PID: 215116 (8/2rn4/2p1Qp2/6qb/pBBk3N/6p1/3P4/2N2RK1 w - - 0 1)
Anonymous
SEPA, 1942
#2
8 + 9
SOLUTION
SOUND
Sets
1...Qxd2
2.Sf5#
1...Qe3+
2.dxe3#
1...Qf4
2.Rxf4#
1...Qh6
2.Sf5#
1...Qa5
2.Rf4#
1...Qb5
2.Rf4#
1...Qc5
2.Bc3#
2.Rf4#
1...Qf5
2.Sxf5#
1...Qg7
2.Sf5#
2.Rf4#
1...Qg8
2.Sf5#
2.Rf4#
1...Be2
2.Sxe2#
1...Bf3
2.Sxf3#
1...Bg6
2.Se2#
2.Sf3#
1...Bf7
2.Se2#
2.Sf3#
1...Be8
2.Se2#
2.Sf3#
1...Sc5
2.Bc3#
1...a3
2.Sb3#
1...c5
2.Bc3#
Tries
1.Qd6+?
1...Ke4
2.Bd3#
1...Qd5
2.Rf4#
1...Kxc4!
Keys
1.Bd3!
threat
2.Qe4#
1...Qe3+
2.dxe3#
1...Qxh4
2.Qd6#
1...Qf4
2.Rxf4#
1...Qg4
2.Qd6#
1...Qd5
2.Qe3#
1...Qe5
2.Qc4#
1...Qf5
2.Sxf5#
1...Qg6
2.Qd6#
1...Bf3
2.Sxf3#
1...Bg6
2.Sf3#
1...Sc5
2.Bc3#
1...Se5
2.Qd6#
1...f5
2.Qd6#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 8
REMOVED MATES = 7
Sets
Q(d);N_GUARD,XP(D)::S(G)
Q(d);CHECK,OGATE::P(D),XQ(d)
Q(d);N_GUARD::R(B),XQ(d)
Q(d);N_GUARD::S(G)
Q(d);N_GUARD::R(B)
Q(d);N_GUARD::S(G),XQ(d)
B(e);N_GUARD::S(A),XB(e)
B(e);N_GUARD::S(G),XB(e)
S(i);SBLOCK::B(E)
P(b);N_GUARD::S(A)
P(f);SBLOCK::B(E)
Tries
Try
Q(H);CHECK
Vars
K(c);P-FLIGHT::B(F)
Q(d);P_SPINQ(d)::R(B)
Refutation
K(c);P-FLIGHT,XB(F)
Actual
B(F);
Threat
QAR1(H)
Vars
Q(d);CHECK,OGATE::P(D),XQ(d)
Q(d);N_GUARD,XS(G)::QAR2(H)
Q(d);N_GUARD::R(B),XQ(d)
Q(d);N_GUARD::QAR2(H)
Q(d);N_GUARD,SBLOCK::QAB1(H)
Q(d);SBLOCK::QAR1(H)
Q(d);N_GUARD::S(G),XQ(d)
B(e);N_GUARD::S(G),XB(e)
B(e);N_GUARD::S(G)
S(i);SBLOCK::B(E)
S(i);S_CUTQ(d)::QAR2(H)
P(g);S_CUTQ(d)::QAR2(H)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).