MESON Chess Problem Database

Problem Display
PID: 140213 (B4rb1/2Q1R3/4n3/3r4/4kpP1/2K1bnpN/6P1/N3R3 w - - 0 1)

de Haas, Bastian Evert

2nd HM., 04. Kwik-Toernooi, 1975

B4rb1/2Q1R3/4n3/3r4/4kpP1/2K1bnpN/6P1/N3R3

#2

9 + 9

102 Probleemblad 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa8
      • 2.Qxf4#
    • 1...Rb8
      • 2.Qxf4#
    • 1...Rd8
      • 2.Qxf4#
    • 1...Re8
      • 2.Qxf4#
    • 1...Bf7
      • 2.Qxf4#
    • 1...Sxe1
      • 2.Sg5#
    • 1...Sg1
      • 2.Sg5#
    • 1...Sd2
      • 2.Sg5#
    • 1...Sh2
      • 2.Sg5#
    • 1...Sd4
      • 2.Sg5#
    • 1...Sh4
      • 2.Sg5#
    • 1...Sg5
      • 2.Sxg5#
  • Tries
    • 1.Rxe6+?
      • 1...Se5
        • 2.Sg5#
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qc4#
      • 1...Bxe6!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Qxd5#
        • 2.Qxd4#
      • 1...Ke5!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sc5#
      • 1...Rxa8
        • 2.Qxf4#
      • 1...Sxe1
        • 2.Sg5#
      • 1...Se5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(h);N_GUARD,N_SPINR(f),XB(I)::QAR1(G),XP(e)
    • R(h);N_GUARD::QAR1(G),XP(e)
    • B(i);S_CUTR(h)::QAR1(G),XP(e)
    • S(b);N_GUARD,N_SPINB(a),XR(B)::S(E)
    • S(b);N_GUARD::S(E)
    • S(b);N_GUARD::S(E),XS(b)
  • Tries
    • Try
      • R(H);CHECK,XS(g)
      • Refutation
        • B(i);XR(H)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • R(h);N_GUARD,N_SPINR(f),XB(I)::QAR1(G),XP(e)
      • S(b);N_GUARD,N_SPINB(a),XR(B)::S(E)
      • S(b);N_GUARD,N_SPINS(g)::S(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).