MESON Chess Problem Database

Problem Display
PID: 6389 (3b2K1/R2PkNP1/1p1p3p/1q1P4/5R2/1p2N2b/8/6Q1 w - - 0 1)

Mansfield, Comins

3rd Prize, De Problemist, 1929

3b2K1/R2PkNP1/1p1p3p/1q1P4/5R2/1p2N2b/8/6Q1

#2

9 + 8

20 De Problemist 1930
35 L'Italia Scacchistica 1930
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.d8Q#
    • 1...h5
      • 2.Qg5#
  • Tries
    • 1.Re4+?
      • 1...Be6
        • 2.Rxe6#
      • 1...Kf6!
    • 1.Qg6?
      • threat
        • 2.Qxd6#
        • 2.Qf6#
      • 1...Qxd5
        • 2.Sxd5#
        • 2.Qf6#
      • 1...Bxd7
        • 2.Re4#
        • 2.Qe4#
        • 2.Qe6#
      • 1...Bc7
        • 2.d8Q#
      • 1...Qc6
        • 2.Qf6#
      • 1...Qb4
        • 2.Qf6#
      • 1...Qc5
        • 2.Qf6#
      • 1...Bf5
        • 2.Sxf5#
        • 2.Qxd6#
      • 1...Be6
        • 2.Qxe6#
        • 2.Qf6#
      • 1...Qxd7!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qh4#
      • 1...Qxd7
        • 2.Sg4#
      • 1...Qxd5
        • 2.Sxd5#
      • 1...Bxd7
        • 2.Sc4#
      • 1...Bc7
        • 2.d8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(h);OGATE::P=Q
    • P(f);N_GUARD::QAB(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(b);N_GUARD,P_PINS(G),P_SPINB(b)::R1(C),XB(b)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);OGATE::P=Q
        • Q(c);::QAB1(A)
      • Refutation
        • Q(c);P_SPINQ(c),XP(F)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XP(F)::QAR(A)+S(B)
      • Q(c);P_PINS(G),XP(D)::QAR(A)+S(B),DCHECK,XQ(c)
      • B(b);N_GUARD,P_SPINB(b),XP(F)::QAR(A)+S(B)
      • B(h);OGATE::P=Q
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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).