MESON Chess Problem Database

Problem Display
PID: 60032 (B7/rqN5/Pb2P1Qp/1R3p2/RK2k1nr/1p2p1B1/1Pb1P3/1n6 w - - 0 1)

Koetsheid, Petrus Albertus

5th Highly Comm., Brisbane Courier, 1927

B7/rqN5/Pb2P1Qp/1R3p2/RK2k1nr/1p2p1B1/1Pb1P3/1n6

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxf5#
    • 1...Ba5+
      • 2.Kxa5#
    • 1...Bc5+
      • 2.Kxc5#
    • 1...Bxc7
      • 2.Kc5#
  • Tries
    • 1.Re5+?
      • 1...Kd4
        • 2.Kb5#
        • 2.Sb5#
      • 1...Sxe5!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Rd5#
      • 1...Bd4+
        • 2.Rb5#
      • 1...Ba5+
        • 2.Kxa5#
      • 1...Bc5+
        • 2.Kxc5#
      • 1...Bxc7+
        • 2.Kc5#
      • 1...Kd4
        • 2.Kb5#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Rh5
        • 2.Qxg4#
      • 1...Se5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(i);P_PINR(F),SBLOCK::QAB1(I),XP(h)
    • B(i);CHECK,P_PINR(F)::R(D)+K(E),XB(i)
    • B(i);P_PINR(F),XS(J)::R(D)+K(E)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • S(f);XR(F)
  • Actual
    • R(F);XP(h)
    • Threat
      • QAB(I)+R(F)
    • Vars
      • B(i);CHECK,SBLOCK::QAB(I)+R(F)
      • B(i);CHECK::R(D)+K(E),XB(i)
      • B(i);CHECK,XS(J)::R(D)+K(E)
      • K(e);N_SPINQ(l),P-FLIGHT::R(D)+K(E)
      • Q(l);::QAB(I)+R(F),XQ(l)
      • R(g);N_GUARD::QAR2(I),XS(f)
      • S(f);SBLOCK::QAB(I)+R(F),DCHECK
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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).