MESON Chess Problem Database

Problem Display
PID: 198980 (6B1/B1p5/2r1p1Q1/4k2K/2P2b2/4pR2/8/8 w - - 0 1)

Cook, PB

The Observer, 1944

(First published on Sun Oct 29 1944)

6B1/B1p5/2r1p1Q1/4k2K/2P2b2/4pR2/8/8

#2

6 + 6

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxe6#
    • 1...Rxc4
      • 2.Qxe6#
  • Tries
    • 1.Bd4+?
      • 1...Kd6
        • 2.Qxe6#
      • 1...Kxd4!
    • 1.Rxe3+?
      • 1...Kd6
        • 2.Qxe6#
      • 1...Bxe3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxf4#
      • 1...Ke4
        • 2.Rxe3#
      • 1...Kd6
        • 2.Qxe6#
      • 1...Kf6
        • 2.Qg5#
      • 1...Rxc4
        • 2.Qxe6#
      • 1...Bh2
        • 2.Qd4#
      • 1...Bg3
        • 2.Qd4#
      • 1...Bg5
        • 2.Qd4#
      • 1...Bh6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINP(e),S_FLIGHT::QAR1(D),XP(e)
    • R(d);N_GUARD,XP(B)::QAR1(D),XP(e)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT::QAR1(D),XP(e)
      • Refutation
        • K(c);S_FLIGHT,XB(E)
    • Try
      • R(A);CHECK,XP(a)
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT::QAR1(D),XP(e)
      • Refutation
        • B(b);XR(A)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XB(b)
    • Vars
      • K(c);P-FLIGHT,P_SPINB(b)::R1(A),XP(a)
      • K(c);S_FLIGHT::QAR1(D),XP(e)
      • K(c);P_SPINB(b),S_FLIGHT::QAB1(D)
      • R(d);N_GUARD,XP(B)::QAR1(D),XP(e)
      • B(b);OGATE::QAB1(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).