MESON Chess Problem Database

Problem Display
PID: 23184 (1N6/8/K7/8/kp1N4/3r4/1Q6/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

1N6/8/K7/8/kp1N4/3r4/1Q6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qa2#
      • 2.Qb3#
    • 1...Rd2
      • 2.Qb3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Rxd4
      • 2.Qa2#
  • Tries
    • 1.Sdc6?
      • threat
        • 2.Qxb4#
      • 1...Rd4
        • 2.Qa2#
      • 1...b3
        • 2.Qa1#
      • 1...Rb3!
    • 1.Sd7?
      • threat
        • 2.Sc5#
        • 2.Sb6#
      • 1...Rc3
        • 2.Sb6#
      • 1...b3!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Sb5#
      • 1...Rb3
        • 2.Qxb3#
      • 1...b3!
  • Keys
    • 1.Sbc6!
      • threat
        • 2.Qxb4#
      • 1...Rxd4
        • 2.Qa2#
      • 1...Rb3
        • 2.Qxb3#
      • 1...b3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • R(a);N_GUARD,XS(B)::QAR2(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • R(a);N_GUARD::QAR2(A)
        • P(c);SBLOCK,S_CUTR(a)::QAR(A)
      • Refutation
        • R(a);
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(D)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • S(D);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • R(a);N_GUARD,XS(B)::QAR2(A)
      • R(a);N_GUARD::QAB1(A),XR(a)
      • P(c);S_CUTR(a)::QAR(A)
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).