PID: 11223 (8/8/8/2nQpp2/R1bN1kN1/3P1P2/6K1/8 w - - 0 1)
Weberg, C
Chess, 1937
#2
7 + 5
SOLUTION
SOUND
Sets
1...Ba2
2.Se6#
1...Bb3
2.Se6#
1...Bxd3
2.Se6#
1...Bb5
2.Se6#
1...Bxd5
2.Se6#
1...Ba6
2.Se6#
1...Sb3
2.Se6#
1...Sxd3
2.Se6#
1...Sxa4
2.Se6#
1...Se4
2.Se6#
1...Sa6
2.Se6#
1...Se6
2.Sxe6#
1...Sb7
2.Se6#
1...Sd7
2.Se6#
1...e4
2.Qxf5#
Tries
1.Qc6?
threat
2.Qh6#
1...Kg5
2.Qh6#
1...Be6
2.Sxe6#
1...Se6
2.Sxe6#
1...Se4!
1.Qd6?
threat
2.Qh6#
1...Kg5
2.Qh6#
1...Be6
2.Sxe6#
1...Se6
2.Sxe6#
1...Se4!
Keys
1.Qe6!
threat
2.Qxf5#
2.Qh6#
1...Kg5
2.Qh6#
1...Bxd3
2.Qh6#
1...Bxe6
2.Sxe6#
1...Sxe6
2.Sxe6#
1...exd4
2.Qh6#
1...fxg4
2.Qh6#
1...Se4
2.Qxf5#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 2
ADDED MATES = 4
REMOVED MATES = 12
Sets
B(a);::R(D)+S(E),DCHECK
B(a);XP(B)::R(D)+S(E),DCHECK
B(a);P_PINP(C),XQ(G)::R(D)+S(E),DCHECK
S(c);N_GUARD::S(E)
S(c);N_GUARD,XP(B)::S(E)
S(c);N_GUARD,XR(D)::S(E)
S(c);N_GUARD::S(E),XS(c)
P(d);OGATE::QAR1(G),XP(e)
Tries
Try
Q(G);
Threat
QAB(G)
Vars
K(b);S_FLIGHT::QAB1(G)
B(a);::R(D)+S(E),DCHECK,XB(a)
S(c);N_GUARD::S(E),XS(c)
Refutation
S(c);
Try
Q(G);P_PINP(d)
Threat
QAB(G)
Vars
K(b);N_SPINP(d),S_FLIGHT::QAB1(G)
B(a);::R(D)+S(E),DCHECK,XB(a)
S(c);N_GUARD::S(E),XS(c)
Refutation
S(c);
Actual
Q(G);
Threat
DUALS(2)
Vars
K(b);S_FLIGHT::QAB1(G)
B(a);XP(B)::QAB(G)
B(a);XQ(G)::R(D)+S(E),DCHECK,XB(a)
S(c);XQ(G)::S(E),XS(c)
P(d);XS(E)::QAB(G)
P(e);XS(F)::QAB(G)
S(c);::QAR1(G),XP(e)
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).