PID: 186046 (R7/bq3Q2/2p4K/1p6/1N1B3p/3n3r/1p6/kb1N2R1 w - - 0 1)
Henry, S
Chess, 1958
#2
7 + 10
SOLUTION
SOUND
Sets
1...Ba2
2.Qxa2#
1...Bc2
2.Qa2#
1...Sc1
2.Bxb2#
1...Se1
2.Bxb2#
1...Sf2
2.Bxb2#
1...Sxb4
2.Bxb2#
1...Sf4
2.Bxb2#
1...Sc5
2.Bxb2#
1...Se5
2.Bxb2#
Keys
1.Sxb2!
threat
2.S2xd3#
2.Sc2#
2.Qa2#
1...Qxa8
2.Sc2#
2.Qa2#
1...Qxf7
2.S2xd3#
1...Sxb2
2.Sc2#
2.Qa2#
1...Sxb4
2.Sd3#
1...Qa6
2.Sc2#
1...Qb6
2.Sc2#
2.Qa2#
1...Qd7
2.Sc2#
2.Qa2#
1...Rh2
2.Qa2#
1...Sc1
2.S2d3#
1...Se1
2.S2d3#
1...Sf2
2.S2d3#
2.Sc2#
2.Qa2#
1...Sf4
2.S2d3#
2.Sc2#
2.Qa2#
1...Sc5
2.S2d3#
2.Sc2#
2.Qa2#
1...Se5
2.S2d3#
2.Sc2#
2.Qa2#
1...c5
2.Sc2#
2.Qa2#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 3
ADDED MATES = 3
REMOVED MATES = 6
Sets
B(b);N_GUARD,N_SPINB(i)::QAR1(F),XB(b)
B(b);N_GUARD::QAR1(F)
S(d);N_GUARD::B(D),XP(c)
S(d);N_GUARD,XS(C)::B(D),XP(c)
Actual
S(A);N_PINB(i),P_PINB(b),XP(c)
Threat
DUALS(3)
Vars
Q(j);XQ(F)::B(D)+S(A),XS(d)
S(d);XS(C)::B(D)+S(A)
Q(j);::S(C)
R(e);::QAR1(F)
S(d);N_SPINB(b),P_SPINB(i)::B(D)+S(A)
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).