PID: 158546 (n4N2/3p2Br/3PR1p1/Q1K2k2/1pP3Rn/2q1p2B/8/8 w - - 0 1)
Henry, S
Chess, 1955
#2
9 + 9
SOLUTION
SOUND
Sets
1...Qe1
2.Kd4#
2.Re5#
1...Qd2
2.Re5#
1...Qd4+
2.Kxd4#
1...Qe5+
2.Rxe5#
1...Qc1
2.Kxb4#
2.Kd4#
2.Re5#
1...Qc2
2.Kxb4#
2.Kd4#
2.Re5#
1...Qa3
2.Re5#
1...Qb3
2.Kd4#
2.Re5#
1...Qd3
2.Re5#
1...Qxc4+
2.Kxc4#
Tries
1.Bxc3?
threat
2.Kxb4#
2.Kd4#
2.Rf6#
1...bxc3
2.Kb4#
2.Kd4#
1...Rf7
2.Kxb4#
2.Kd4#
1...Sf3
2.Rf6#
1...Sb6
2.Kxb6#
2.Rf6#
1...Sc7
2.Rf6#
1...b3
2.Kb4#
2.Kd4#
2.Rf6#
1...dxe6!
1.Rf6+?
1...Ke5
2.Sxd7#
1...Qxf6!
Keys
1.Qd8!
threat
2.Rd4#
2.Rge4#
2.Rxh4#
2.Qg5#
1...Qd4+
2.Rxd4#
1...Qe5+
2.Rxe5#
1...Qxc4+
2.Rxc4#
1...dxe6
2.Rd4#
2.Rxh4#
2.Qg5#
1...Qf6
2.Qxf6#
1...Rh5
2.Rd4#
2.Rge4#
2.Rxh4#
1...Sg2
2.Rh4#
2.Qg5#
1...Sf3
2.Rh4#
1...e2
2.Qg5#
1...g5
2.Qxg5#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 2
ADDED MATES = 4
REMOVED MATES = 3
Sets
Q(a);N_GUARD,N_PINP(B)::R1(G)
Q(a);CHECK,N_PINP(B)::QAR(D)+K(E),XQ(a)
Q(a);CHECK,N_GUARD,N_PINP(B)::R1(G),XQ(a)
Q(a);CHECK,XP(B)::QAR(D)+K(E),XQ(a)
Tries
Try
B(H);N_SPINP(B),XQ(a)
Threat
DUALS(3)
Vars
S(d);::R1(G)
S(i);::R1(G)
Refutation
P(g);XR(G)
Try
R(G);CHECK
Vars
K(e);P-FLIGHT::S(I),XP(g)
Refutation
Q(a);N_PINP(B),XR(G)
Actual
Q(D);
Threat
DUALS(4)
Vars
Q(a);CHECK,N_PINP(B)::B(A)+R(C),XQ(a)
Q(a);CHECK,N_GUARD,N_PINP(B)::R1(G),XQ(a)
Q(a);CHECK,OGATE,XP(B)::B(A)+R(C),XQ(a)
Q(a);N_GUARD,N_PINP(B)::QAR1(D),XQ(a)
S(d);::B(A)+R(C)
P(b);::QAR1(D)
P(f);::QAR1(D),XP(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).