MESON Chess Problem Database

Problem Display
PID: 138923 (6KB/1n4N1/2ppR3/7R/3k4/p2p4/6q1/2Q2Nbb w - - 0 1)

Vermester, L

Probleemblad, 1974

6KB/1n4N1/2ppR3/7R/3k4/p2p4/6q1/2Q2Nbb

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Se8#
    • 1...Qd5
      • 2.Sf5#
    • 1...Qa2
      • 2.Se8#
    • 1...Qb2
      • 2.Se8#
    • 1...Qd2
      • 2.Se8#
    • 1...Qxg7+
      • 2.Bxg7#
  • Tries
    • 1.Re4+?
      • 1...Qxe4
        • 2.Se6#
      • 1...Kxe4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sb3#
        • 2.Qa1#
        • 2.Qc4#
      • 1...Qxg7+
        • 2.Bxg7#
      • 1...Qxd2
        • 2.Se8#
      • 1...Qe4
        • 2.Sb3#
      • 1...Qg5
        • 2.Qc4#
      • 1...Qf1
        • 2.Sb3#
        • 2.Qc4#
      • 1...Qd5
        • 2.Sf5#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sc5
        • 2.Qa1#
        • 2.Qc4#
      • 1...d5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_PINS(E)::B(G)+S(E)
    • Q(c);N_PINS(E),P_PINR(D),SBLOCK::B(G)+S(E),DCHECK
    • Q(c);N_PINS(E),P_PINR(D)::B(G)+S(E)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • Q(c);N_PINS(E),SBLOCK,XR(D)::B(G)+S(E),DCHECK
      • Refutation
        • K(f);P-FLIGHT,XR(D)
  • Actual
    • S(B);
    • Threat
      • DUALS(3)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
      • Q(c);N_PINS(E),XS(B)::B(G)+S(E)
      • Q(c);N_PINS(E)::S(B)
      • Q(c);::QAR1(A)
      • Q(c);N_PINS(E),P_PINR(D),SBLOCK::B(G)+S(E),DCHECK
      • S(i);::QAB(A)
      • P(h);::S(B)
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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).