MESON Chess Problem Database

Problem Display
PID: 140064 (1b5q/n1pRpr1p/B4p2/1r1N3K/1P4R1/3k1P2/pP2bP2/N3B2Q w - - 0 1)

Darvall, RJ

The Problemist, 1938

1b5q/n1pRpr1p/B4p2/1r1N3K/1P4R1/3k1P2/pP2bP2/N3B2Q

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qxf1#
    • 1...Bxf3
      • 2.Qxf3#
    • 1...Sc6
      • 2.Bxb5#
    • 1...Sc8
      • 2.Bxb5#
    • 1...f5
      • 2.Sf6#
    • 1...c5
      • 2.Sc7#
    • 1...e5
      • 2.Se7#
  • Keys
    • 1.Bc3!
      • threat
        • 2.Rd4#
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Bd1
        • 2.Qxd1#
      • 1...Bf1
        • 2.Qxf1#
      • 1...Sc6
        • 2.Bxb5#
      • 1...f5
        • 2.Sf6#
      • 1...c5
        • 2.Sc7#
      • 1...e5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(b);OGATEB::QAB(C),XB(b)
    • B(b);OGATE,P_PINR(H),XP(F)::QAR2(C),XB(b)
    • S(f);N_GUARD::B(K),XR(d)
    • P(e);N_PINS(I)::R(L)+S(I)
    • P(g);N_PINS(I)::R(L)+S(I)
    • P(h);N_PINS(I)::R(L)+S(I)
  • Actual
    • B(B);
    • Threat
      • R1(H)
    • Vars
      • B(b);OGATE,P_PINR(H),XP(F)::QAR2(C),XB(b)
      • B(b);N_GUARD::QAR2(C),XB(b)
      • B(b);OGATEB::QAB(C),XB(b)
      • S(f);N_GUARD::B(K),XR(d)
      • P(e);N_PINS(I)::R(L)+S(I)
      • P(g);N_PINS(I)::R(L)+S(I)
      • P(h);N_PINS(I)::R(L)+S(I)
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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).