PID: 16514 (r1B2n2/q1R3R1/3k4/P1N2b2/1P6/5N2/Q7/K4n2 w - - 0 1)
Glass, H
Chess, 1941
#2
9 + 6
SOLUTION
SOUND
Sets
1...Qxc5
2.bxc5#
1...Qxa5
2.Sb7#
1...Qb7
2.Sxb7#
1...Bh3
2.Se4#
1...Be4
2.Sxe4#
1...Bg4
2.Se4#
1...Be6
2.Se4#
1...Bxc8
2.Se4#
1...Se6
2.Rgd7#
Tries
1.Bb7?
threat
2.Rc6#
2.Qd5#
1...Qxc5
2.bxc5#
1...Qxa5
2.Rc6#
1...Qxb7
2.Sxb7#
1...Sd7
2.Rc6#
1...Qb6
2.Qd5#
1...Qa6
2.Qd5#
1...Rc8
2.Qd5#
1...Be4
2.Sxe4#
1...Be6
2.Se4#
2.Rc6#
1...Se3
2.Rc6#
2.Qh2#
1...Bd7!
1.Qe6+?
1...Sxe6
2.Rgd7#
1...Bxe6!
1.Qd2+?
1...Bd3
2.Qxd3#
1...Sxd2!
Keys
1.Be6!
threat
2.Qd5#
1...Qxc5
2.bxc5#
1...Qxa5
2.Sb7#
1...Bxe6
2.Se4#
1...Sxe6
2.Rgd7#
1...Sd7
2.Rgxd7#
1...Qb7
2.Sxb7#
1...Be4
2.Sxe4#
1...Se3
2.Qh2#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 2
REMOVED MATES = 3
Sets
Q(d);OGATE,XS(F)::P(D),XQ(d)
Q(d);N_GUARD,P_PINQ(B),XP(E)::S(F)
Q(d);N_GUARD::S(F),XQ(d)
B(b);N_GUARD::S(F)
B(b);N_GUARD::S(F),XB(b)
B(b);N_GUARD,XB(I)::S(F)
S(f);N_GUARD,S_CUTB(b)::R1(H)
Tries
Try
B(I);
Threat
DUALS(2)
Vars
Q(d);OGATE,XS(F)::P(D),XQ(d)
Q(d);P_PINQ(B),XP(E)::R1(G)
Q(d);XB(I)::S(F),XQ(d)
S(f);::R1(G)
Q(d);::QAR1(B)
R(e);::QAR1(B)
B(b);N_GUARD::S(F),XB(b)
Refutation
B(b);
Try
Q(B);CHECK,P_SPINP(E)
Vars
S(f);XQ(B)::R1(H)
Refutation
B(b);XQ(B)
Try
Q(B);CHECK,P_SPINP(E)
Vars
B(b);N_GUARD,P_SPINB(b)::QAR(B),XB(b)
Refutation
S(a);XQ(B)
Actual
B(I);
Threat
QAR1(B)
Vars
Q(d);OGATE,XS(F)::P(D),XQ(d)
Q(d);N_GUARD,P_PINQ(B),XP(E)::S(F)
B(b);N_GUARD,XB(I)::S(F)
S(f);N_GUARD,XB(I)::R1(H)
S(f);N_GUARD::R1(H),XS(f)
Q(d);N_GUARD::S(F),XQ(d)
B(b);N_GUARD::S(F),XB(b)
S(a);N_GUARD::QAB(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).