MESON Chess Problem Database

Problem Display
PID: 216259 (5K2/3p4/3N4/Pp2k3/1P3NpP/6p1/1P1P2Pp/Q6R w - - 0 1)

Rohner, William A

Australasian (The), 1881

5K2/3p4/3N4/Pp2k3/1P3NpP/6p1/1P1P2Pp/Q6R

#2

11 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.b3#
    • 1...Kf6
      • 2.b3#
  • Tries
    • 1.Ke7?
      • 1...Kd4
        • 2.b3#
      • 1...Kxf4!
    • 1.Re1+?
      • 1...Kd4
        • 2.Re4#
        • 2.b3#
      • 1...Kxf4
        • 2.Re4#
      • 1...Kf6
        • 2.b3#
      • 1...Kxd6!
    • 1.Qb1?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kxf4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxd6!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kxf4
        • 2.Rf1#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kxd6!
    • 1.Qa3?
      • 1...Kd4
        • 2.Qc3#
        • 2.Qe3#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Kf6
        • 2.Qc3#
      • 1...Kxd6!
    • 1.b3+?
      • 1...Kxf4
        • 2.Rf1#
        • 2.Qd4#
        • 2.Qf6#
      • 1...Kxd6!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Qc3#
        • 2.Qc5#
      • 1...Kxf4
        • 2.d4#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAB(A)+P(C)
  • Tries
    • Try
      • K(K);S_FLIGHT
      • Vars
        • K(e);S_FLIGHT::QAB(A)+P(C)
      • Refutation
        • K(e);S_FLIGHT,XS(G)
    • Try
      • R(B);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(G)::R1(B)
        • K(e);S_FLIGHT::QAB(A)+P(C)
      • Refutation
        • K(e);S_FLIGHT,XS(J)
    • Try
      • Q(A);
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT,XS(J)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT,XS(J)
    • Try
      • Q(A);
      • Vars
        • K(e);S_FLIGHT,XS(G)::QAB1(A)
        • K(e);S_FLIGHT::QAB(A)
      • Refutation
        • K(e);S_FLIGHT,XS(J)
    • Try
      • P(C);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(J)
  • Actual
    • Q(A);
    • Vars
      • K(e);S_FLIGHT,XS(G)::QAB(A)+P(D)
      • K(e);S_FLIGHT,XS(J)::QAB1(A)
      • K(e);S_FLIGHT::QAB(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).