MESON Chess Problem Database

Problem Display
PID: 234643 (1R6/8/kP6/8/PQ6/2n5/8/K7 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

1R6/8/kP6/8/PQ6/2n5/8/K7

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qb5#
    • 1...Sd1
      • 2.Qb5#
    • 1...Sa2
      • 2.Qb5#
    • 1...Se2
      • 2.Qb5#
    • 1...Sxa4
      • 2.Qxa4#
    • 1...Se4
      • 2.Qb5#
    • 1...Sb5
      • 2.Qxb5#
      • 2.axb5#
    • 1...Sd5
      • 2.Qb5#
  • Tries
    • 1.Kb2?
      • 1...Sxa4+
        • 2.Qxa4#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sa2
        • 2.Qb5#
      • 1...Se2
        • 2.Qb5#
      • 1...Se4
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
        • 2.axb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sd1+!
    • 1.Qc5?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sd1
        • 2.Qb5#
      • 1...Sa2
        • 2.Qb5#
      • 1...Se2
        • 2.Qb5#
      • 1...Se4
        • 2.Qb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sxa4!
    • 1.Qb2?
      • 1...Ka5
        • 2.Ra8#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sd1
        • 2.Qb5#
      • 1...Sa2
        • 2.Qb5#
      • 1...Se2
        • 2.Qb5#
      • 1...Se4
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sxa4!
    • 1.Qc4+?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Ka5!
    • 1.b7?
      • threat
        • 2.Ra8#
      • 1...Ka7
        • 2.Ra8#
      • 1...Sb5!
  • Keys
    • 1.Qb3!
      • 1...Ka5
        • 2.Ra8#
      • 1...Sxa4
        • 2.Qxa4#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sd1
        • 2.Qb5#
      • 1...Sa2
        • 2.Qb5#
      • 1...Se2
        • 2.Qb5#
      • 1...Se4
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sd5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);OGATE,XP(B)::QAR2(C),XS(a)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(a);CHECK,OGATE,XP(B)::QAR2(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • S(a);XP(B)
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::R(E)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);XP(B)
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(D);
      • Threat
        • R(E)
      • Vars
        • K(b);P-FLIGHT::R1(E)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::R(E)
      • S(a);OGATE,XP(B)::QAR2(C),XS(a)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(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).