PID: 66888 (8/3B3N/3b4/1pn1p3/2n1k3/2PR4/Q5NK/5b2 w - - 0 1)
Beaty, JH
Chess, 1947
#2
7 + 7
SOLUTION
SOUND
Sets
1...Sb2
2.Re3#
2.Qd5#
1...Sd2
2.Re3#
2.Qd5#
1...Sa3
2.Re3#
2.Qd5#
1...Se3
2.Rxe3#
1...Sa5
2.Re3#
2.Qd5#
1...Sb6
2.Re3#
1...Sxd3
2.Qa8#
1...b4
2.Qxc4#
Tries
1.Re3+?
1...Kd5
2.Sf6#
1...Sxe3!
1.Rd4+?
1...Kf3
2.Sg5#
2.Bg4#
1...exd4+!
1.Qe2+?
1...Se3
2.Sg5#
2.Sf6#
2.Qxe3#
1...Bxe2!
1.Qf2?
threat
2.Bf5#
2.Qf3#
2.Qf5#
1...Bxg2
2.Bf5#
2.Qf5#
1...Bxd3
2.Sf6#
2.Bc6#
1...Sxd3
2.Sf6#
2.Bc6#
1...Sxd7
2.Qf3#
1...Be2
2.Bf5#
2.Qf5#
1...Sd2
2.Bf5#
2.Qe3#
2.Qf5#
1...Se3
2.Qxe3#
1...Se6
2.Qf3#
1...Kxd3!
Keys
1.Rf3!
threat
2.Bc6#
1...Kxf3
2.Sg5#
1...Kd5
2.Sf6#
1...Sxd7
2.Qa8#
1...Se3
2.Rxe3#
1...Sa5
2.Sg5#
2.Re3#
1...Sb6
2.Sg5#
2.Re3#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 3
REMOVED MATES = 3
Sets
S(b);N_GUARD::R1(E),XS(b)
S(b);N_GUARD::R1(E)
S(e);N_GUARD,SBLOCK,XR(E)::QAB(A)
P(d);N_GUARD::QAR2(A),XS(b)
Tries
Try
R(E);CHECK
Vars
K(c);P_SPINS(b),S_FLIGHT::S(G)
Refutation
S(b);XR(E)
Try
R(E);CHECK
Refutation
P(f);CHECK,XR(E)
Try
Q(A);CHECK
Refutation
B(a);XQ(A)
Try
Q(A);
Threat
DUALS(3)
Vars
S(e);XB(F)::QAB1(A)
S(b);N_GUARD::QAR1(A),XS(b)
S(e);::QAB1(A)
Refutation
K(c);S_FLIGHT,XR(E)
Actual
R(E);
Threat
B(F)
Vars
K(c);S_FLIGHT,XR(E)::S(G)
K(c);P_SPINS(b),S_FLIGHT::S(G)
S(e);N_GUARD,XB(F)::QAB(A)
S(b);N_GUARD::R1(E),XS(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).