MESON Chess Problem Database

Problem Display
PID: 44201 (2bN4/qpP1pp2/Rb2nkpP/8/3N4/2B3Q1/R7/1B4K1 w - - 0 1)

Bohn, F

Het Schaakleven, 1931

2bN4/qpP1pp2/Rb2nkpP/8/3N4/2B3Q1/R7/1B4K1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4+
      • 2.Rf2#
    • 1...Ba5
      • 2.Rf2#
      • 2.Qf4#
    • 1...Bc5
      • 2.Rf2#
      • 2.Qf4#
    • 1...Sc5
      • 2.S4e6#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Rf2#
        • 2.Qf4#
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Rf2#
      • 1...Bxc7
        • 2.Qg5#
      • 1...fxe6
        • 2.Rf2#
        • 2.Qf4#
      • 1...g5
        • 2.Rf2#
        • 2.Qxg5#
      • 1...Bxe6!
  • Keys
    • 1.R2a5!
      • threat
        • 2.Qe5#
      • 1...Bxd4+
        • 2.Qf2#
      • 1...Bxa5
        • 2.Qf4#
      • 1...Bxc7
        • 2.Qg5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Bc5
        • 2.Qf4#
      • 1...Sc5
        • 2.S4e6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,P_SPINB(a),P_SPINS(b),XS(F)::R(C)
    • S(b);N_PINS(F),P_SPINB(a)::B(D)+S(F)
  • Tries
    • Try
      • S(J);XS(b)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);CHECK,P_SPINB(a),XS(F)::R(C)
        • B(a);XP(I)::QAB1(E)
      • Refutation
        • B(i);XS(J)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • B(a);CHECK,P_SPINB(a),P_SPINS(b),XS(F)::QAR(E)
      • B(a);P_SPINS(b),XR(C)::QAR2(E)
      • B(a);P_SPINS(b),XP(I)::QAB1(E)
      • S(b);N_GUARD,P_SPINB(a)::QAB1(E)
      • B(a);P_SPINS(b)::QAR2(E)
      • S(b);N_PINS(F),P_SPINB(a)::B(D)+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).