MESON Chess Problem Database

Problem Display
PID: 140022 (1q4b1/6r1/BQ6/1PRp3r/K2pN1R1/b2k4/1P1NpP2/2B5 w - - 0 1)

Haring, Jacobus

Die Schwalbe, 1966

1q4b1/6r1/BQ6/1PRp3r/K2pN1R1/b2k4/1P1NpP2/2B5

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Rg3#
  • Tries
    • 1.Qd6?
      • threat
        • 2.b6#
      • 1...Qxb5+
        • 2.Bxb5#
      • 1...dxe4
        • 2.Rc3#
      • 1...Qa7
        • 2.Qg3#
      • 1...Qb6
        • 2.Qg3#
      • 1...Qb7
        • 2.Qg3#
      • 1...Qa8
        • 2.Qg3#
      • 1...Qc8
        • 2.Qg3#
      • 1...Qe8
        • 2.Qg3#
      • 1...Ra7
        • 2.Rg3#
      • 1...Bxc5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.b6#
      • 1...Qxb5+
        • 2.Bxb5#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Qa7
        • 2.Rg3#
      • 1...Qb6
        • 2.Rg3#
      • 1...Qb7
        • 2.Rg3#
      • 1...Qa8
        • 2.Rg3#
      • 1...Qc8
        • 2.Rg3#
      • 1...Qe8
        • 2.Rg3#
      • 1...Ra7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD,S_CUTQ(h)::R(G)
  • Tries
    • Try
      • Q(K);
      • Threat
        • B(J)+P(H)
      • Vars
        • Q(h);CHECK,OGATE,P_SPINQ(h),XP(H)::B(J),XQ(h)
        • P(e);P_SPINP(d),XS(F)::R1(I)
        • Q(h);N_GUARD,P_PINB(J)::QAR(K)
        • Q(h);N_GUARD::QAR(K)
        • Q(h);N_GUARD,P_PINP(H)::QAR(K)
        • R(g);N_GUARD,P_PINB(J)::R(G)
      • Refutation
        • B(b);XR(I)
  • Actual
    • Q(K);
    • Threat
      • B(J)+P(H)
    • Vars
      • Q(h);CHECK,OGATE,P_SPINQ(h),XP(H)::B(J),XQ(h)
      • B(b);XR(I)::QAB(K)+S(F),DCHECK,XB(b)
      • P(e);OGATE,P_SPINP(e),XS(F)::QAB1(K),XP(e)
      • Q(h);N_GUARD,P_PINB(J)::R(G)
      • Q(h);N_GUARD::R(G)
      • Q(h);N_GUARD,P_PINP(H)::R(G)
      • R(g);N_GUARD,P_PINB(J)::QAB(K)+S(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).