MESON Chess Problem Database

Problem Display
PID: 54794 (r3k2r/1p1ppn1R/3B4/8/B7/7Q/8/4K3 w qk - 0 1)

Degenkolbe, Mirko

Troll, 1991

r3k2r/1p1ppn1R/3B4/8/B7/7Q/8/4K3

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qxd7#
    • 1...Rf8
      • 2.Qxd7#
    • 1...e5
      • 2.Qxd7#
    • 1...0-0-0
      • 2.Qc3#
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Qg6#
      • 1...0-0-0
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(f);N_SPINP(b),P-FLIGHT::QAR1(B),XP(b)
    • R(g);SBLOCK::QAB1(B),XP(b)
    • P(c);::QAB1(B),XP(b)
    • K(f);0-0-0,OGATEB::QAR(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • K(f);N_SPINP(b),P-FLIGHT::QAR1(B),XP(b)
      • K(f);N_SPINP(b),P-FLIGHT,P_SPINP(c)::QAR1(B),XS(d)
      • K(f);0-0,N_SPINP(b),OGATEB,P_SPINS(d)::QAR2(B)
      • K(f);0-0-0,OGATEB::QAR(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).