MESON Chess Problem Database

Problem Display
PID: 58861 (R3B3/8/8/2N5/1kp5/rq3QK1/1Rr3n1/4n1Bb w - - 0 1)

Ellerman, Arnoldo

4th HM., Brisbane Courier, 1921

R3B3/8/8/2N5/1kp5/rq3QK1/1Rr3n1/4n1Bb

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Rxa4#
    • 1...c3
      • 2.Qe4#
  • Tries
    • 1.Rxb3+?
      • 1...Rxb3
        • 2.Ra4#
      • 1...cxb3!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Bc5#
      • 1...Rxa4
        • 2.Rxa4#
      • 1...c3
        • 2.Qe4#
      • 1...Rf2
        • 2.Qc3#
      • 1...Sd3
        • 2.Qb7#
      • 1...Se3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD::R1(F),XR(e)
    • P(h);N_PINQ(C),SBLOCK::QAR(C)
  • Tries
    • Try
      • R(B);CHECK,N_SPINQ(C),XQ(f)
      • Vars
        • R(e);P_PINQ(C),XR(B)::R1(F)
      • Refutation
        • P(h);XR(B)
  • Actual
    • S(E);
    • Threat
      • B(A)
    • Vars
      • R(e);OGATE,XS(E)::R1(F),XR(e)
      • P(h);N_PINQ(C)::QAR(C)
      • R(c);N_GUARD::QAB1(C)
      • S(a);N_PINQ(C)::QAR(C)
      • S(d);N_PINQ(C)::QAB(C)
HTML5 logo

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).