MESON Chess Problem Database

Problem Display
PID: 223380 (8/6K1/2pp4/8/2pkpN1Q/2R5/1R6/8 w - - 0 1)

Flagg, John O

The Nashville Union, 1885

8/6K1/2pp4/8/2pkpN1Q/2R5/1R6/8

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc3
      • 2.Qf6#
    • 1...Ke5
      • 2.Qf6#
    • 1...c5
      • 2.Qf6#
  • Tries
    • 1.Rxc4+?
      • 1...Ke3
        • 2.Qf2#
        • 2.Qg3#
      • 1...Ke5
        • 2.Qg5#
        • 2.Qf6#
      • 1...Kxc4!
    • 1.Qf2+?
      • 1...Kxc3
        • 2.Qd2#
      • 1...e3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Qe7!
      • 1...Kxc3
        • 2.Qf6#
      • 1...Kc5
        • 2.Qa7#
      • 1...c5
        • 2.Qf6#
      • 1...e3
        • 2.Qxe3#
      • 1...d5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT,XR(B)::QAB(D)
    • K(b);S_FLIGHT::QAB1(D)
    • P(d);SBLOCK::QAB(D)
  • Tries
    • Try
      • R(B);CHECK,XP(a)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAB1(D)
        • P(c);P_SPINP(c)::QAB1(D),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(b);S_FLIGHT,XR(B)::QAB(D)
      • K(b);P_SPINP(a),S_FLIGHT::QAB(D)
      • P(d);SBLOCK::QAB(D)
      • P(c);OGATE::QAB1(D),XP(c)
      • P(e);SBLOCK::S(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).