MESON Chess Problem Database

Problem Display
PID: 257219 (4R2b/1pPPqN2/1B4B1/KN3r2/Rp2kpn1/1P1n3r/3QP3/8 w - - 0 1)

Brummelman, Derk Hendrikus (AKA Bruma, DH)

Probleemblad, 1947

4R2b/1pPPqN2/1B4B1/KN3r2/Rp2kpn1/1P1n3r/3QP3/8

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxd3#
    • 1...Rh2
      • 2.Qxd3#
    • 1...Rh4
      • 2.Qxd3#
    • 1...Rh5
      • 2.Qxd3#
    • 1...Rh6
      • 2.Qxd3#
    • 1...Rh7
      • 2.Qxd3#
    • 1...Sc5
      • 2.Sbd6#
    • 1...Sde5
      • 2.Qd4#
    • 1...Se3
      • 2.Qxd3#
    • 1...Sge5
      • 2.Sc3#
  • Tries
    • 1.Rxe7+?
      • 1...Be5
        • 2.Sc3#
      • 1...Sde5
        • 2.Sbd6#
        • 2.Sg5#
        • 2.Sfd6#
        • 2.Rxb4#
        • 2.Qd4#
      • 1...Sge5
        • 2.Sc3#
      • 1...Kd5!
    • 1.Qxb4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sxb4!
  • Keys
    • 1.c8Q!
      • threat
        • 2.Qxb7#
      • 1...Kd5
        • 2.Qc4#
      • 1...Sc5
        • 2.Sbd6#
      • 1...Sde5
        • 2.Qd4#
      • 1...Se3
        • 2.Qxd3#
      • 1...Sge5
        • 2.Sc3#
      • 1...Sf6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAB1(A),XS(a)
    • S(a);N_PINS(F)::S(F)
    • S(a);N_PINS(F),N_SPINQ(i),OGATE::QAR1(A)
    • S(f);S_CUTR(b)::QAB1(A),XS(a)
    • S(f);N_PINS(F),N_SPINQ(i)::S(F)
  • Tries
    • Try
      • R(L);CHECK,XQ(i)
      • Vars
        • B(j);N_PINS(F),P_SPINB(j)::S(F)
        • S(f);N_PINS(F),P_SPINS(f)::S(F)
      • Refutation
        • K(d);N_PINS(F),N_SPINP(c),N_SPINR(g),P_SPINS(a),S_FLIGHT
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • K(d);N_PINS(F),N_SPINQ(i),N_SPINR(g),S_CUTB(j),S_FLIGHT::QAB1(A)
        • B(j);N_GUARD,P_SPINB(j)::QAR1(A),XB(j)
      • Refutation
        • S(a);P_SPINS(a),XQ(A)
  • Actual
    • P(I);
    • Threat
      • QAB(I),XP(h)
    • Vars
      • K(d);N_PINS(F),N_SPINP(c),N_SPINQ(i),N_SPINR(g),P_SPINS(a),S_CUTB(j),S_FLIGHT::QAB1(I)
      • S(a);N_PINS(F)::S(F)
      • S(a);N_PINS(F),N_SPINQ(i),OGATE::QAR1(A)
      • S(f);S_CUTR(b)::QAB1(A),XS(a)
      • S(f);N_PINS(F),N_SPINQ(i)::S(F)
      • S(f);S_CUTB(j)::QAR2(I)
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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).