MESON Chess Problem Database

Problem Display
PID: 22553 (8/4N1q1/8/8/K1kb1Q2/8/8/3R4 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1986

8/4N1q1/8/8/K1kb1Q2/8/8/3R4

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qc1#
    • 1...Kc5
      • 2.Qc7#
    • 1...Qh6
      • 2.Qxd4#
    • 1...Qf8
      • 2.Qxd4#
    • 1...Qg2
      • 2.Qxd4#
    • 1...Qg3
      • 2.Qxd4#
    • 1...Qg5
      • 2.Qxd4#
    • 1...Qg6
      • 2.Qxd4#
    • 1...Qxe7
      • 2.Qxd4#
    • 1...Qf7
      • 2.Qxd4#
    • 1...Qh7
      • 2.Qxd4#
    • 1...Qg8
      • 2.Qxd4#
  • Tries
    • 1.Rxd4+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5
        • 2.Qd6#
      • 1...Qxd4!
    • 1.Qd6?
      • threat
        • 2.Qb4#
      • 1...Qxe7
        • 2.Qxd4#
      • 1...Bc3
        • 2.Qc7#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Bc5
        • 2.Qd3#
      • 1...Kc3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb4#
      • 1...Qxe7
        • 2.Qxd4#
      • 1...Bc3
        • 2.Qd5#
      • 1...Bc5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT::QAR2(C)
    • Q(c);N_GUARD::QAR1(C),XB(b)
    • Q(c);N_GUARD,XS(D)::QAR1(C),XB(b)
  • Tries
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • Q(c);P_SPINQ(c),XR(A)
    • Try
      • Q(C);N_PINB(b)
      • Threat
        • QAR1(C)
      • Vars
        • Q(c);N_GUARD,XS(D)::QAR1(C),XB(b)
        • B(b);OGATE,SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);N_PINB(b)
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • Q(c);N_GUARD,XS(D)::QAR1(C),XB(b)
      • B(b);OGATE,SBLOCK::QAB1(C)
      • B(b);SBLOCK::QAB1(C)
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).