MESON Chess Problem Database

Problem Display
PID: 2573 (4N3/1n1p2R1/3q1N2/p2Pkp2/3p3K/4PrP1/2Q5/2b5 w - - 0 1)

Murphy, MJ

Source?, 0000

4N3/1n1p2R1/3q1N2/p2Pkp2/3p3K/4PrP1/2Q5/2b5

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Re7#
    • 1...Qe7
      • 2.Rxe7#
    • 1...Qb8
      • 2.Re7#
    • 1...Rf4+
      • 2.gxf4#
    • 1...dxe3
      • 2.Qc3#
    • 1...d3
      • 2.Qc3#
    • 1...f4
      • 2.Rg5#
      • 2.Qe4#
  • Tries
    • 1.Qxf5+?
      • 1...Kxf5
        • 2.Rg5#
      • 1...Rxf5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Re7#
      • 1...Rf4+
        • 2.gxf4#
      • 1...dxe3
        • 2.Qc3#
      • 1...f4
        • 2.Rg5#
      • 1...Sc5
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD::R(G)
    • Q(g);N_GUARD,P_PINS(F)::R(G),XQ(g)
    • R(b);CHECK,OGATE::P(C),XR(b)
    • P(c);OGATEB,XP(B)::QAB(A)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK,XP(f)
      • Vars
        • K(e);P-FLIGHT,XQ(A)::R1(G)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • Q(A);P_PINQ(g)
    • Threat
      • R(G)
    • Vars
      • R(b);CHECK,OGATE::P(C),XR(b)
      • P(c);OGATEB,XP(B)::QAB(A)
      • P(f);OGATEB::R(G)
      • S(h);N_GUARD::QAB1(A),XQ(g)
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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).