MESON Chess Problem Database

Problem Display
PID: 247461 (8/3B1PK1/1q3p2/6kp/4nRPr/2p1B1pr/3pN3/1b4b1 w - - 0 1)

Boswell, Edward

Caine, Walter Edmund

British Chess Magazine, 1931

8/3B1PK1/1q3p2/6kp/4nRPr/2p1B1pr/3pN3/1b4b1

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Rf2#
    • 1...Qd8
      • 2.Rf2#
    • 1...Qb2
      • 2.Rf2#
    • 1...Qb3
      • 2.Rf2#
    • 1...Qb4
      • 2.Rf2#
    • 1...Qb5
      • 2.Rf2#
    • 1...Qa6
      • 2.Rf2#
    • 1...Qc6
      • 2.Rf2#
    • 1...Qb7
      • 2.Rf2#
    • 1...Rxg4
      • 2.Rxg4#
    • 1...Sf2
      • 2.Rd4#
    • 1...Sc5
      • 2.Rf2#
    • 1...hxg4
      • 2.Rf5#
  • Tries
    • 1.Rxf6+?
      • 1...Qxe3
        • 2.Rg6#
      • 1...Bxe3!
  • Keys
    • 1.f8S!
      • threat
        • 2.Sh7#
      • 1...Rxg4
        • 2.Rxg4#
      • 1...hxg4
        • 2.Rf5#
      • 1...Sf2
        • 2.Rd4#
      • 1...Sc5
        • 2.Rf2#
      • 1...Sd6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(k);N_GUARD::B(B)+R(C)
    • R(h);OGATE,XP(D)::B(B)+R(C),DCHECK,XR(h)
    • S(g);OGATE::B(B)+R(C)
    • S(g);S_CUTQ(k)::B(B)+R(C)
    • P(j);SBLOCK,XP(D)::B(B)+R(C),DCHECK
  • Tries
    • Try
      • R(C);CHECK,XP(l)
      • Vars
        • Q(k);XB(B)::R1(C)
      • Refutation
        • B(b);XB(B)
  • Actual
    • P(F);
    • Threat
      • S(F)
    • Vars
      • R(h);OGATE,XP(D)::B(B)+R(C),DCHECK,XR(h)
      • P(j);SBLOCK,XP(D)::B(B)+R(C),DCHECK
      • S(g);OGATE::B(B)+R(C)
      • S(g);S_CUTQ(k)::B(B)+R(C)
      • S(g);S_CUTQ(k)::S(F)
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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).