MESON Chess Problem Database

Problem Display
PID: 143335 (q5B1/1QP3P1/2R1P3/8/3P4/8/5P1p/5K1k w - - 0 1)

Lipton, Michael

The Problemist, 2011

q5B1/1QP3P1/2R1P3/8/3P4/8/5P1p/5K1k

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1+
      • 2.Rc1#
    • 1...Qa2
      • 2.Rc4#
    • 1...Qa3
      • 2.Rc3#
    • 1...Qa5
      • 2.Rc5#
    • 1...Qa6+
      • 2.Rxa6#
    • 1...Qd8
      • 2.Rd6#
    • 1...Qxg8
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Rc4#
      • 2.Rc5#
      • 2.Ra6#
      • 2.Rb6#
      • 2.Rd6#
  • Tries
    • 1.Bh7?
      • threat
        • 2.Be4#
      • 1...Qa1+
        • 2.Rc1#
      • 1...Qa6+
        • 2.Rxa6#
      • 1...Qa3
        • 2.Rc3#
      • 1...Qf8!
  • Keys
    • 1.e7!
      • threat
        • 2.Bd5#
      • 1...Qa1+
        • 2.Rc1#
      • 1...Qa6+
        • 2.Rxa6#
      • 1...Qxg8
        • 2.Re6#
      • 1...Qa2
        • 2.Rc4#
      • 1...Qa3
        • 2.Rc3#
      • 1...Qa5
        • 2.Rc5#
      • 1...Qd8
        • 2.Rd6#
      • 1...Qf8
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,N_GUARD::QAB(F)+R(D)
    • Q(c);N_GUARD,SBLOCK::QAB(F)+R(D)
    • Q(c);N_GUARD::QAB(F)+R(D)
    • Q(c);CHECK,N_GUARD::QAB(F)+R(D),XQ(c)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(I)
      • Vars
        • Q(c);CHECK,N_GUARD::QAB(F)+R(D)
        • Q(c);CHECK,N_GUARD::QAB(F)+R(D),XQ(c)
        • Q(c);N_GUARD::QAB(F)+R(D)
      • Refutation
        • Q(c);P_PINP(B)
  • Actual
    • P(E);
    • Threat
      • B(I)
    • Vars
      • Q(c);CHECK,N_GUARD::QAB(F)+R(D)
      • Q(c);CHECK,N_GUARD::QAB(F)+R(D),XQ(c)
      • Q(c);N_GUARD,XB(I)::QAB(F)+R(D)
      • Q(c);N_GUARD,SBLOCK::QAB(F)+R(D)
      • Q(c);N_GUARD::QAB(F)+R(D)
      • Q(c);N_GUARD,P_PINP(B)::QAB(F)+R(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).