MESON Chess Problem Database

Problem Display
PID: 55626 (1KR5/1P6/6B1/4B1Q1/R1NP1rp1/1Pk2p2/1p1Nn2b/3q4 w - - 0 1)

Mansfield, Comins

Comm., diagrammes, 1976

1KR5/1P6/6B1/4B1Q1/R1NP1rp1/1Pk2p2/1p1Nn2b/3q4

#2

11 + 8

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Sb1#
    • 1...Qxd2
      • 2.Sa5#
    • 1...Rxd4
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
      • 2.Qe3#
    • 1...Rf6
      • 2.Sd6#
      • 2.Qe3#
    • 1...Rf7
      • 2.Qe3#
    • 1...Rf8
      • 2.Qe3#
  • Tries
    • 1.d5+?
      • 1...Rd4
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
        • 2.Qe3#
      • 1...Sd4!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Qa5#
      • 1...Rxd4+
        • 2.Sd6#
      • 1...Re4+
        • 2.Se5#
      • 1...Rf5+
        • 2.Se5#
      • 1...Rxf6+
        • 2.Sd6#
      • 1...Qxb3
        • 2.Sb1#
      • 1...Qxd2
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD,P_PINP(I),SBLOCK,XP(B)::S(A)
    • Q(a);SBLOCK,XS(A)::R(K)+S(D)
    • R(g);OGATE,P_PINB(F)::QAR2(G)
    • R(g);OGATE,P_PINB(F),P_PINR(K)::QAR2(G)
  • Tries
    • Try
      • P(E);CHECK
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • B(F);
    • Threat
      • QAB(G)
    • Vars
      • R(g);CHECK,P_SPINR(g),XP(E)::R(K)+S(D)
      • R(g);CHECK::R(K)+S(D)
      • R(g);CHECK,XB(F)::R(K)+S(D)
      • Q(a);N_GUARD,P_PINP(I),SBLOCK,XP(B)::S(A)
      • Q(a);SBLOCK,XS(A)::R(K)+S(D)
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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).