MESON Chess Problem Database

Problem Display
PID: 21750 (b4B2/2pp4/1q3p2/p1rk4/1b1N4/1ppp1N2/B7/4R1KQ w - - 0 1)

Mansfield, Comins

3rd Prize, Brisbane Courier, 1922

b4B2/2pp4/1q3p2/p1rk4/1b1N4/1ppp1N2/B7/4R1KQ

#2

7 + 12

3360 Simple Two-move Themes 1924
4797 A Genius of the Two-mover 1936
21 Deutsche Schachblatter 1962
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Bxb3#
    • 1...Rb5
      • 2.Bxb3#
  • Tries
    • 1.Re5+?
      • 1...Kc4
        • 2.Bxb3#
      • 1...fxe5!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Bxb3#
      • 1...f5!
  • Keys
    • 1.Sxb3!
      • threat
        • 2.Sfd2#
      • 1...Rc4+
        • 2.Sfd4#
      • 1...Rb5+
        • 2.Sbd4#
      • 1...Rc6+
        • 2.Sc5#
      • 1...Kc4
        • 2.Sbd4#
      • 1...Kc6
        • 2.Sfd4#
      • 1...Qe6
        • 2.Se5#
      • 1...d2
        • 2.Sfxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::B(D),XP(a)
    • R(f);N_GUARD,P_PINS(F)::B(D),XP(a)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(g);S_FLIGHT::B(D),XP(a)
      • Refutation
        • P(i);XR(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);S_FLIGHT::B(D),XP(a)
      • Refutation
        • P(i);
  • Actual
    • S(F);XP(a)
    • Threat
      • QAB(C)+S(E)
    • Vars
      • R(f);CHECK,SBLOCK::QAB(C)+S(E)
      • R(f);CHECK,N_GUARD::B(D)+S(F)
      • R(f);CHECK,SBLOCK::B(D)+S(F)
      • K(g);S_FLIGHT::B(D)+S(F)
      • K(g);S_FLIGHT::QAB(C)+S(E),DCHECK
      • Q(h);SBLOCK::QAB(C)+S(E)
      • P(c);::QAB(C)+S(E),XP(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).