MESON Chess Problem Database

Problem Display
PID: 159711 (1B2R1K1/3k1PN1/7R/6pQ/1n6/b1prp3/b1pq2r1/1n6 w - - 0 1)

Anonymous

BCPJ (June), 1919

1B2R1K1/3k1PN1/7R/6pQ/1n6/b1prp3/b1pq2r1/1n6

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.f8S#
    • 1...Bd5
      • 2.Rd6#
    • 1...Bxf7+
      • 2.Qxf7#
  • Tries
    • 1.Qg4+?
      • 1...Be6
        • 2.Qxe6#
      • 1...Rxg4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qb7#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Rd5
        • 2.f8S#
      • 1...Bd5
        • 2.Rd6#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(h);N_PINP(C)::P=S
    • B(b);S_CUTR(h)::R1(B)
    • B(b);CHECK,OGATE,XP(C)::QAR2(A),XB(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAB1(A),XB(b)
      • Refutation
        • R(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • B(b);CHECK,OGATE,XP(C)::QAR2(A),XB(b)
      • R(h);N_PINP(C)::P=S
      • B(b);S_CUTR(h)::R1(B)
      • S(j);N_PINP(C),S_CUTB(b)::QAB(A)
      • S(j);N_GUARD::QAB1(A)
      • S(j);N_GUARD::QAB1(A),XS(j)
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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).