MESON Chess Problem Database

Problem Display
PID: 139490 (1n2B3/prp2N2/qN3Q1K/2kP1R2/b1P5/P7/8/8 w - - 0 1)

Ellerman, Arnoldo

La Prensa, 1928

1n2B3/prp2N2/qN3Q1K/2kP1R2/b1P5/P7/8/8

#2

9 + 7

SOLUTION

  • SOUND
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe3#
      • 1...Qxb6+
        • 2.d6#
      • 1...Rxb6+
        • 2.d6#
      • 1...Kxb6
        • 2.c5#
      • 1...Qxc4
        • 2.Sxa4#
      • 1...axb6
        • 2.d6#
      • 1...cxb6
        • 2.d6#
      • 1...Sc6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(F);P_SPINS(E)
    • Threat
      • QAB(F)
    • Vars
      • Q(c);CHECK,SBLOCK,XS(E)::R(D)+P(C)
      • R(e);CHECK,SBLOCK,XS(E)::R(D)+P(C)
      • K(b);OGATE,S_FLIGHT,XS(E)::P(B)
      • Q(c);N_PINS(E),P_SPINQ(c),XP(B)::S(E),XB(a)
      • P(d);SBLOCK,XS(E)::R(D)+P(C)
      • P(f);SBLOCK,XS(E)::R(D)+P(C)
      • S(g);N_PINS(E)::S(E)
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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).