MESON Chess Problem Database

Problem Display
PID: 39555 (2nR2b1/2R3n1/B2b4/6p1/1B1krQ2/2N4p/5P1K/8 w - - 0 1)

Eerkes, Allard Pieter

Recomm., BCF 022. Ty., 1936-1937

2nR2b1/2R3n1/B2b4/6p1/1B1krQ2/2N4p/5P1K/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Se2#
  • Tries
    • 1.Rxd6+?
      • 1...Bd5
        • 2.Se2#
        • 2.Rxd5#
        • 2.Qxe4#
      • 1...Sxd6!
    • 1.Qxd6+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sxd6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Bc5#
      • 1...Rf4
        • 2.Qe3#
      • 1...Re3
        • 2.fxe3#
      • 1...Re5
        • 2.Qd3#
      • 1...Bd5
        • 2.Sb5#
      • 1...Se6
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(h);N_SPINB(e),SBLOCK::S(C)
  • Tries
    • Try
      • R(H);CHECK,N_SPINQ(E),XB(e)
      • Refutation
        • S(g);XR(H)
    • Try
      • Q(E);CHECK,N_PINR(c),N_SPINQ(E),XB(e)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(E),XB(h)
      • Refutation
        • S(g);P_SPINS(g),XQ(E)
  • Actual
    • Q(E);N_PINR(c)
    • Threat
      • B(D)
    • Vars
      • R(c);N_PINQ(E)::QAB1(E)
      • R(c);OGATE::P(A),XR(c)
      • R(c);N_PINQ(E),SBLOCK::QAR1(E)
      • B(h);N_SPINB(e),SBLOCK::S(C)
      • S(f);S_CUTB(h)::R1(G)
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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).