-13{Nf2+}_23-15{Kh2}_4-7{Qh1#}",
"8/r1p5/8/2Np4/p5pp/7k/5K1P/R7 w - - 0 1{%HHolm 1917}_0-7{Rh1}_50-42{c6}_s30-22{g3+}_15-22{hxg3+}_23-30{Kg4}_7-31{Rxh4+}_30-37{Kf5}_e31-24{Rxa4}_s48-56{Ra8}_34-44{Ne6}_30-22{g3+}_15-22{hxg3+}_23-30{Kg4}_7-31{Rxh4+}_30-37{Kf5}_44-50{Nxc7}_56-32{Ra5}_e50-35{Nxd5}_34-44{Ne6}_48-53{Rf7+}_13-6{Kg1}_53-37{Rf5}_44-29{Nf4+}_37-29{Rxf4}{&frac12}"
);