MESON Chess Problem Database

Problem Display
PID: 137761 (3Q4/r3P3/2pb2N1/1nN1R3/3k4/8/Bn1B3K/8 w - - 0 1)

Ellerman, Arnoldo

Dagens Nyheder, 1932

3Q4/r3P3/2pb2N1/1nN1R3/3k4/8/Bn1B3K/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Se6#
    • 1...Sa3
      • 2.Qxd6#
    • 1...Sc3
      • 2.Be3#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qg4#
      • 1...Sd3
        • 2.Se6#
      • 1...Sc3
        • 2.Be3#
      • 1...Rxd7!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh4#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Bxc5
        • 2.Re3#
      • 1...Bxe7
        • 2.Rd5#
      • 1...Sd3
        • 2.Se6#
      • 1...Sc3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::S(D)
    • S(c);N_GUARD::QAR2(H),XB(e)
    • S(c);SBLOCK::B(B)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR(H)
      • Vars
        • S(a);SBLOCK::S(D)
        • S(c);SBLOCK::B(B)
      • Refutation
        • R(f);N_SPINB(e),XQ(H)
  • Actual
    • Q(H);N_PINB(e)
    • Threat
      • QAR(H)
    • Vars
      • B(e);CHECK,OGATE,P_SPINB(e),XR(E)::QAB1(H),XB(e)
      • B(e);N_PINR(E),SBLOCK,XS(D)::QAB(H)+R(E)
      • B(e);N_PINR(E),XP(G)::QAB(H)+R(E),DCHECK
      • S(a);SBLOCK::S(D)
      • S(c);SBLOCK::B(B)
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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).