MESON Chess Problem Database

Problem Display
PID: 99299 (Q3N3/brP2p2/k3nR2/pr1N1p2/R1B2P2/P1PKp3/2P1P3/8 w - - 0 1)

Molnar, Arpad

Magyar Sakkelet, 1958

Q3N3/brP2p2/k3nR2/pr1N1p2/R1B2P2/P1PKp3/2P1P3/8

#2

13 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Sb4#
    • 1...Rxc7
      • 2.Sexc7#
    • 1...Rb8
      • 2.cxb8S#
  • Tries
    • 1.Sg7?
      • 1...Rb6
        • 2.Sb4#
      • 1...Rb8
        • 2.cxb8S#
      • 1...Rxc7!
    • 1.Rxe6+?
      • 1...Rb6
        • 2.Sb4#
        • 2.Rxb6#
        • 2.Qc8#
        • 2.c8Q#
        • 2.c8B#
      • 1...fxe6!
    • 1.Rh6?
      • 1...Rxc7
        • 2.Sexc7#
      • 1...Rb6
        • 2.Sb4#
      • 1...Rb8
        • 2.cxb8S#
      • 1...f6!
  • Keys
    • 1.c8R!
      • 1...Rb6
        • 2.Sb4#
      • 1...Rc7
        • 2.Sexc7#
      • 1...Rd7
        • 2.Rc6#
      • 1...Re7
        • 2.Rc6#
      • 1...Rb8
        • 2.Sec7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(h);N_SPINS(f),SBLOCK::S(I)
    • R(h);XP(K)::S(M),XR(h)
    • R(h);OGATE::PXR(h)=S
  • Tries
    • Try
      • S(M);
      • Vars
        • R(h);N_SPINS(f),SBLOCK::S(I)
        • R(h);OGATE::PXR(h)=S
      • Refutation
        • R(h);XP(K)
    • Try
      • R(J);CHECK,XS(f)
      • Refutation
        • P(i);XR(J)
    • Try
      • R(J);
      • Vars
        • R(h);XP(K)::S(M),XR(h)
        • R(h);N_SPINS(f),SBLOCK::S(I)
        • R(h);OGATE::PXR(h)=S
      • Refutation
        • P(i);N_SPINS(f)
  • Actual
    • P(K);
    • Vars
      • R(h);N_SPINS(f),SBLOCK::S(I)
      • R(h);N_GUARD::S(M),XR(h)
      • R(h);N_GUARD,P_PINS(I)::R(K)
      • R(h);N_GUARD::R(K)
      • R(h);N_GUARD::S(M)
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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).