PID: 72354 (1Nk5/ppP5/2PP2K1/1p1pNpP1/1R3r2/2r1n1B1/6B1/Q3R3 w - - 0 1)
Hay, RR
Chess, 1953
#2
12 + 9
SOLUTION
SOUND
Sets
1...d4
2.cxb7#
1...bxc6
2.Qa6#
1...b6
2.Qa6#
Tries
1.Bxd5?
threat
2.Be6#
2.cxb7#
1...Rxc6
2.Be6#
1...bxc6
2.Qa6#
1...b6
2.Be6#
2.Qa6#
1...Sxd5!
1.Rh1?
threat
2.Rh8#
1...bxc6
2.Qa6#
1...Rh4!
1.Rxb5?
threat
2.cxb7#
1...bxc6
2.Qa6#
1...b6
2.Qa6#
1...Rxc6!
1.Qa5?
threat
2.d7#
1...bxc6
2.Qa6#
1...b6
2.Qa6#
1...Rxc6!
1.Qxa7?
threat
2.Qxb7#
2.cxb7#
1...bxc6
2.Qa6#
2.d7#
1...b6
2.Qa6#
2.Qb7#
2.d7#
1...Rxc6!
Keys
1.Sc4!
1...Rcxc4
2.Qh8#
1...Rfxc4
2.d7#
1...Sxg2
2.Re8#
1...Sxc4
2.Re8#
1...bxc4
2.cxb7#
1...dxc4
2.cxb7#
1...bxc6
2.Qa6#
1...a5
2.Sb6#
1...Rc1
2.Qh8#
1...Rc2
2.Qh8#
1...Ra3
2.Qh8#
1...Rb3
2.Qh8#
1...Rd3
2.Qh8#
1...Rf1
2.d7#
1...Rf2
2.d7#
1...Rf3
2.d7#
1...Rd4
2.d7#
1...Re4
2.d7#
1...Rg4
2.d7#
1...Rh4
2.d7#
1...Sd1
2.Re8#
1...Sf1
2.Re8#
1...Sc2
2.Re8#
1...Sg4
2.Re8#
1...d4
2.cxb7#
1...a6
2.Sb6#
1...b6
2.Qa6#
FEATURES
Static
TYPE = INCOMPLETE_BLOCK
CHANGED MATES = 0
ADDED MATES = 24
REMOVED MATES = 0
Sets
P(e);::P(H),XP(h)
P(h);OGATEB,XP(H)::QAB(A)
P(h);OGATEB::QAB(A)
Tries
Try
B(C);XP(e)
Threat
DUALS(2)
Vars
R(a);P_PINP(I),XP(H)::B(C)
P(h);OGATEB,XP(H)::QAB(A)
Refutation
S(b);XB(C)
Try
R(B);
Threat
R(B)
Vars
P(h);OGATEB,XP(H)::QAB(A)
Refutation
R(c);
Try
R(E);XP(d)
Threat
P(H),XP(h)
Vars
P(h);OGATEB,XP(H)::QAB(A)
P(h);OGATEB::QAB(A)
Refutation
R(a);P_PINP(I),XP(H)
Try
Q(A);
Threat
P(I)
Vars
P(h);OGATEB,XP(H)::QAB(A)
P(h);OGATEB::QAB(A)
Refutation
R(a);P_PINP(I),XP(H)
Try
Q(A);XP(g)
Threat
DUALS(2)
Refutation
R(a);P_PINP(I),XP(H)
Actual
S(F);
Vars
R(a);OGATE,XS(F)::QAR(A)
R(c);XS(F)::P(I)
S(b);OGATE,XB(C)::R(B)
S(b);OGATE,XS(F)::R(B)
P(d);XS(F)::P(H),XP(h)
P(e);XS(F)::P(H),XP(h)
P(h);OGATEB,XP(H)::QAB(A)
P(g);N_GUARD::S(F)
R(a);OGATE::QAR(A)
R(c);::P(I)
R(c);P_PINP(G)::P(I)
S(b);OGATE::R(B)
P(e);::P(H),XP(h)
P(h);OGATEB::QAB(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).