MESON Chess Problem Database

Problem Display
PID: 146990 (1RR1Bn2/1b1q4/p4Q2/rk6/1n2N3/8/8/4B2K w - - 0 1)

Rice, John Michael

Chess, 1955

1RR1Bn2/1b1q4/p4Q2/rk6/1n2N3/8/8/4B2K

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Rc5#
  • Tries
    • 1.Bxd7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxd7!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qxb4#
      • 1...Kxb6!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ra4
        • 2.Qc5#
      • 1...Sa2
        • 2.Rxb7#
      • 1...Sc2
        • 2.Rxb7#
      • 1...Sd3
        • 2.Rxb7#
      • 1...Sd5
        • 2.Sd6#
      • 1...Sc6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R1(F)
  • Tries
    • Try
      • B(G);CHECK,XQ(f)
      • Vars
        • S(a);N_GUARD,N_PINS(C),P_SPINS(a)::QAB1(D),XS(a)
      • Refutation
        • S(g);XB(G)
    • Try
      • Q(D);CHECK,N_PINB(e)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(D),XS(a)
      • Refutation
        • K(c);N_SPINQ(f),P-FLIGHT,P_SPINB(e),XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XS(a)
    • Vars
      • K(c);N_SPINB(e),P_SPINS(a),S_FLIGHT::QAR1(D),XS(a)
      • R(b);SBLOCK::QAR1(D)
      • S(a);::R(E),XB(e)
      • S(a);N_PINS(C)::S(C)
      • S(a);N_PINS(C),N_SPINQ(f)::S(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).