MESON Chess Problem Database

Problem Display
PID: 75928 (1R5K/2N5/NPk1P3/4Q2p/1p5r/1br2p1B/1qR5/8 w - - 0 1)

Joffart, Daniel

La Cle, 1971

1R5K/2N5/NPk1P3/4Q2p/1p5r/1br2p1B/1qR5/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rcc4
      • 2.Sxb4#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Rxh3
      • 2.Sxb4#
    • 1...Rhc4
      • 2.Qd5#
    • 1...Bxc2
      • 2.Qd5#
    • 1...Ba4
      • 2.Qd5#
    • 1...Bc4
      • 2.Qc5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bxe6
      • 2.Qxe6#
  • Tries
    • 1.Rxc3+?
      • 1...Rc4
        • 2.Sxb4#
        • 2.Qd5#
      • 1...Bc4
        • 2.Qc5#
        • 2.Qd5#
      • 1...bxc3
        • 2.Qc5#
      • 1...Qxc3!
  • Keys
    • 1.Bf1!
      • threat
        • 2.Bb5#
      • 1...Rcc4
        • 2.Sxb4#
      • 1...Rhc4
        • 2.Qd5#
      • 1...Ba4
        • 2.Qd5#
      • 1...Bc4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(c);P_PINQ(C),S_CUTR(f)::S(D),XP(e)
    • R(c);OGATE,P_PINQ(C)::R1(A),XR(c)
    • R(f);N_GUARD,XB(B)::S(D),XP(e)
    • R(f);N_SPINR(c),S_CUTB(b)::QAB1(C)
    • B(b);N_GUARD,N_SPINR(c),XR(A)::QAB1(C)
    • B(b);N_GUARD::QAB1(C)
    • B(b);N_SPINR(c),S_CUTR(c)::QAR1(C)
    • B(b);N_GUARD::QAB1(C),XB(b)
    • B(b);OGATE,XP(F)::QAR2(C),XB(b)
  • Tries
    • Try
      • R(A);CHECK,XR(c)
      • Vars
        • P(e);XR(A)::QAR1(C)
      • Refutation
        • Q(a);P_PINQ(C),XR(A)
  • Actual
    • B(B);
    • Threat
      • B(B)
    • Vars
      • R(c);P_PINQ(C),S_CUTR(f)::S(D),XP(e)
      • R(f);N_SPINR(c),S_CUTB(b)::QAB1(C)
      • B(b);N_GUARD::QAB1(C)
      • B(b);N_SPINR(c),S_CUTR(c)::QAR1(C)
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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).