PID: 72161 (r1B1Rb2/p2rn3/8/1QRb4/4k1P1/4pNK1/1n6/8 w - - 0 1)
Jelfs, H
Chess, 1952
#2
7 + 9
SOLUTION
SOUND
Sets
1...Rd6
2.Bf5#
1...Rb7
2.Bf5#
1...Rc7
2.Bf5#
1...Rd8
2.Bf5#
1...Ba2
2.Re5#
1...Bb3
2.Re5#
1...Bc6
2.Re5#
1...Be6
2.Re5#
1...Bb7
2.Re5#
1...Bf7
2.Re5#
1...Bg8
2.Re5#
1...Sd1
2.Qb1#
1...Sa4
2.Qb1#
1...Sc4
2.Qb1#
1...e2
2.Qxe2#
Tries
1.Bxd7?
threat
2.Bf5#
1...e2
2.Qxe2#
1...Be6
2.Re5#
1...Rxe8!
1.Rc4+?
1...Bxc4
2.Qf5#
1...Sxc4
2.Qb1#
1...Kd3!
1.Rxd5?
threat
2.Sg5#
2.Re5#
1...e2
2.Re5#
1...Bh6
2.Re5#
1...Bg7
2.Sg5#
1...Sd3
2.Sg5#
2.Qxd3#
2.Qc4#
1...Sc4
2.Sg5#
2.Qxc4#
1...Rxd5!
1.Rxe7+?
1...Rxe7
2.Bf5#
1...Be6
2.Re5#
2.Rxe6#
1...Bxe7!
Keys
1.Qa6!
threat
2.Qg6#
1...e2
2.Qxe2#
1...Rd6
2.Bf5#
1...Bc6
2.Re5#
1...Be6
2.Re5#
1...Bf7
2.Re5#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 0
REMOVED MATES = 10
Sets
R(f);OGATE::B(F)
B(d);OGATE::R1(E)
B(d);N_SPINS(g),OGATE::R1(E)
S(a);OGATE::QAB(D)
P(b);OGATEB::QAR2(D),XP(b)
Tries
Try
B(F);XR(f)
Threat
B(F)
Vars
P(b);OGATEB::QAR2(D),XP(b)
B(d);N_SPINS(g),OGATE::R1(E)
Refutation
R(h);N_SPINS(g),XR(G)
Try
R(E);CHECK
Vars
B(d);OGATE,XR(E)::QAB1(D)
S(a);OGATE,XR(E)::QAB(D)
Refutation
K(c);N_SPINS(g),S_FLIGHT
Try
R(E);XB(d)
Threat
DUALS(2)
Vars
P(b);::R1(E)
B(i);::R1(E)
B(i);::S(A)
Refutation
R(f);XR(E)
Try
R(G);CHECK,XS(g)
Vars
R(f);OGATE,XR(G)::B(F)
Refutation
B(i);XR(G)
Actual
Q(D);
Threat
QAB(D)
Vars
P(b);OGATEB::QAR2(D),XP(b)
R(f);OGATE::B(F)
B(d);OGATE::R1(E)
B(d);N_SPINS(g),OGATE::R1(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).