PID: 186669 (1n6/8/1Q4N1/Np1k4/1p4P1/1r2P2K/B2bR3/n5B1 w - - 0 1)
Mere, S
Chess, 1960
#2
9 + 7
SOLUTION
SOUND
Sets
1...Bc3
2.e4#
1...Sa6
2.Qc6#
1...Sc6
2.Qxc6#
1...Sd7
2.Qc6#
Tries
1.Kg2?
threat
2.e4#
1...Ke4
2.Qd4#
1...Sc6
2.Qxc6#
1...Bxe3!
1.Sf4+?
1...Ke5
2.Qd4#
2.Qe6#
1...Ke4!
1.Bxb3+?
1...Sxb3
2.e4#
1...Ke4!
1.Qe6+?
1...Kc5
2.Sb7#
1...Kxe6!
Keys
1.Qf6!
threat
2.Qe5#
1...Ke4
2.Qf5#
1...Kc5
2.Qd4#
1...Bc3
2.e4#
1...Sc6
2.Qxc6#
1...Sd7
2.Qc6#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 2
REMOVED MATES = 1
Sets
B(b);N_PINP(D)::P(D)
S(g);N_GUARD::QAB1(H)
S(g);N_GUARD::QAB1(H),XS(g)
Tries
Try
K(E);N_SPINP(D),S_FLIGHT
Threat
P(D)
Vars
K(f);N_SPINR(c),S_FLIGHT::QAR1(H)
S(g);N_GUARD::QAB1(H),XS(g)
Refutation
B(b);XP(D)
Try
S(I);CHECK
Refutation
K(f);N_SPINR(c),S_FLIGHT
Try
B(B);CHECK,N_SPINP(D),XR(c)
Vars
S(a);XB(B)::P(D)
Refutation
K(f);S_FLIGHT
Try
Q(H);CHECK
Vars
K(f);N_SPINR(c),P-FLIGHT::S(G)
Refutation
K(f);S_FLIGHT,XQ(H)
Actual
Q(H);
Threat
QAR1(H)
Vars
K(f);N_SPINR(c),S_FLIGHT::QAB1(H)
K(f);N_SPINR(c),P-FLIGHT::QAB1(H)
B(b);N_PINP(D)::P(D)
S(g);N_GUARD::QAB1(H),XS(g)
S(g);N_GUARD::QAB1(H)
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).