MESON Chess Problem Database

Problem Display
PID: 16520 (2B5/8/4b3/Q3p3/5k2/8/5KR1/8 w - - 0 1)

Holroyd Smyth, Mrs A

Chess, 1941

2B5/8/4b3/Q3p3/5k2/8/5KR1/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Rg4#
    • 1...Bb3
      • 2.Rg4#
    • 1...Bc4
      • 2.Rg4#
    • 1...Bg4
      • 2.Rxg4#
    • 1...Bd5
      • 2.Rg4#
    • 1...Bf7
      • 2.Rg4#
    • 1...Bg8
      • 2.Rg4#
    • 1...e4
      • 2.Qg5#
  • Tries
    • 1.Qa8?
      • threat
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf3#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Bd5
        • 2.Rg4#
      • 1...e4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf3#
      • 1...Bxd5
        • 2.Rg4#
      • 1...e4
        • 2.Qg5#
      • 1...Bg4
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(c);N_GUARD::R1(B)
    • B(c);N_GUARD::R1(B),XB(c)
    • P(b);OGATE,SBLOCK::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT,P_SPINB(c)::QAR2(C)
        • B(c);N_GUARD::R1(B),XB(c)
        • B(c);N_GUARD::R1(B)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT,P_SPINB(c),P_SPINP(b)::QAR2(C)
      • B(c);N_GUARD,XQ(C)::R1(B)
      • P(b);OGATE,SBLOCK::QAB1(C)
      • B(c);N_GUARD::R1(B),XB(c)
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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).