MESON Chess Problem Database

Problem Display
PID: 57827 (b1NQ3B/2p5/4p3/1pr1n3/4kp2/1P1N1Rp1/2P3B1/K2R4 w - - 0 1)

Kupper, Josef

Comm., idee & form, 2002-2003

b1NQ3B/2p5/4p3/1pr1n3/4kp2/1P1N1Rp1/2P3B1/K2R4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3
      • 2.Qxd3#
  • Tries
    • 1.Sf2+?
      • 1...Kf5
        • 2.Qf6#
      • 1...gxf2!
    • 1.Sd6+?
      • 1...Kd4
        • 2.Sc1#
        • 2.Se1#
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sb4#
        • 2.Sxf4#
        • 2.Sxe5#
      • 1...Kd5
        • 2.Sb4#
        • 2.Sxe5#
      • 1...cxd6!
    • 1.Qd4+?
      • 1...Kxd4
        • 2.Sf2#
      • 1...Kf5!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Sxc5#
      • 1...Kd4
        • 2.Sf2#
      • 1...Kd5
        • 2.Rxf4#
      • 1...Rxc2
        • 2.Qxe5#
      • 1...Sxd3
        • 2.cxd3#
      • 1...Sxf3
        • 2.Re1#
      • 1...Rc3
        • 2.Qxe5#
      • 1...Rc4
        • 2.Qxe5#
      • 1...Rd5
        • 2.Qxf4#
      • 1...Rc6
        • 2.Qxe5#
      • 1...Sd7
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE,XS(F)::QAB1(I),XS(f)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(I)
      • Refutation
        • P(a);XS(F)
    • Try
      • S(H);CHECK
      • Refutation
        • P(h);XS(H)
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(f),XQ(I)::R(B)+S(F)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
  • Actual
    • Q(I);
    • Threat
      • S(F),XR(e)
    • Vars
      • K(b);P-FLIGHT,P_SPINS(f)::R(B)+S(F)
      • K(b);P_SPINS(f),S_FLIGHT::B(D)+R(G),XP(c)
      • R(e);N_GUARD,XP(C)::QAR1(I),XS(f)
      • S(f);OGATE,XS(F)::P(C),XS(f)
      • S(f);P_SPINS(f),XR(G)::R(B)
      • R(e);N_GUARD::QAR1(I),XS(f)
      • R(e);SBLOCK::QAR1(I),XP(c)
      • S(f);::R(B)
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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).