MESON Chess Problem Database

Problem Display
PID: 21065 (B5b1/BR6/2N5/4p1K1/1NRpkp2/r3np2/3PnPP1/2rqQ3 w - - 0 1)

Mansfield, Comins

Good Companions (February), 1916

B5b1/BR6/2N5/4p1K1/1NRpkp2/r3np2/3PnPP1/2rqQ3

#2

11 + 11

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1947
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Tries
    • 1.Qxe2?
      • threat
        • 2.gxf3#
      • 1...fxe2
        • 2.f3#
      • 1...fxg2
        • 2.f3#
      • 1...Qg1
        • 2.Qxf3#
      • 1...Qh1
        • 2.Qxf3#
      • 1...Qxe2!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.gxf3#
      • 1...Sxd4
        • 2.Rf7#
      • 1...Sxg2
        • 2.Rf7#
      • 1...Sxc4
        • 2.Rf7#
      • 1...fxg2
        • 2.f3#
      • 1...exd4
        • 2.Re7#
      • 1...Sg1
        • 2.Rf7#
      • 1...Sc3
        • 2.Se6#
      • 1...Sg3
        • 2.Rf7#
      • 1...Sf1
        • 2.Rf7#
      • 1...Sc2
        • 2.Rf7#
      • 1...Sg4
        • 2.Rf7#
      • 1...Sd5
        • 2.Sdc2#
      • 1...Sf5
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);P_PINS(e),XS(c)
      • Threat
        • P(D),XP(f)
      • Vars
        • P(f);N_SPINS(e),OGATE,XQ(A)::P(C)
        • P(f);OGATE,XP(D)::P(C)
        • Q(b);N_GUARD,P_PINP(D)::QAB1(A),XP(f)
        • Q(b);N_GUARD::QAB1(A),XP(f)
      • Refutation
        • Q(b);N_SPINS(e),XQ(A)
  • Actual
    • S(H);XP(g)
    • Threat
      • P(D),XP(f)
    • Vars
      • S(c);P_SPINS(e),XS(H)::B(K)+R(J)
      • S(e);N_GUARD,P_SPINS(c),XP(D)::B(K)+R(J)
      • S(e);N_GUARD,P_SPINS(c),XR(F)::B(K)+R(J)
      • P(f);OGATE,XP(D)::P(C)
      • P(j);P_SPINP(j),XS(H)::B(K)+R(J),DCHECK
      • S(c);P_SPINS(e)::B(K)+R(J)
      • S(c);N_GUARD,P_SPINS(e),S_CUTR(a)::R(F)+S(H)
      • S(e);N_GUARD,P_SPINS(c)::B(K)+R(J)
      • S(e);N_GUARD,P_SPINS(c),S_CUTB(k)::R(F)+S(H)
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).