PID: 215129 (4r2r/B4Q2/6p1/1p2NR2/1P2k3/K2p1q1n/3R4/3b1n1B w - - 0 1)
Anonymous
SEPA, 1942
#2
8 + 10
SOLUTION
SOUND
Sets
1...Bc2
2.Bxf3#
1...Bb3
2.Bxf3#
1...Ba4
2.Bxf3#
Tries
1.Sxf3?
threat
2.Sg5#
2.Qd5#
1...Bxf3
2.Bxf3#
2.Qd5#
1...Re5
2.Sg5#
2.Rxe5#
1...Re6
2.Sg5#
2.Qxe6#
1...Rd8
2.Sg5#
2.Re5#
2.Qe6#
1...Bb3
2.Se1#
2.Sg1#
2.Sh2#
2.Sh4#
2.Se5#
2.Sg5#
1...Se3
2.Sg5#
1...Sf4
2.Sg5#
2.Rxf4#
1...Sg5
2.Sxg5#
2.Rf4#
2.Qd5#
1...g5
2.Sxg5#
2.Qd5#
1...gxf5!
1.Sc4?
threat
2.Sd6#
2.Qd5#
1...bxc4
2.Qd5#
1...Re5
2.Sd6#
2.Rxe5#
1...Re6
2.Qxe6#
1...Rd8
2.Re5#
2.Qe6#
1...Se3
2.Sd6#
1...Sf4
2.Sd6#
2.Rxf4#
1...gxf5!
1.Sxg6?
threat
2.Qd5#
1...Re5
2.Rxe5#
1...Re6
2.Qxe6#
1...Rd8
2.Re5#
2.Qe6#
1...Bb3
2.Bxf3#
1...Sf4
2.Rxf4#
1...Se3!
1.Re2+?
1...Se3
2.Bxf3#
2.Rxe3#
1...dxe2+
2.Bxf3#
1...Bxe2!
Keys
1.Sxd3!
threat
2.Qd5#
1...gxf5
2.Qb7#
1...Re5
2.Rxe5#
1...Re6
2.Qxe6#
1...Rd8
2.Re5#
2.Qe6#
1...Bb3
2.Bxf3#
1...Se3
2.Sc5#
1...Sf4
2.Rxf4#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 5
REMOVED MATES = 2
Sets
B(a);N_GUARD::B(A),XQ(d)
Tries
Try
S(E);XQ(d)
Threat
DUALS(2)
Vars
S(b);::B(A)+S(E),DCHECK
Refutation
P(h);XR(F)
Try
S(E);
Threat
DUALS(2)
Vars
P(g);XS(E)::QAB1(H)
R(i);N_GUARD::QAR2(H),XR(i)
S(b);::S(E)
Refutation
P(h);XR(F)
Try
S(E);XP(h)
Threat
QAB1(H)
Vars
R(i);N_GUARD::R1(F),XR(i)
R(i);N_GUARD::QAR2(H),XR(i)
B(a);N_GUARD::B(A),XQ(d)
S(e);N_GUARD::R1(F),XS(e)
Refutation
S(b);
Try
R(B);CHECK
Vars
P(c);CHECK,XR(B)::B(A),XQ(d)
Refutation
B(a);XR(B)
Actual
S(E);P_SPINS(E),XP(c)
Threat
QAB1(H)
Vars
P(h);SBLOCK,XR(F)::QAB(H)
R(i);N_GUARD::R1(F),XR(i)
R(i);N_GUARD::QAR2(H),XR(i)
B(a);N_GUARD,N_PINS(E)::B(A),XQ(d)
S(b);N_PINS(E),SBLOCK::S(E)
S(e);N_GUARD::R1(F),XS(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).