MESON Chess Problem Database

Problem Display
PID: 6909 (8/1n6/8/1p5Q/3K1B2/5P2/2R2pN1/N2krr2 w - - 0 1)

Blaine, Harry (Harley, Brian)

Social Chess Quarterly (The), 1934

8/1n6/8/1p5Q/3K1B2/5P2/2R2pN1/N2krr2

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Rc1#
    • 1...Re4+
      • 2.fxe4#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Rc1#
        • 2.Qd3#
        • 2.Qb1#
      • 1...Re3
        • 2.Qb1#
      • 1...Re2
        • 2.Rc1#
        • 2.Qxe2#
        • 2.Qb1#
      • 1...Sc5
        • 2.Rc1#
        • 2.Qb1#
      • 1...Re4+!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Kc3#
      • 1...Re4+
        • 2.Kxe4#
      • 1...Re3
        • 2.Kxe3#
      • 1...Re2
        • 2.Rc1#
      • 1...Re5
        • 2.Kxe5#
      • 1...Sc5
        • 2.Kxc5#
      • 1...b4
        • 2.Kc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R1(B)
    • R(b);CHECK,OGATE::QAB(G)+P(D),XR(b)
  • Tries
    • Try
      • Q(G);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::QAR2(G)
      • Refutation
        • R(b);CHECK
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+K(E)
    • Vars
      • R(b);CHECK::QAR(G)+K(E),XR(b)
      • R(b);::QAR(G)+K(E),XR(b)
      • R(b);SBLOCK::R1(B)
      • S(f);::QAR(G)+K(E),XS(f)
      • P(e);::QAR(G)+K(E)
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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).