PID: 215126 (5b2/P3n1r1/QP2pN1B/1NkP4/K3pn1r/1P5b/4p1pq/8 w - - 0 1)
Anonymous
SEPA, 1942
#2
9 + 12
SOLUTION
SOUND
Sets
1...Sd3
2.Be3#
1...Sh5
2.Be3#
1...Sfg6
2.Be3#
Tries
1.Qb7?
threat
2.Sxe4#
2.Sd7#
1...Sfxd5
2.Sd7#
1...Sexd5
2.Sxe4#
1...e1Q
2.Sd7#
1...e1R
2.Sd7#
1...Bf5
2.Sd7#
1...Sd3
2.Sd7#
2.Be3#
1...Sh5
2.Sd7#
2.Be3#
1...Sfg6
2.Sd7#
2.Be3#
1...Sf5
2.Sxe4#
2.Qc6#
1...Sc6
2.Qxc6#
1...Seg6
2.Sxe4#
2.Qc6#
1...Sc8
2.Sxe4#
2.Qc6#
1...Sg8
2.Sxe4#
2.Qc6#
1...e3
2.Se4#
2.Sd7#
1...e5
2.Sxe4#
1...exd5!
1.Qc8+?
1...Kxb6
2.Sd7#
2.a8S#
1...Sc6
2.Qxc6#
1...Sxc8!
1.a8Q?
threat
2.Sxe4#
2.Sd7#
1...Sfxd5
2.Sd7#
1...Sexd5
2.Sxe4#
1...e1Q
2.Sd7#
1...e1R
2.Sd7#
1...Bf5
2.Sd7#
1...Sd3
2.Sd7#
2.Be3#
1...Sh5
2.Sd7#
2.Be3#
1...Sfg6
2.Sd7#
2.Be3#
1...Sf5
2.Sxe4#
2.Qc6#
1...Sc6
2.Qxc6#
1...Seg6
2.Sxe4#
2.Qc6#
1...Sc8
2.Sxe4#
2.Qc6#
1...Sg8
2.Sxe4#
2.Qc6#
1...e3
2.Se4#
2.Sd7#
1...e5
2.Sxe4#
1...exd5!
Keys
1.b7!
threat
2.Qd6#
1...Sfxd5
2.Sd7#
1...Sexd5
2.Sxe4#
1...Sd3
2.Be3#
1...Sh5
2.Be3#
1...Sfg6
2.Be3#
1...Sf5
2.Qc6#
1...Sc6
2.Qxc6#
1...Seg6
2.Qc6#
1...Sc8
2.Qc6#
1...Sg8
2.Qc6#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 7
REMOVED MATES = 0
Sets
S(f);OGATE::B(H)
Tries
Try
Q(E);
Threat
DUALS(2)
Vars
S(f);XP(D)::S(G)
S(j);XP(D)::S(G),XP(e)
P(a);::S(G)
B(d);::S(G)
S(j);N_GUARD::QAR1(E),XS(j)
P(i);::S(G),XP(e)
Refutation
P(i);XP(D)
Try
Q(E);CHECK
Vars
S(j);N_GUARD,P_SPINS(j)::QAR1(E),XS(j)
Refutation
S(j);XQ(E)
Try
P(I);
Threat
DUALS(2)
Vars
S(f);XP(D)::S(G)
S(j);XP(D)::S(G),XP(e)
P(a);::S(G)
B(d);::S(G)
S(j);N_GUARD::QAR1(I),XS(j)
P(i);::S(G),XP(e)
Refutation
P(i);XP(D)
Actual
P(F);
Threat
QAB1(E)
Vars
S(f);SBLOCK,XP(D)::S(G)
S(j);SBLOCK,XP(D)::S(G),XP(e)
S(f);OGATE::B(H)
S(j);N_GUARD::QAR1(E)
S(j);N_GUARD::QAR1(E),XS(j)
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).