MESON Chess Problem Database

Problem Display
PID: 18193 (Q6K/R6p/3pkprN/8/1b3qP1/3N3B/8/8 w - - 0 1)

Mansfield, Comins

American Chess Bulletin, 1954

Q6K/R6p/3pkprN/8/1b3qP1/3N3B/8/8

#2

7 + 7

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qe4#
    • 1...Qd2
      • 2.Qe4#
    • 1...Qxh6
      • 2.Qe4#
    • 1...Qf1
      • 2.Qe4#
    • 1...Qf2
      • 2.Qe4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qxg4
      • 2.Qe4#
    • 1...Qf5
      • 2.gxf5#
    • 1...Rxg4
      • 2.Qg8#
    • 1...Rxh6
      • 2.Qg8#
    • 1...Rg8+
      • 2.Qxg8#
  • Tries
    • 1.Qe4+?
      • 1...Qe5
        • 2.Sf4#
      • 1...Qxe4!
    • 1.g5+?
      • 1...Qg4
        • 2.Qe4#
      • 1...Qf5
        • 2.Bxf5#
        • 2.Qe4#
      • 1...f5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Re7#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Qxg4
        • 2.Sd4#
      • 1...Qxf5
        • 2.gxf5#
      • 1...Rxg4
        • 2.Sg7#
      • 1...Rg7
        • 2.Sxg7#
      • 1...d5
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::QAR2(F)
    • Q(b);N_GUARD,XS(D)::QAR2(F)
    • Q(b);N_GUARD::QAR2(F),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XP(C)::QAR2(F)
    • Q(b);OGATE::P(C),XQ(b)
    • R(f);N_GUARD,P_SPINR(f),XP(C)::QAB(F)
    • R(f);N_GUARD,XS(D)::QAB(F)
    • R(f);CHECK,N_GUARD::QAB(F),XR(f)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::S(A)
      • Refutation
        • Q(b);XQ(F)
    • Try
      • P(C);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAR2(F)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • R(f);CHECK,N_GUARD::QAB(F),XR(f)
      • Q(b);N_GUARD,XP(C)::S(D)
      • Q(b);OGATE,XS(D)::P(C),XQ(b)
      • R(f);N_GUARD,XP(C)::S(D)
      • R(f);N_GUARD::S(D),XR(f)
      • P(c);SBLOCK::QAB(F)
HTML5 logo

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).