MESON Chess Problem Database

Problem Display
PID: 156066 (1KbR4/1p1r4/4p3/1QP1k2N/N5P1/5P2/Bp1q1P2/B2R4 w - - 0 1)

Bohm, Ferenc

Nederlandse Bond van Probleemvrienden, 1932

1KbR4/1p1r4/4p3/1QP1k2N/N5P1/5P2/Bp1q1P2/B2R4

#2

12 + 7

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bxb2#
    • 1...Qa5
      • 2.Qe2#
    • 1...Qe2
      • 2.Qxe2#
    • 1...Qd6+
      • 2.cxd6#
  • Tries
    • 1.Bxb2+?
      • 1...Qc3
        • 2.Qe2#
      • 1...Qd4
        • 2.Re1#
        • 2.Qe2#
      • 1...Rd4
        • 2.c6#
      • 1...Qxb2!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Bxb2#
        • 2.Rxd2#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qxe2!
  • Keys
    • 1.Sxb2!
      • threat
        • 2.Sd3#
      • 1...Qd6+
        • 2.cxd6#
      • 1...Kd4
        • 2.Sa4#
      • 1...Qxb2
        • 2.Qe2#
      • 1...Qc3
        • 2.Sc4#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Rd3
        • 2.Sxd3#
        • 2.Sc4#
      • 1...Rd4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(c);P_SPINQ(b),P_SPINR(f),S_FLIGHT::B(A),XP(a)
    • Q(b);N_GUARD::QAR(H)
    • Q(b);N_GUARD::QAR(H),XQ(b)
    • Q(b);CHECK,OGATE::QAR(H)+P(I),XQ(b)
  • Tries
    • Try
      • B(A);CHECK,XP(a)
      • Vars
        • Q(b);P_SPINQ(b)::QAR(H)
        • R(f);P_SPINR(f)::QAR(H)+P(I)
      • Refutation
        • Q(b);XB(A)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(H),XQ(b)
      • Refutation
        • Q(b);XQ(H)
  • Actual
    • S(F);XP(a)
    • Threat
      • B(A)+S(F),DCHECK
    • Vars
      • Q(b);CHECK,OGATE::QAR(H)+P(I),XQ(b)
      • K(c);P_SPINQ(b),P_SPINR(f),S_FLIGHT::B(A)+S(F)
      • Q(b);N_GUARD,P_SPINQ(b),XS(F)::QAR(H)
      • Q(b);::S(F)
      • Q(b);::B(A)+S(F),DCHECK,XQ(b)
      • R(f);::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).