MESON Chess Problem Database

Problem Display
PID: 247679 (8/2r3p1/2p1p1K1/1np1kp2/r3N3/8/4Q1b1/2BRR3 w - - 0 1)

Braithwaite, Kenneth Holmes

The Problemist, 1990

8/2r3p1/2p1p1K1/1np1kp2/r3N3/8/4Q1b1/2BRR3

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qh5#
    • 1...f4
      • 2.Qh5#
  • Tries
    • 1.Sg5+?
      • 1...Be4
        • 2.Sf3#
      • 1...Re4!
    • 1.Sd6+?
      • 1...Re4
        • 2.Sc4#
      • 1...Be4!
  • Keys
    • 1.Sd2+!
      • 1...Kd4
        • 2.Sb1#
      • 1...Kf4
        • 2.Sf1#
      • 1...Kd5
        • 2.Qe5#
      • 1...Kd6
        • 2.Qxe6#
      • 1...Re4
        • 2.Sc4#
      • 1...Be4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • P(f);OGATEB,P_SPINP(f),XS(E)::QAR(D)
    • P(f);OGATEB::QAR(D)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(a);P_SPINB(a)::S(E)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • S(E);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(E)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(E);CHECK
    • Vars
      • K(e);S_FLIGHT::R(B)+S(E)
      • K(e);S_FLIGHT::B(A)+S(E)
      • K(e);P-FLIGHT::QAR1(D)
      • K(e);OGATE,S_FLIGHT::QAR1(D),XP(h)
      • R(b);P_SPINR(b)::S(E)
      • B(a);P_SPINB(a)::S(E)
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).