MESON Chess Problem Database

Problem Display
PID: 137771 (K6N/pQ6/5p1P/2p2kpB/r1r3N1/p3RbP1/8/b4Rnq w - - 0 1)

Ellerman, Arnoldo

2nd HM., Neue Leipziger Zeitung, 1931

K6N/pQ6/5p1P/2p2kpB/r1r3N1/p3RbP1/8/b4Rnq

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Qd5#
    • 1...Rxg4
      • 2.Bg6#
    • 1...Bd4
      • 2.Qe4#
  • Tries
    • 1.Rfxf3+?
      • 1...Rf4
        • 2.Qc8#
        • 2.Qd7#
        • 2.Qh7#
      • 1...Sxf3
        • 2.Qc8#
        • 2.Qd7#
        • 2.Qh7#
      • 1...Qxf3!
    • 1.Re7?
      • threat
        • 2.Se3#
      • 1...Rxg4
        • 2.Bg6#
      • 1...Rc3
        • 2.Qd5#
      • 1...Bd4
        • 2.Qe4#
      • 1...Re4!
  • Keys
    • 1.Re8!
      • threat
        • 2.Se3#
      • 1...Rxg4
        • 2.Bg6#
      • 1...Rc3
        • 2.Qd5#
      • 1...Re4
        • 2.Qh7#
      • 1...Bd4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(g);S_CUTB(a)::QAR2(G)
    • R(g);SBLOCK,XS(D)::B(E)
    • B(a);S_CUTR(g)::QAB1(G)
  • Tries
    • Try
      • R(A);CHECK,N_SPINQ(G),XB(e)
      • Refutation
        • Q(c);P_PINQ(G),XR(A)
    • Try
      • R(B);
      • Threat
        • S(D)
      • Vars
        • R(g);SBLOCK,XS(D)::B(E)
        • R(g);S_CUTB(a)::QAR2(G)
        • B(a);S_CUTR(g)::QAB1(G)
      • Refutation
        • R(g);N_PINQ(G)
  • Actual
    • R(B);
    • Threat
      • S(D)
    • Vars
      • R(g);SBLOCK,XS(D)::B(E)
      • R(g);S_CUTB(a)::QAR2(G)
      • R(g);N_PINQ(G)::QAB(G)
      • B(a);S_CUTR(g)::QAB1(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).