PID: 16349 (1q6/B5p1/1r1R4/4pp1N/4k2b/1Bn5/2PQ2P1/4n2K w - - 0 1)
Murphy, F
Chess, 1940
#2
8 + 9
SOLUTION
SOUND
Sets
1...Rxb3
2.Qe3#
1...Rb4
2.Qe3#
1...Rb5
2.Qe3#
1...Ra6
2.Qe3#
1...Rc6
2.Qe3#
1...Rxd6
2.Qe3#
1...Rb7
2.Qe3#
1...Bg3
2.Sxg3#
1...Bg5
2.Sg3#
1...Bf6
2.Sg3#
1...Be7
2.Sg3#
1...Bd8
2.Sg3#
1...Sxc2
2.Bxc2#
2.Qd3#
1...Sxg2
2.Qd3#
1...Sd3
2.Qxd3#
2.cxd3#
1...Sf3
2.Qd3#
1...Sb1
2.Bd5#
2.Qe2#
1...Sd1
2.Bd5#
1...Sa2
2.Bd5#
2.Qe2#
1...Se2
2.Bd5#
2.Qxe2#
1...Sa4
2.Bd5#
2.Qe2#
1...Sb5
2.Bd5#
2.Qe2#
1...Sd5
2.Bxd5#
1...g5
2.Sf6#
Tries
1.Qxe1+?
1...Se2
2.Qxe2#
1...Bxe1!
Keys
1.Re6!
threat
2.Qf4#
1...Rxb3
2.Qd4#
1...Rxe6
2.Qe3#
1...Sxc2
2.Bxc2#
1...Sxg2
2.Qd3#
1...Sd3
2.Qxd3#
1...f4
2.Qxf4#
1...Bg3
2.Sxg3#
1...Bg5
2.Sg3#
1...Se2
2.Bd5#
1...Sd5
2.Bxd5#
1...g5
2.Sf6#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 1
ADDED MATES = 5
REMOVED MATES = 11
Sets
R(g);XB(E)::QAR1(C)
R(g);::QAR1(C)
R(g);XR(G)::QAR1(C)
B(d);N_GUARD::S(F),XB(d)
B(d);N_GUARD::S(F)
S(a);N_GUARD,XP(D)::QAB1(C)
S(a);N_GUARD::QAB1(C)
S(b);N_GUARD::B(E)
S(b);N_GUARD::B(E),XS(b)
P(h);N_GUARD,S_CUTB(d)::S(F)
Tries
Try
Q(C);CHECK,XS(a)
Vars
S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
Refutation
B(d);XQ(C)
Actual
R(G);P_PINP(e)
Threat
QAR1(C)
Vars
R(g);XB(E)::QAR1(C)
R(g);N_SPINP(e),XR(G)::QAR1(C)
S(a);OGATE,XP(B)::B(E),XS(a)
S(a);N_GUARD,XP(D)::QAB1(C)
S(a);N_GUARD::QAB1(C),XS(a)
P(f);::QAR1(C),XP(f)
B(d);N_GUARD::S(F),XB(d)
B(d);N_GUARD::S(F)
S(b);N_GUARD::B(E)
S(b);N_GUARD::B(E),XS(b)
P(h);N_GUARD,S_CUTB(d)::S(F)
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).