MESON Chess Problem Database

Problem Display
PID: 55630 (R7/7K/8/b4R2/b7/8/k1P5/N1Q5 w - - 0 1)

Howard, Kenneth Samuel

Falkirk Herald, 1925

R7/7K/8/b4R2/b7/8/k1P5/N1Q5

#2

6 + 3

5089 The Enjoyment of Chess Problems 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Rxa4#
    • 1...Bd2
      • 2.Rxa4#
    • 1...Bc3
      • 2.Rxa4#
    • 1...Bb6
      • 2.Rxa4#
    • 1...Bc7
      • 2.Rxa4#
    • 1...Bd8
      • 2.Rxa4#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qa1#
      • 1...Bc3
        • 2.Rxa4#
      • 1...Bxb3!
  • Keys
    • 1.Rf2!
      • 1...Bxc2+
        • 2.Rxc2#
      • 1...Bb3
        • 2.cxb3#
      • 1...Bb5
        • 2.c4#
      • 1...Bc6
        • 2.c3#
        • 2.c4#
      • 1...Bd7
        • 2.c3#
        • 2.c4#
      • 1...Be8
        • 2.c3#
        • 2.c4#
      • 1...Be1
        • 2.Rxa4#
      • 1...Bd2
        • 2.Rxa4#
      • 1...Bc3
        • 2.Rxa4#
      • 1...Bb4
        • 2.c3#
      • 1...Bb6
        • 2.Rxa4#
      • 1...Bc7
        • 2.Rxa4#
        • 2.c3#
        • 2.c4#
      • 1...Bd8
        • 2.Rxa4#
        • 2.c3#
        • 2.c4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(c);OGATE,P_SPINB(b)::R(F),XB(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Vars
        • B(c);OGATE,P_SPINB(b)::R(F),XB(b)
      • Refutation
        • B(b);P_SPINB(c),XS(A)
  • Actual
    • R(D);
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XP(C)::R(D),XB(b)
      • B(b);OGATE,P_SPINB(c)::R(D)+P(C),XB(b)
      • B(b);N_GUARD,P_SPINB(c)::R(D)+P(C)
      • B(c);OGATE,P_SPINB(b)::R(F),XB(b)
      • B(c);P_SPINB(b)::R(D)+P(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).