MESON Chess Problem Database

Problem Display
PID: 138510 (8/pp6/kn3Rq1/4p2r/1B6/1PNR3p/5P2/1K1Q4 w - - 0 1)

Ellerman, Arnoldo

Nationaltidende, 1927

8/pp6/kn3Rq1/4p2r/1B6/1PNR3p/5P2/1K1Q4

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Qxd3#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qa2#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Qg1+
        • 2.Rd1#
      • 1...Qxf6
        • 2.Rd6#
      • 1...Qe8
        • 2.Rd7#
      • 1...e4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(f);CHECK,OGATE,XR(F)::QAB(B),XQ(f)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XR(F)::QAB(B),XQ(f)
      • Q(f);CHECK,N_PINR(F)::QAB(B)+R(F)
      • Q(f);N_PINR(F),N_SPINS(e),XR(H)::QAB(B)+R(F)
      • Q(f);N_PINR(F)::QAB(B)+R(F)
      • P(b);N_PINR(F)::QAB(B)+R(F)
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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).