PID: 64418 (Nn6/2N4K/2p4R/1pk1nQ2/8/PP6/1Bq5/1bR3b1 w - - 0 1)
Peake, JL
Chess, 1947
#2
9 + 8
SOLUTION
SOUND
Sets
1...Qc4
2.b4#
1...Ba2
2.Rxc2#
Tries
1.Kg7?
threat
2.Qxe5#
2.Qf8#
1...Qc3
2.Qxe5#
1...Bh2
2.Qf2#
2.Qf8#
1...Bd4
2.Qf8#
1...Sd7!
1.Kh8?
threat
2.Qxe5#
2.Qf8#
1...Qc3
2.Qxe5#
1...Bh2
2.Qf2#
2.Qf8#
1...Bd4
2.Qf8#
1...Sd7!
1.Sa6+?
1...Kd5
2.S8c7#
1...Sxa6!
1.Rg6?
threat
2.Qxe5#
2.Qf8#
1...Qc3
2.Qxe5#
1...Bh2
2.Qf2#
2.Qf8#
1...Bd4
2.Qf8#
1...Sd7!
1.Qxc2+?
1...Sc4
2.b4#
1...Bxc2+!
1.Qd3?
threat
2.Se6#
2.b4#
1...Bd4
2.Bxd4#
2.b4#
1...Sa6
2.Sxa6#
2.Se6#
1...b4
2.Se6#
1...Sxd3!
Keys
1.Qe4!
threat
2.b4#
1...Sg6
2.Qb4#
1...Bd4
2.Bxd4#
1...Sd3
2.Qe7#
1...Sa6
2.Sxa6#
1...b4
2.axb4#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 5
REMOVED MATES = 2
Sets
Q(c);::P(D)
B(a);N_GUARD::R(A),XQ(c)
Tries
Try
K(H);N_SPINQ(E),P-FLIGHT
Threat
DUALS(2)
Vars
Q(c);::QAR2(E),XS(f)
B(b);::QAB(E)
Refutation
S(h);
Try
K(H);N_SPINQ(E),P-FLIGHT
Threat
DUALS(2)
Vars
Q(c);::QAR2(E),XS(f)
B(b);::QAB(E)
Refutation
S(h);
Try
S(G);CHECK
Vars
K(e);N_SPINQ(c),P-FLIGHT::S(I)
Refutation
S(h);XS(G)
Try
R(F);N_SPINQ(E)
Threat
DUALS(2)
Vars
Q(c);::QAR2(E),XS(f)
B(b);::QAB(E)
Refutation
S(h);
Try
Q(E);CHECK,N_PINS(f),XQ(c)
Vars
S(f);P_SPINS(f)::P(D)
Refutation
B(a);CHECK,P_SPINB(a),XQ(E)
Try
Q(E);N_PINS(f)
Threat
DUALS(2)
Vars
P(d);::S(G)
Refutation
S(f);XQ(E)
Actual
Q(E);N_PINS(f)
Threat
P(D)
Vars
S(f);N_PINQ(E)::QAB1(E)
B(b);N_GUARD::B(B),XB(b)
S(f);N_PINQ(E)::QAB(E)
S(h);N_GUARD::S(G),XS(h)
P(d);OGATE::P(C),XP(d)
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).