PID: 53809 (N4N2/1n2n2R/3k4/B2P2QK/3P4/7p/2r1r3/8 w - - 0 1)
Lort, MC
Chess, 1942
#2
8 + 6
SOLUTION
SOUND
Sets
1...Ra2
2.Bc7#
1...Rb2
2.Bc7#
1...Rcd2
2.Bc7#
1...Rc7
2.Bxc7#
1...Red2
2.Qe5#
1...Rf2
2.Qe5#
1...Rg2
2.Qe5#
1...Rh2
2.Qe5#
1...Re5
2.Qxe5#
1...Sc5
2.Bc7#
1...Sf5
2.Rd7#
1...Sc6
2.Bc7#
2.Rd7#
1...Sg6
2.Rd7#
1...Sc8
2.Rd7#
1...Sg8
2.Rd7#
Tries
1.Sc7?
threat
2.Sb5#
2.Se8#
1...Sxd5
2.Qxd5#
1...Rb2
2.Se8#
1...Rc5
2.Se8#
1...Re5
2.Qxe5#
1...Sf5
2.Rd7#
1...Sc6
2.Sb5#
2.Rd7#
1...Sg6
2.Sb5#
2.Rd7#
1...Sc8
2.Sb5#
2.Rd7#
1...Sg8
2.Sb5#
2.Rd7#
1...Rxc7!
1.Rh6+?
1...Re6
2.Rxe6#
2.Qe5#
1...Sg6!
1.Rxe7?
threat
2.Rd7#
1...Rc7
2.Bxc7#
1...Sc5
2.Bc7#
1...Rxe7!
1.Qf4+?
1...Re5+
2.Qxe5#
1...Kxd5!
1.Qf6+?
1...Re6
2.Qxe6#
1...Kxd5!
1.Qh6+?
1...Re6
2.Qxe6#
1...Sg6
2.Rd7#
1...Kxd5!
1.Qg3+?
1...Re5+
2.Qxe5#
1...Kxd5!
1.Qg6+?
1...Re6
2.Qxe6#
1...Sxg6
2.Rd7#
1...Kxd5!
Keys
1.Qf5!
threat
2.Qd7#
1...Sxf5
2.Rd7#
1...Re5
2.Qxe5#
1...Rc7
2.Bxc7#
1...Re6
2.Qxe6#
1...Sc5
2.Bc7#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 1
REMOVED MATES = 10
Sets
R(a);N_GUARD::B(B)
R(a);N_GUARD::B(B),XR(a)
R(b);N_GUARD::QAB1(D)
R(b);N_GUARD,P_PINQ(D)::QAB1(D),XR(b)
S(e);S_CUTR(a)::B(B)
S(f);OGATE::R1(F)
Tries
Try
S(G);
Threat
DUALS(2)
Vars
S(f);OGATE,XP(C)::QAR1(D),XS(f)
R(a);::S(G)
R(b);N_GUARD,P_PINQ(D)::QAB1(D),XR(b)
S(f);OGATE::R1(F)
Refutation
R(a);XS(G)
Try
R(F);CHECK
Refutation
S(f);P_SPINS(f)
Try
R(F);XS(f)
Threat
R1(F)
Vars
R(a);N_GUARD::B(B),XR(a)
S(e);S_CUTR(a)::B(B)
Refutation
R(b);XR(F)
Try
Q(D);CHECK
Vars
R(b);CHECK,N_GUARD,P_SPINR(b)::QAB1(D),XR(b)
Refutation
K(d);P-FLIGHT,XP(C)
Try
Q(D);CHECK
Vars
R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
Refutation
K(d);P-FLIGHT,XP(C)
Try
Q(D);CHECK
Vars
R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
S(f);OGATE,P_SPINS(f)::R1(F)
Refutation
K(d);P-FLIGHT,XP(C)
Try
Q(D);CHECK
Vars
R(b);CHECK,N_GUARD,P_SPINR(b)::QAB1(D),XR(b)
Refutation
K(d);P-FLIGHT,XP(C)
Try
Q(D);CHECK
Vars
R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
S(f);OGATE,XQ(D)::R1(F)
Refutation
K(d);P-FLIGHT,XP(C)
Actual
Q(D);
Threat
QAR1(D)
Vars
S(f);OGATE,XQ(D)::R1(F)
R(b);N_GUARD,P_PINQ(D)::QAB1(D),XR(b)
R(a);N_GUARD::B(B),XR(a)
R(b);N_GUARD::QAR1(D),XR(b)
S(e);S_CUTR(a)::B(B)
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).