MESON Chess Problem Database

Problem Display
PID: 179055 (7K/1B1N1p2/6b1/2Q1N3/2Rr1kPP/3q2n1/3PP3/6R1 w - - 0 1)

Rietveld, Johannes Jacob

Magasinet, 1937

7K/1B1N1p2/6b1/2Q1N3/2Rr1kPP/3q2n1/3PP3/6R1

#2

11 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.e3#
    • 1...Qc2
      • 2.e3#
    • 1...Qxc4
      • 2.e3#
    • 1...Qf5
      • 2.e3#
    • 1...Sf5
      • 2.Sxd3#
  • Tries
    • 1.Sxd3+?
      • 1...Bxd3
        • 2.Qg5#
      • 1...Kxg4!
    • 1.Rf1+?
      • 1...Qf3
        • 2.Rxf3#
        • 2.e3#
      • 1...Sxf1!
    • 1.Qxd4+?
      • 1...Qe4
        • 2.Qf2#
        • 2.Qe3#
        • 2.e3#
      • 1...Qxd4
        • 2.e3#
      • 1...Se4
        • 2.Sxd3#
      • 1...Be4!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qh6#
      • 1...Qf5
        • 2.e3#
      • 1...Se4
        • 2.Sxg6#
      • 1...Sf5
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::P(C)
    • Q(a);N_GUARD,N_SPINR(c),XR(D)::P(C)
    • S(b);S_CUTB(e)::S(H),XQ(a)
  • Tries
    • Try
      • S(H);CHECK,XQ(a)
      • Vars
        • B(e);XS(H)::QAB1(G)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b),XP(E)
    • Try
      • R(A);CHECK
      • Refutation
        • S(b);XR(A)
    • Try
      • Q(G);CHECK,XR(c)
      • Vars
        • Q(a);P_PINS(H),P_SPINQ(a),XQ(G)::P(C)
        • S(b);P_SPINS(b)::S(H),XQ(a)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • Q(G);P_PINP(f)
    • Threat
      • QAB(G)
    • Vars
      • Q(a);N_GUARD,N_SPINP(f)::P(C)
      • S(b);N_SPINR(c),S_CUTQ(a)::S(H),XB(e)
      • S(b);N_SPINP(f),S_CUTB(e)::S(H),XQ(a)
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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).