PID: 276507 (4r3/8/3pr2n/2qp3R/5k1N/5N1K/1PpPR3/2B4B w - - 0 1)
Franic, L
Mat, 1981
#2
9 + 8
SOLUTION
SOUND
Sets
1...Re4
2.Sg6#
1...Re5
2.Sg6#
1...Rg6
2.Sxg6#
1...R6e7
2.Sg6#
1...Sg4
2.Rf5#
1...Sf5
2.Rxf5#
1...Sf7
2.Rf5#
1...Sg8
2.Rf5#
Tries
1.d3+?
1...Re3
2.Sg6#
1...Qe3!
Keys
1.Se5!
threat
2.Sg2#
2.Sd3#
2.d4#
1...Qa3+
2.d3#
1...Qe3+
2.dxe3#
1...Qc3+
2.dxc3#
1...Rxe5
2.Sg6#
1...dxe5
2.d4#
1...Qg1
2.Sd3#
1...Qf2
2.Sd3#
2.Rxf2#
1...Qb4
2.Sg2#
2.Sd3#
2.Rf2#
1...Qd4
2.Sg2#
1...Qc4
2.Sg2#
2.Rf2#
2.d3#
2.d4#
1...Qa5
2.Sg2#
2.Sd3#
2.Rf2#
1...Qb5
2.Sg2#
2.Rf2#
2.d3#
2.d4#
1...Rg6
2.Shxg6#
2.Sd3#
2.Sexg6#
2.d4#
1...Rg8
2.Sd3#
2.d4#
1...Sg4
2.Sg2#
2.Sd3#
2.Rf5#
1...Sf5
2.Sg2#
2.Sd3#
2.Rxf5#
1...d4
2.Sg2#
2.Sd3#
2.Rf2#
2.Re4#
2.d3#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 6
REMOVED MATES = 7
Sets
R(f);N_GUARD::S(H)
R(f);N_GUARD::S(H),XR(f)
S(g);N_GUARD::R1(I)
S(g);N_GUARD::R1(I),XS(g)
Tries
Try
P(D);CHECK
Vars
R(f);P_PINS(F),P_SPINR(f)::S(H)
Refutation
Q(c);P_PINS(F),P_SPINQ(c)
Actual
S(F);
Threat
DUALS(3)
Vars
Q(c);CHECK,N_GUARD::B(A)+P(D)
Q(c);CHECK,OGATE::P(D),XQ(c)
Q(c);CHECK,OGATE::B(A)+P(D),XQ(c)
R(f);N_GUARD,XS(F)::S(H)
P(e);XS(F)::B(A)+P(D)
Q(c);::S(F)
Q(c);::S(H)
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).