var extexts = new Array(
"rk6/p7/KP6/8/8/8/8/8 w - - 0 1_41-49{b7}_57-50{Kc7}_49-56-Q{bxa8D}_sea49-56-R{bxa8T}{}",
"8/3k4/8/8/2p5/2q4p/3Q1p2/5K2 b - - 0 1_18-19{Dd3+}_se18-11{Dxd2}{&frac12}_11-19{Dxd3+}_26-19{cxd3}",
"rn2k2r/1pq2pb1/p2pb2p/3P2p1/8/4Q3/PPP3PP/2KR1BNR b kq - 0 1_54-36{Le5}",
"r1b2k2/pp1p1Ppp/8/2p5/2n5/4B3/PPP3PP/5RK1 w - - 0 1_20-38{Lg5}_s20-34{Lxc5+}_51-43{d6}_34-25{Lb4}_e58-44{Le6}_51-35{d5}_38-52{Le7+}_61-52{Kxe7}_53-61-Q{f8D+}",
"2rk4/KPp5/8/8/8/8/7P/8 b - - 0 1_50-34{c5}_15-31{h4}_58-50{Tc7}_s34-26{c4}_49-58-Q{bxc8D+}_59-58{Kxc8}_e31-39{h5}_48-41{Kb6}_50-49{Txb7+}_41-49{Kxb7}_34-26{c4}_sea59-60{Ke8}{}_sea59-52{Ke7}{}_31-39{h5}_59-52{Ke7}_sea59-60{Ke8}{}",
"1k1r4/2qr1pp1/p6p/np1npN1P/4N3/2P3P1/PPQ2P2/K2RR3 b - - 0 1_35-25{Pb4}_10-12{De2}_50-26{Dc4}_s32-17{Pb3+}_e0-1{Kb1}",
"r4rk1/5ppp/1p2b3/p1n5/1q1N4/7P/PPB2PP1/R2QR1K1 w - - 0 1_10-55{Lxh7+}_62-55{Kxh7}_3-39{Dh5+}_55-62{Kg8}_27-42{Pc6}",
"2k4r/P1r5/1Q6/2n2K2/6B1/q7/8/8 w - - 0 1{%HKatsnelson, Mitrofanov 1981}_37-46{Kg6+}_34-44{Pe6}_s58-59{Kd8}_e41-57{Db8+}_s34-51{Pd7}_e41-57{Db8#}_30-44{Lxe6+}_58-59{Kd8}_48-56-Q{a8D+}_16-56{Dxa8}_41-43{Dd6+}_59-60{Ke8}_44-51{Ld7+}_50-51{Txd7}_43-36{De5+}_60-59{Kd8}_36-63{Dxh8+}_59-50{Kc7}_63-56{Dxa8}"
);