PID: 11189 (b2R3K/4Q1Np/8/4p2B/1p2kB2/2q1n3/2P1N1P1/4n3 w - - 0 1)
Evans, TC
Chess, 1937
#2
9 + 8
SOLUTION
SOUND
Sets
1...Qd2
2.Qxe5#
1...Qd4
2.Rxd4#
1...Qxc2
2.Rd4#
2.Qxe5#
1...Qa3
2.Rd4#
2.Qxe5#
1...Qb3
2.Rd4#
2.Qxe5#
1...Qd3
2.Qxe5#
1...Qc4
2.Qxe5#
1...Qc6
2.Rd4#
2.Qxe5#
1...Qc7
2.Rd4#
1...Qc8
2.Qxe5#
1...S1xc2
2.Bf3#
1...Sd3
2.Bf3#
1...Sf3
2.Bxf3#
2.gxf3#
Tries
1.Sxc3+?
1...bxc3
2.Qxe5#
1...Kxf4!
1.Bg6+?
1...Sf5
2.Bxf5#
1...hxg6!
1.Qg5?
threat
2.Sg3#
1...S3xc2
2.Qf5#
1...S3xg2
2.Qf5#
1...exf4
2.Qxf4#
1...Sd1
2.Qf5#
1...Sf1
2.Qf5#
1...Sc4
2.Qf5#
1...Sg4
2.Qf5#
1...Sd5
2.Qf5#
1...Sf5
2.Qxf5#
1...Bd5!
1.Qf6?
threat
2.Sg3#
1...S3xc2
2.Qf5#
1...S3xg2
2.Qf5#
1...exf4
2.Qxf4#
1...Sd1
2.Qf5#
1...Sf1
2.Qf5#
1...Sc4
2.Qf5#
1...Sg4
2.Qf5#
1...Sd5
2.Qf5#
1...Sf5
2.Qxf5#
1...Bd5!
1.Qf8?
threat
2.Sg3#
1...S3xc2
2.Qf5#
1...S3xg2
2.Qf5#
1...exf4
2.Qxf4#
1...Sd1
2.Qf5#
1...Sf1
2.Qf5#
1...Sc4
2.Qf5#
1...Sg4
2.Qf5#
1...Sd5
2.Qf5#
1...Sf5
2.Qxf5#
1...Bd5!
1.Qf7?
threat
2.Sg3#
1...S3xc2
2.Qf5#
1...S3xg2
2.Qf5#
1...exf4
2.Qxf4#
1...Sd1
2.Qf5#
1...Sf1
2.Qf5#
1...Sc4
2.Qf5#
1...Sg4
2.Qf5#
1...Sd5
2.Qf5#
1...Sf5
2.Qxf5#
1...Bd5!
Keys
1.Se6!
threat
2.Sg3#
1...exf4+
2.S6d4#
1...Kf5
2.Sg3#
1...S3xc2
2.Qxh7#
1...S3xg2
2.Qxh7#
1...Sd1
2.Qxh7#
1...Sf1
2.Qxh7#
1...Sc4
2.Qxh7#
1...Sg4
2.Qxh7#
1...Sd5
2.Qxh7#
1...Sf5
2.Sg5#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 10
REMOVED MATES = 8
Sets
Q(b);N_GUARD::QAR1(F),XP(f)
Q(b);N_GUARD::R1(H),XQ(b)
Q(b);N_GUARD::R1(H)
Q(b);N_GUARD,P_PINR(H)::QAR1(F),XP(f)
S(a);N_GUARD,XP(A)::B(E)
S(a);N_GUARD::B(E)
Tries
Try
S(B);CHECK,XQ(b)
Vars
P(d);XS(B)::QAR1(F),XP(f)
Refutation
K(e);N_SPINP(f),P-FLIGHT,XB(D)
Try
B(E);CHECK
Vars
S(c);N_GUARD,P_SPINS(c)::B(E),XS(c)
Refutation
P(g);XB(E)
Try
Q(F);N_PINP(f)
Threat
S(B)
Vars
S(c);N_GUARD,XP(A)::QAB1(F)
S(c);N_GUARD,XP(C)::QAB1(F)
P(f);OGATE,P_PINS(G),XB(D)::QAR1(F),XP(f)
S(c);N_GUARD::QAB1(F)
S(c);N_GUARD::QAB1(F),XS(c)
Refutation
B(h);
Try
Q(F);N_PINP(f)
Threat
S(B)
Vars
S(c);N_GUARD,XP(A)::QAB1(F)
S(c);N_GUARD,XP(C)::QAB1(F)
P(f);OGATE,XB(D)::QAR1(F),XP(f)
S(c);N_GUARD::QAB1(F)
S(c);N_GUARD::QAB1(F),XS(c)
Refutation
B(h);
Try
Q(F);N_PINP(f)
Threat
S(B)
Vars
S(c);N_GUARD,XP(A)::QAB1(F)
S(c);N_GUARD,XP(C)::QAB1(F)
P(f);OGATE,P_PINS(G),XB(D)::QAR1(F),XP(f)
S(c);N_GUARD::QAB1(F)
S(c);N_GUARD::QAB1(F),XS(c)
Refutation
B(h);
Try
Q(F);N_PINP(f)
Threat
S(B)
Vars
S(c);N_GUARD,XP(A)::QAB1(F)
S(c);N_GUARD,XP(C)::QAB1(F)
P(f);OGATE,P_PINS(G),XB(D)::QAR1(F),XP(f)
S(c);N_GUARD::QAB1(F)
S(c);N_GUARD::QAB1(F),XS(c)
Refutation
B(h);
Actual
S(G);N_PINP(f)
Threat
S(B)
Vars
P(f);CHECK,XB(D)::QAR(F)+S(G)
K(e);S_FLIGHT::S(B)
S(c);N_GUARD,XP(A)::QAB(F),XP(g)
S(c);N_GUARD,XP(C)::QAB(F),XP(g)
S(c);N_GUARD::QAB(F),XP(g)
S(c);SBLOCK::S(G)
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).