MESON Chess Problem Database

Problem Display
PID: 4701 (4K3/4B3/4B3/3pk1p1/1P2pRP1/6Q1/8/8 w - - 0 1)

Dod, Anthony

Liverpool Courier, 1887

4K3/4B3/4B3/3pk1p1/1P2pRP1/6Q1/8/8

#2

7 + 4

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Rf6#
    • 1...e3
      • 2.Qxe3#
    • 1...d4
      • 2.Rf6#
  • Tries
    • 1.Rf1+?
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Rf2+?
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Rf3+?
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Rf5+?
      • 1...Kxe6
        • 2.Re5#
        • 2.Rf6#
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Rf7+?
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Rf8+?
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qc3+?
      • 1...Kxf4
        • 2.Bd6#
      • 1...Kxe6
        • 2.Rf6#
        • 2.Qf6#
      • 1...d4!
  • Keys
    • 1.Qb3!
      • 1...Kd4
        • 2.Bf6#
      • 1...Kxf4
        • 2.Bd6#
      • 1...Kxe6
        • 2.Rxe4#
      • 1...gxf4
        • 2.Qxd5#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XB(E)::R1(C)
    • P(a);OGATEB::QAR2(A),XP(a)
    • P(b);SBLOCK::QAB(A)+R(C)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(C)::B(F)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::B(F)
      • K(c);S_FLIGHT,XR(C)::B(F)
      • K(c);P-FLIGHT,P_SPINP(b),XB(E)::R(C),XP(a)
      • P(d);SBLOCK,XR(C)::QAR1(A),XP(b)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(b);SBLOCK::R1(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).