MESON Chess Problem Database

Problem Display
PID: 234610 (8/rP2Q3/8/3N4/k1K5/8/n7/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2002

8/rP2Q3/8/3N4/k1K5/8/n7/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qa3#
    • 1...Ra5
      • 2.Sb6#
    • 1...Ra8
      • 2.bxa8Q#
      • 2.bxa8R#
    • 1...Sc1
      • 2.Qb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Sc3+?
      • 1...Sxc3
        • 2.Qb4#
      • 1...Ka5!
    • 1.Qd7+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qe8+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
  • Keys
    • 1.Qd6!
      • 1...Ka5
        • 2.Qa3#
      • 1...Rxb7
        • 2.Qa6#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Ra5
        • 2.Sb6#
      • 1...Ra6
        • 2.Qxa6#
      • 1...Ra8
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(D)
    • R(c);SBLOCK::S(B)
    • R(c);OGATE::PXR(c)=Q
    • S(a);N_GUARD::QAR1(D)
    • S(a);N_GUARD::QAR1(D),XS(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(a);XS(B)::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR2(D)
      • R(c);N_GUARD,XP(C)::QAR2(D)
      • S(a);N_GUARD::QAR1(D),XS(a)
      • R(c);SBLOCK::S(B)
      • R(c);N_GUARD::QAR2(D),XR(c)
      • R(c);OGATE::PXR(c)=Q
      • S(a);N_GUARD::QAR1(D)
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).