MESON Chess Problem Database

Problem Display
PID: 175945 (5bQ1/1R1p1n1r/r1kN4/3R4/p7/8/4P3/2Kb3B w - - 0 1)

Messenger, A

2nd Prize, London Transport Ty. (Busmen's Chess Review), 1960

5bQ1/1R1p1n1r/r1kN4/3R4/p7/8/4P3/2Kb3B

#2

7 + 8

1111 Busmen's Chess Review 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Rh5#
    • 1...Be7
      • 2.Qc8#
    • 1...Bg7
      • 2.Qc8#
  • Tries
    • 1.Rxd1+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Qg1#
      • 1...Rxh1!
    • 1.Rd2+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Qg1#
      • 1...Rxh1!
    • 1.Rd3+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Qg1#
      • 1...Rxh1!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qc5#
      • 1...Bh6+
        • 2.Rd2#
      • 1...Bxd6
        • 2.Rc5#
        • 2.Rh5#
      • 1...Sxd6
        • 2.Rc5#
      • 1...Ra5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(h);SBLOCK,XS(E)::B(B)+R(D)
    • B(h);OGATE::QAR2(G)
  • Tries
    • Try
      • R(D);CHECK,XB(a)
      • Refutation
        • R(g);P_PINR(D),XB(B)
    • Try
      • R(D);CHECK
      • Refutation
        • R(g);XB(B)
    • Try
      • R(D);CHECK
      • Refutation
        • R(g);XB(B)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • B(h);CHECK,S_CUTR(g)::B(B)+R(D)
      • S(f);SBLOCK,XS(E)::B(B)+R(D),DCHECK
      • R(c);N_GUARD::QAR1(G)
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).