MESON Chess Problem Database

Problem Display
PID: 18503 (R1R5/1N2B3/4K3/8/P2p4/1k1p4/pnbP4/b1Q5 w - - 0 1)

Mansfield, Comins

3rd Prize, El Ajedrez Espanol, 1956

R1R5/1N2B3/4K3/8/P2p4/1k1p4/pnbP4/b1Q5

#2

8 + 7

3976 FIDE Album (1956-1958) 1961
3550 Complete Mansfield/II 1997
133 The Problemist Supplement 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qa3#
    • 1...Sxa4
      • 2.Sa5#
      • 2.Qa3#
  • Tries
    • 1.Sd8?
      • 1...Sxa4
        • 2.Qa3#
      • 1...Bb1
        • 2.Rcb8#
      • 1...Bd1
        • 2.Rcb8#
      • 1...Sd1
        • 2.Qa3#
      • 1...Sc4!
    • 1.Rc4?
      • threat
        • 2.Sa5#
      • 1...Kxc4
        • 2.Sa5#
      • 1...Sxc4!
    • 1.Rc6?
      • 1...Sxa4
        • 2.Sa5#
        • 2.Qa3#
      • 1...Bb1
        • 2.Rb6#
      • 1...Bd1
        • 2.Rb6#
      • 1...Sd1
        • 2.Qa3#
      • 1...Sc4!
  • Keys
    • 1.Rcb8!
      • 1...Kc4
        • 2.Sa5#
      • 1...Sxa4
        • 2.Sa5#
      • 1...Bb1
        • 2.Sd8#
      • 1...Bd1
        • 2.Sd8#
      • 1...Sd1
        • 2.Sd6#
      • 1...Sc4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE::QAR1(A)
  • Tries
    • Try
      • S(E);
      • Vars
        • S(c);OGATE,XP(C)::QAR1(A)
        • B(d);::R(H)
        • S(c);OGATE::QAR1(A)
      • Refutation
        • S(c);
    • Try
      • R(H);
      • Threat
        • S(E)
      • Vars
        • K(e);P_SPINB(d),S_FLIGHT,XR(H)::S(E)
      • Refutation
        • S(c);XR(H)
    • Try
      • R(H);
      • Vars
        • B(d);::R(H)
        • S(c);OGATE::QAR1(A)
      • Refutation
        • S(c);
  • Actual
    • R(H);
    • Vars
      • K(e);P_SPINB(d),S_FLIGHT::S(E)
      • S(c);SBLOCK,XP(C)::R(H)+S(E),DCHECK
      • B(d);::R(H)+S(E)
      • S(c);::R(H)+S(E)
      • S(c);SBLOCK::R(H)+S(E),DCHECK
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).