MESON Chess Problem Database

Problem Display
PID: 21437 (4qb2/1nBp1pp1/B5r1/6P1/RN2kP2/KNpR2pQ/7p/5n2 w - - 0 1)

Mansfield, Comins

2nd Prize, BCPS, 1919

4qb2/1nBp1pp1/B5r1/6P1/RN2kP2/KNpR2pQ/7p/5n2

#2

10 + 12

4797 A Genius of the Two-mover 1936
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sd5#
    • 1...Bxb4+
      • 2.Rxb4#
    • 1...g2
      • 2.Rd4#
    • 1...d6
      • 2.Sc6#
    • 1...f5
      • 2.Qg2#
  • Tries
    • 1.Bxb7+?
      • 1...d5
        • 2.Bxd5#
      • 1...Rc6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.f5#
      • 1...Bxb4+
        • 2.Rxb4#
      • 1...Rxg5
        • 2.fxg5#
      • 1...Qe5
        • 2.fxe5#
      • 1...Rd6
        • 2.Sd5#
      • 1...Bd6
        • 2.Bxb7#
      • 1...Se3
        • 2.Rd4#
      • 1...Sd6
        • 2.Sc5#
      • 1...d6
        • 2.Sc6#
      • 1...f5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(f);N_PINS(F)::R(E)+S(F)
    • B(l);CHECK,OGATE,P_SPINB(l),XS(F)::R(E),XB(l)
    • P(d);::R1(C)
    • P(h);N_PINS(F)::R(E)+S(F)
    • P(i);SBLOCK::QAB(D)
  • Tries
    • Try
      • B(I);CHECK,XS(g)
      • Vars
        • P(h);P_SPINP(h)::B(I),XP(h)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+P(G)
    • Vars
      • B(l);CHECK,OGATE,P_SPINB(l),XS(F)::R(E),XB(l)
      • R(f);OGATE,XP(H)::QAR(D)+P(G),XR(f)
      • Q(k);OGATE::QAR(D)+P(G),XQ(k)
      • R(f);N_PINS(F)::R(E)+S(F)
      • B(l);S_CUTP(h),S_CUTR(f)::B(I),XS(g)
      • S(a);SBLOCK::R1(C)
      • S(g);N_GUARD,N_PINS(F),S_CUTB(l)::S(B)
      • P(h);N_PINS(F)::R(E)+S(F)
      • P(i);SBLOCK::QAB1(D)
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).