MESON Chess Problem Database

Problem Display
PID: 198873 (2b2N2/8/1n1p1p2/4k1p1/r1P5/P1P1P1N1/6BQ/BK1R4 w - - 0 1)

Jerrard, Ernest Haslam Harvey

Brisbane Courier, 1921

2b2N2/8/1n1p1p2/4k1p1/r1P5/P1P1P1N1/6BQ/BK1R4

#2

11 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4+
      • 2.cxb4#
    • 1...Bf5+
      • 2.Se4#
    • 1...Be6
      • 2.Sg6#
    • 1...Sxc4
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sd7
      • 2.Rd5#
    • 1...Sa8
      • 2.Rd5#
    • 1...f5
      • 2.Qh8#
  • Tries
    • 1.Qh7?
      • threat
        • 2.Qe4#
      • 1...Rb4+
        • 2.cxb4#
      • 1...Bf5+
        • 2.Qxf5#
      • 1...d5
        • 2.Qc7#
      • 1...f5
        • 2.Qg7#
        • 2.Qh8#
      • 1...Bb7
        • 2.Qf5#
        • 2.Qe7#
      • 1...Rxc4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Sg6#
      • 1...Rb4+
        • 2.cxb4#
      • 1...Bf5+
        • 2.Se4#
      • 1...Sxd5
        • 2.Rxd5#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(a);CHECK,OGATE::B(A)+P(G),XR(a)
    • B(g);CHECK,SBLOCK::QAB(E)+S(I)
    • B(g);SBLOCK::S(K)
    • S(d);N_GUARD,XP(J)::R1(C)
    • S(d);N_GUARD::R1(C),XS(d)
    • S(d);N_GUARD::R1(C)
    • P(f);OGATEB::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • R(a);CHECK,OGATE::B(A)+P(G),XR(a)
        • B(g);CHECK,N_GUARD::QAR1(E),XB(g)
        • P(e);OGATEB::QAB(E)
      • Refutation
        • R(a);XP(J)
  • Actual
    • B(D);
    • Threat
      • S(K)
    • Vars
      • R(a);CHECK,OGATE::B(A)+P(G),XR(a)
      • B(g);CHECK,SBLOCK::QAB(E)+S(I)
      • S(d);OGATE,XB(D)::R1(C),XS(d)
      • P(f);OGATEB::QAB(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).