MESON Chess Problem Database

Problem Display
PID: 245110 (8/5p1r/4kN2/2B3RN/r3Pb2/1p2R1p1/6bp/1B2KQ2 w - - 0 1)

Haring, Jacobus

De Maasbode, 1956

8/5p1r/4kN2/2B3RN/r3Pb2/1p2R1p1/6bp/1B2KQ2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc4#
    • 1...Ra2
      • 2.Qc4#
    • 1...Ra3
      • 2.Qc4#
    • 1...Rc4
      • 2.Qxc4#
    • 1...Rxe4
      • 2.Qc4#
    • 1...Ra5
      • 2.Qc4#
    • 1...Ra6
      • 2.Qc4#
    • 1...Ra7
      • 2.Qc4#
    • 1...Ra8
      • 2.Qc4#
    • 1...Bh1
      • 2.Qh3#
    • 1...Bh3
      • 2.Qxh3#
    • 1...Bxe4
      • 2.Qh3#
    • 1...Bxe3
      • 2.Qf5#
    • 1...Be5
      • 2.Qf5#
    • 1...Bxg5
      • 2.Qf5#
    • 1...Bc7
      • 2.Qf5#
    • 1...Bb8
      • 2.Qf5#
  • Tries
    • 1.Sg7+?
      • 1...Kxf6
        • 2.Qxf4#
      • 1...Rxg7!
    • 1.Re5+?
      • 1...Bxe5
        • 2.Qf5#
      • 1...Kxe5!
    • 1.Qa6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Rxa6!
  • Keys
    • 1.e5!
      • threat
        • 2.Bf5#
      • 1...Bxe3
        • 2.Qf5#
      • 1...Ra1
        • 2.Sxf4#
      • 1...Re4
        • 2.Qa6#
      • 1...Bh3
        • 2.Qxh3#
      • 1...Be4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • R(e);N_GUARD,P_PINB(A)::QAB(C)
    • R(e);N_GUARD::QAB(C)
    • R(e);N_GUARD::QAB(C),XR(e)
    • R(e);N_GUARD,P_PINR(D),P_SPINR(e),XP(E)::QAB(C)
    • B(a);OGATE::QAB(C)
    • B(a);OGATE::QAB(C),XB(a)
    • B(a);OGATE,P_SPINB(a),XP(E)::QAB(C)
    • B(f);OGATE,XR(D)::QAB1(C)
    • B(f);OGATE::QAB1(C)
    • B(f);OGATE,XR(G)::QAB1(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINB(f),XS(I)::QAR2(C),XB(f)
      • Refutation
        • R(i);XS(H)
    • Try
      • R(G);CHECK
      • Vars
        • B(f);OGATE,XR(G)::QAB1(C)
      • Refutation
        • K(g);P-FLIGHT,XR(G)
    • Try
      • Q(C);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(C),XB(f)
      • Refutation
        • R(e);XQ(C)
  • Actual
    • P(E);
    • Threat
      • B(A)
    • Vars
      • B(f);OGATE,XR(D)::QAB1(C)
      • R(e);N_GUARD,P_PINB(A)::S(H),XB(f)
      • R(e);N_GUARD,P_PINR(D),S_CUTB(a)::QAR(C)
      • B(a);OGATE::QAB(C),XB(a)
      • B(a);S_CUTR(e)::S(H),XB(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).