PID: 63341 (k7/2R5/1pN5/q1P2p2/1p2p3/8/P3R3/KQ3b2 w - - 0 1)
Farnes, K
Chess, 1945
#2
7 + 7
SOLUTION
SOUND
Sets
1...Qxa2+
2.Qxa2#
1...Qb5
2.Ra7#
1...Qxc5
2.Ra7#
1...Qa7
2.Rxa7#
Tries
1.Qb2?
threat
2.Qh8#
1...Qxa2+
2.Qxa2#
1...Qxc5
2.Ra7#
1...Qa7
2.Rxa7#
1...Qa6!
1.Qb3?
threat
2.Qg8#
1...Qxa2+
2.Qxa2#
1...Qxc5
2.Ra7#
1...Qa7
2.Rxa7#
1...Qa6!
Keys
1.Qd3!
threat
2.Qd8#
1...Qxa2+
2.Rxa2#
1...exd3
2.Re8#
1...Qa6
2.Qxa6#
1...Qa7
2.Rxa7#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 1
ADDED MATES = 2
REMOVED MATES = 2
Sets
Q(d);CHECK,OGATE,XP(C)::QAR(B),XQ(d)
Q(d);N_GUARD,N_PINP(C)::R1(G)
Q(d);N_GUARD,N_PINP(C),XP(E)::R1(G)
Q(d);N_GUARD::R1(G),XQ(d)
Tries
Try
Q(B);
Threat
QAB1(B)
Vars
Q(d);CHECK,OGATE,XP(C)::QAR(B),XQ(d)
Q(d);N_GUARD,N_PINP(C),XP(E)::R1(G)
Q(d);N_GUARD::R1(G),XQ(d)
Refutation
Q(d);
Try
Q(B);
Threat
QAR(B)
Vars
Q(d);CHECK,OGATE,XP(C)::QAR(B),XQ(d)
Q(d);N_GUARD,N_PINP(C),XP(E)::R1(G)
Q(d);N_GUARD::R1(G),XQ(d)
Refutation
Q(d);
Actual
Q(B);
Threat
QAR(B)
Vars
Q(d);CHECK,OGATE,XP(C)::R(D),XQ(d)
P(c);OGATE,XQ(B)::R(D)
Q(d);N_GUARD::QAR2(B),XQ(d)
Q(d);N_GUARD::R1(G),XQ(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).