PID: 68376 (2K2NQ1/1pn5/3p4/6R1/RB1qpk2/3b2n1/6P1/3N4 w - - 0 1)
Peake, JL
Chess, 1949
#2
8 + 8
SOLUTION
SOUND
Sets
1...Qa1
2.Bd2#
1...Qg1
2.Bxd6#
1...Qf2
2.Bxd6#
1...Qe3
2.Bxd6#
1...Qe5
2.Bd2#
1...Qf6
2.Bd2#
1...Qa7
2.Bxd6#
1...Qg7
2.Bd2#
1...Qh8
2.Bd2#
1...Qc4
2.Bxd6#
1...Qd5
2.Bd2#
1...Sb5
2.Se6#
1...Sd5
2.Se6#
1...Sa6
2.Se6#
1...Se6
2.Sxe6#
1...Sa8
2.Se6#
1...Se8
2.Se6#
Tries
1.Bd2+?
1...Qe3
2.Bxe3#
1...e3!
1.Bxd6+?
1...Qe5
2.Bxe5#
1...Qxd6!
1.Rg4+?
1...Kf5
2.Qg5#
1...Ke5!
1.Qf7+?
1...Qf6
2.Bd2#
1...Sf5
2.Qxf5#
1...Kxg5!
Keys
1.Qd5!
threat
2.Sg6#
1...Qxd5
2.Bd2#
1...Sxd5
2.Se6#
1...Qe5
2.Bd2#
1...Sf5
2.Qxf5#
1...Qf6
2.Bd2#
1...Qg7
2.Bd2#
1...Qh8
2.Bd2#
1...e3
2.Bxd6#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 2
REMOVED MATES = 11
Sets
Q(c);N_GUARD,S_CUTP(d)::B(D)
Q(c);N_GUARD::B(D),XP(f)
S(h);N_GUARD::S(G)
S(h);N_GUARD::S(G),XS(h)
Tries
Try
B(D);CHECK
Vars
Q(c);N_GUARD,P_SPINP(d),P_SPINQ(c)::B(D),XQ(c)
Refutation
P(d);P_SPINP(d),P_SPINQ(c)
Try
B(D);CHECK,XP(f)
Vars
Q(c);N_GUARD,P_SPINP(d),P_SPINQ(c)::B(D),XQ(c)
Refutation
Q(c);P_SPINP(d),XB(D)
Try
R(E);CHECK
Vars
K(e);P-FLIGHT::QAR1(H)
Refutation
K(e);S_FLIGHT
Try
Q(H);CHECK
Vars
Q(c);P_SPINQ(c)::B(D)
S(b);N_GUARD,P_SPINS(b)::QAR1(H),XS(b)
Refutation
K(e);S_FLIGHT,XR(E)
Actual
Q(H);
Threat
S(G)
Vars
Q(c);N_GUARD,S_CUTP(d),XQ(H)::B(D)
S(h);N_GUARD,XQ(H)::S(G)
Q(c);N_GUARD,S_CUTP(d)::B(D)
S(b);N_GUARD::QAR1(H),XS(b)
Q(c);N_GUARD,P_PINS(G),S_CUTP(d)::B(D)
P(d);S_CUTQ(c)::B(D),XP(f)
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).