MESON Chess Problem Database

Problem Display
PID: 96956 (5Q2/4p1pp/6pr/1Np1k1Nn/2P1P3/3P2r1/7B/7K w - - 0 1)

Colonelli, Hercules

Problemnoter, 1961

5Q2/4p1pp/6pr/1Np1k1Nn/2P1P3/3P2r1/7B/7K

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxg7#
    • 1...Sf6
      • 2.Qb8#
    • 1...e6
      • 2.Sf3#
  • Tries
    • 1.Qf1?
      • 1...Sf4
        • 2.Qa1#
      • 1...e6
        • 2.Sf7#
      • 1...Sf6!
    • 1.Qf3?
      • 1...Sf6
        • 2.Qxg3#
      • 1...e6
        • 2.Sf7#
      • 1...Sf4!
    • 1.Qf7?
      • threat
        • 2.Sf3#
      • 1...Sf4
        • 2.Qxg7#
      • 1...Sf6!
  • Keys
    • 1.Qf2!
      • 1...Sf4
        • 2.Qb2#
      • 1...Sf6
        • 2.Qxg3#
      • 1...e6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,N_SPINR(a),P_PINB(B),SBLOCK::QAB(H),XP(h)
    • S(d);P_PINB(B),SBLOCK::QAB(H)
    • P(g);SBLOCK::S(G)
  • Tries
    • Try
      • Q(H);
      • Vars
        • S(d);N_SPINR(a),P_PINB(B),SBLOCK::QAB(H)
        • P(g);SBLOCK::S(G)
      • Refutation
        • S(d);P_PINB(B)
    • Try
      • Q(H);
      • Vars
        • S(d);N_GUARD,P_PINB(B),SBLOCK::QAB(H),XR(a)
        • P(g);SBLOCK::S(G)
      • Refutation
        • S(d);N_SPINR(a),P_PINB(B)
    • Try
      • Q(H);
      • Threat
        • S(G)
      • Vars
        • S(d);N_GUARD,N_SPINR(a),P_PINB(B),SBLOCK::QAB(H),XP(h)
      • Refutation
        • S(d);P_PINB(B)
  • Actual
    • Q(H);
    • Vars
      • S(d);N_SPINR(a),P_PINB(B),SBLOCK::QAB(H)
      • S(d);N_GUARD,P_PINB(B),SBLOCK::QAB(H),XR(a)
      • P(g);SBLOCK::S(G)
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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).