MESON Chess Problem Database

Problem Display
PID: 4927 (8/2N1Q3/5pK1/4b3/2Pk1B2/1R6/8/4N3 w - - 0 1)

Locock, Charles Dealtry

Knowledge, 1894

8/2N1Q3/5pK1/4b3/2Pk1B2/1R6/8/4N3

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qb4#
  • Tries
    • 1.Sc2+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Ke4!
    • 1.Sf3+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Ke4!
    • 1.Se6+?
      • 1...Ke4
        • 2.Re3#
        • 2.Qb7#
      • 1...Kxc4!
    • 1.Be3+?
      • 1...Kxc4
        • 2.Qb4#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kxc5!
    • 1.Qxe5+?
      • 1...Kxc4
        • 2.Qc3#
        • 2.Qd5#
      • 1...fxe5!
    • 1.Qe6?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qd5#
      • 1...Ke4!
    • 1.Qf7?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qd5#
      • 1...Ke4!
  • Keys
    • 1.Rb4!
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke4
        • 2.c5#
      • 1...Bxf4
        • 2.Sb5#
      • 1...Bxc7
        • 2.Qe3#
      • 1...Bd6
        • 2.Qe3#
      • 1...f5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(G)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINB(b)
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINB(b)
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • B(D);CHECK
      • Refutation
        • K(a);P-FLIGHT,P_SPINB(b)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK,XB(b)
      • Refutation
        • P(c);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(a);S_FLIGHT::QAR1(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINB(b)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(a);S_FLIGHT::QAR1(G)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);S_FLIGHT::S(F)
      • K(a);P-FLIGHT,P_SPINB(b)::R(B)+P(C)
      • B(b);XB(D)::S(F)
      • B(b);OGATE,XS(F)::QAB1(G)
      • B(b);OGATE::QAB1(G)
      • P(c);N_GUARD::QAB1(G),XB(b)
HTML5 logo

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).