MESON Chess Problem Database

Problem Display
PID: 149888 (6K1/p2B2Np/1n2R3/4n1p1/4Qrkr/1R1p4/q5PP/4B2N w - - 0 1)

Segers, Marcel

Union des Problemistes de France (UPF), 1935

6K1/p2B2Np/1n2R3/4n1p1/4Qrkr/1R1p4/q5PP/4B2N

#2

10 + 10

133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sf2#
    • 1...Qxb3
      • 2.Sf2#
    • 1...Qa1
      • 2.Sf2#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qxg2
      • 2.Qxg2#
    • 1...Qa3
      • 2.Sf2#
    • 1...Qa4
      • 2.Sf2#
    • 1...Qa5
      • 2.Sf2#
    • 1...Qa6
      • 2.Sf2#
    • 1...Sf3
      • 2.Rexb6#
    • 1...Sec4
      • 2.Rexb6#
    • 1...Sg6
      • 2.Rexb6#
    • 1...Sf7
      • 2.Rexb6#
    • 1...Sa4
      • 2.Rxe5#
    • 1...Sbc4
      • 2.Rxe5#
    • 1...Sd5
      • 2.Rxe5#
    • 1...Sa8
      • 2.Rxe5#
    • 1...Sc8
      • 2.Rxe5#
    • 1...d2
      • 2.Sf2#
      • 2.Rg3#
  • Tries
    • 1.Qxf4+?
      • 1...gxf4
        • 2.Rg6#
      • 1...Kxf4!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qf5#
      • 1...Qxe6+
        • 2.Bxe6#
      • 1...Qxg2
        • 2.Qxg2#
      • 1...Rxe4
        • 2.Rxe4#
      • 1...Qc4
        • 2.Sf2#
      • 1...Sec4
        • 2.Rexb6#
      • 1...Sbc4
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD,P_PINR(G),XR(E)::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
    • Q(a);OGATE,XP(C)::QAR2(F),XQ(a)
    • S(f);N_GUARD::B(H)+R(G),XS(h)
    • S(h);N_GUARD::B(H)+R(G),XS(f)
  • Tries
    • Try
      • Q(F);CHECK,XR(c)
      • Vars
        • P(g);SBLOCK,XQ(F)::B(H)+R(G),DCHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
  • Actual
    • R(E);P_SPINR(G)
    • Threat
      • QAB1(F)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XR(G)::B(H),XQ(a)
      • Q(a);N_PINR(G),OGATE,XP(C)::QAR2(F),XQ(a)
      • R(c);OGATE,XQ(F)::R(E),XR(c)
      • Q(a);N_GUARD::S(B)
      • S(f);N_PINR(G)::B(H)+R(G),XS(h)
      • S(h);N_PINR(G)::B(H)+R(G),XS(f)
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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).