MESON Chess Problem Database

Problem Display
PID: 139484 (1BN5/5p1b/2P1kp1K/Q6p/1N1P1n2/7p/7q/3r1R2 w - - 0 1)

Ellerman, Arnoldo

Il Problema, 1934

1BN5/5p1b/2P1kp1K/Q6p/1N1P1n2/7p/7q/3r1R2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qa2#
      • 2.Qd5#
    • 1...Sg2
      • 2.Qa2#
      • 2.Qd5#
    • 1...Sd3
      • 2.Qd5#
      • 2.d5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sg6
      • 2.Qd5#
      • 2.Qf5#
    • 1...f5
      • 2.Qe5#
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sc7#
      • 1...f5
        • 2.Qe5#
      • 1...Se2
        • 2.Qa2#
      • 1...Sg2
        • 2.Qa2#
      • 1...Sd3
        • 2.d5#
      • 1...Sd5
        • 2.Sc5#
      • 1...Sg6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::QAB1(D),XS(d)
    • P(g);N_GUARD::QAR1(D)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • P(g);N_GUARD::QAR1(D)
      • S(d);N_GUARD,S_CUTQ(b)::QAB(D)
      • S(d);N_GUARD,S_CUTR(a)::P(C)
      • S(d);SBLOCK::S(B)
      • S(d);S_CUTB(i)::QAB1(D)
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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).