MESON Chess Problem Database

Problem Display
PID: 101449 (k4q2/1R3n2/2Bp4/8/3B2Q1/K5pr/8/7b w - - 0 1)

Sparke, Arthur M

Good Companions, 1921

k4q2/1R3n2/2Bp4/8/3B2Q1/K5pr/8/7b

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Qc8#
    • 1...Qe7
      • 2.Qc8#
    • 1...Qg7
      • 2.Qc8#
    • 1...Qb8
      • 2.Ra7#
    • 1...Qc8
      • 2.Qxc8#
    • 1...Sd8
      • 2.Qc8#
    • 1...g2+
      • 2.Rb3#
    • 1...d5+
      • 2.Rb4#
  • Tries
    • 1.Rb6+?
      • 1...Ka7
        • 2.Qd7#
      • 1...Bxc6!
    • 1.Re7+?
      • 1...Kb8
        • 2.Ba7#
      • 1...Bxc6!
    • 1.Rxf7+?
      • 1...Kb8
        • 2.Ba7#
      • 1...Bxc6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qa6#
      • 1...g2+
        • 2.Rb3#
      • 1...d5+
        • 2.Rb4#
      • 1...Qb8
        • 2.Ra7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD,SBLOCK::QAR2(C)
    • Q(g);N_GUARD::QAR2(C)
    • Q(g);SBLOCK::B(D)+R(E),DCHECK
    • Q(g);N_GUARD::QAR2(C),XQ(g)
    • S(e);S_CUTQ(g)::QAR2(C)
    • P(b);CHECK,S_CUTB(a)::B(D)+R(E)
    • P(d);CHECK,S_CUTB(a)::B(D)+R(E)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR(C)
      • Refutation
        • B(a);XB(D)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT::B(B)
      • Refutation
        • B(a);XB(D)
    • Try
      • R(E);CHECK,XS(e)
      • Vars
        • K(f);P-FLIGHT::B(B)
      • Refutation
        • B(a);XB(D)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • P(b);CHECK,S_CUTB(a)::B(D)+R(E)
      • P(d);CHECK,S_CUTB(a)::B(D)+R(E)
      • Q(g);SBLOCK::B(D)+R(E),DCHECK
HTML5 logo

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).