PID: 186674 (Nn4Q1/1pn5/rp1R3K/r1k5/p7/8/2B5/2R1B3 w - - 0 1)
Mere, S
Chess, 1960
#2
7 + 8
SOLUTION
SOUND
Sets
1...Kb5
2.Bd3#
1...Sb5
2.Qd5#
1...Sd5
2.Qxd5#
1...Sxa8
2.Qd5#
1...Se8
2.Qd5#
Tries
1.Bb1+?
1...Kb5
2.Sxc7#
2.Bd3#
2.Qc4#
1...Kxd6!
1.Bd1+?
1...Kb5
2.Sxc7#
2.Be2#
2.Qc4#
1...Kxd6!
1.Bb3+?
1...Kb5
2.Sxc7#
2.Qc4#
1...Kxd6!
1.Be4+?
1...Kb5
2.Sxc7#
2.Bd3#
2.Qc4#
1...Kxd6!
1.Bf5+?
1...Kb5
2.Sxc7#
2.Bd3#
2.Qc4#
1...Kxd6!
1.Bg6+?
1...Kb5
2.Sxc7#
2.Bd3#
2.Qc4#
1...Kxd6!
1.Bh7+?
1...Kb5
2.Sxc7#
2.Bd3#
2.Qc4#
1...Kxd6!
1.Rd5+?
1...Kc4
2.Bd1#
2.Bxa4#
1...Kc6
2.Bxa4#
1...Sxd5!
1.Rd7?
threat
2.Bd3#
2.Bxa4#
1...b5+
2.Bg6#
1...Kb5
2.Bd3#
1...Kc6
2.Bxa4#
1...Sd5
2.Qxd5#
1...Sb5
2.Qd5#
1...a3
2.Bd3#
2.Ba4#
1...Sxd7!
1.Rd8?
threat
2.Bd3#
2.Bxa4#
1...b5+
2.Bg6#
1...Kb5
2.Bd3#
1...Kc6
2.Bxa4#
1...Sd5
2.Qxd5#
1...Sb5
2.Qd5#
1...a3
2.Bd3#
2.Ba4#
1...Sd7!
1.Qc4+?
1...Kxc4
2.Bxa4#
1...Kxd6!
1.Qe6?
threat
2.Bd3#
2.Bxa4#
1...Kb5
2.Bd3#
1...Sd5
2.Qxd5#
1...Sb5
2.Qd5#
1...a3
2.Bd3#
2.Ba4#
1...Sxe6!
1.Qg1+?
1...Kc4
2.Bxa4#
1...Kb5
2.Bd3#
1...Kxd6!
1.Qg5+?
1...Kc4
2.Bd1#
2.Bxa4#
1...Sd5
2.Qxd5#
1...Kxd6!
Keys
1.Rdd1!
threat
2.Bxa4#
1...b5+
2.Bg6#
1...Kb5
2.Bd3#
1...Kc6
2.Bxa4#
1...Sd5
2.Qxd5#
1...Sb5
2.Qd5#
1...a3
2.Ba4#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 3
REMOVED MATES = 2
Sets
K(c);P-FLIGHT::B(C)
S(g);N_GUARD,SBLOCK::QAR1(G)
S(g);N_GUARD::QAR1(G),XS(g)
S(g);N_GUARD,XS(F)::QAR1(G)
S(g);N_GUARD::QAR1(G)
Tries
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
B(C);CHECK
Refutation
K(c);S_FLIGHT,XR(D)
Try
R(D);CHECK
Vars
K(c);P-FLIGHT::R(A)+B(C),DCHECK,XP(a)
Refutation
S(g);XR(D)
Try
R(D);
Threat
DUALS(2)
Vars
P(e);CHECK,SBLOCK::R(A)+B(C)
K(c);P-FLIGHT::B(C)
K(c);P-FLIGHT::R(A)+B(C),DCHECK,XP(a)
S(g);N_GUARD::QAR1(G),XS(g)
S(g);N_GUARD,SBLOCK::QAR1(G)
Refutation
S(h);XR(D)
Try
R(D);
Threat
DUALS(2)
Vars
P(e);CHECK,SBLOCK::R(A)+B(C)
K(c);P-FLIGHT::B(C)
K(c);P-FLIGHT::R(A)+B(C),DCHECK,XP(a)
S(g);N_GUARD::QAR1(G),XS(g)
S(g);N_GUARD,SBLOCK::QAR1(G)
Refutation
S(h);
Try
Q(G);CHECK
Vars
K(c);P-FLIGHT,XQ(G)::R(A)+B(C),XP(a)
Refutation
K(c);S_FLIGHT,XR(D)
Try
Q(G);
Threat
DUALS(2)
Vars
K(c);P-FLIGHT::B(C)
S(g);N_GUARD::QAR1(G),XS(g)
S(g);N_GUARD,SBLOCK::QAR1(G)
Refutation
S(g);XQ(G)
Try
Q(G);CHECK
Vars
K(c);P-FLIGHT::R(A)+B(C),XP(a)
K(c);P-FLIGHT::B(C)
Refutation
K(c);S_FLIGHT,XR(D)
Try
Q(G);CHECK
Vars
S(g);N_GUARD,P_SPINS(g)::QAR1(G),XS(g)
Refutation
K(c);S_FLIGHT,XR(D)
Actual
R(D);
Threat
R(A)+B(C),XP(a)
Vars
P(e);CHECK,SBLOCK::R(A)+B(C)
K(c);P-FLIGHT::B(C)
K(c);P-FLIGHT::R(A)+B(C),DCHECK,XP(a)
S(g);N_GUARD::QAR1(G),XS(g)
S(g);N_GUARD,SBLOCK::QAR1(G)
P(a);::R(A)+B(C)
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).