MESON Chess Problem Database

Problem Display
PID: 254636 (2r1knnR/1N1p2br/2PB1pPp/3NqB2/b3R3/Q6K/8/8 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Probleemblad, 1946

2r1knnR/1N1p2br/2PB1pPp/3NqB2/b3R3/Q6K/8/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sxc7#
    • 1...Ra8
      • 2.Sc7#
    • 1...Rb8
      • 2.Sc7#
    • 1...Rd8
      • 2.Sc7#
    • 1...Sxg6
      • 2.Bxg6#
    • 1...Se7
      • 2.Bxd7#
  • Tries
    • 1.Sxf6+?
      • 1...Sxf6
        • 2.Rxe5#
      • 1...Bxf6!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Sd6#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Sxg6
        • 2.Bxg6#
      • 1...Se6
        • 2.Qe7#
      • 1...Se7
        • 2.Bxd7#
      • 1...d6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(h);N_GUARD::S(D),XR(h)
    • R(h);N_GUARD::S(D)
    • S(j);OGATE,P_SPINS(k),XP(H)::B(E),XS(j)
    • S(k);N_SPINQ(b),P_SPINS(j)::B(E),XP(e)
  • Tries
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • S(k);P_SPINS(j),XS(D)::R(C),XQ(b)
      • Refutation
        • B(f);XS(D)
  • Actual
    • B(G);
    • Threat
      • S(I)
    • Vars
      • R(h);XB(G)::S(D),XR(h)
      • S(j);OGATE,P_SPINS(k),XP(H)::B(E),XS(j)
      • S(j);N_SPINQ(b),P_SPINS(k),S_CUTQ(b)::QAR1(A)
      • S(k);N_SPINQ(b),P_SPINS(j)::B(E),XP(e)
      • P(e);::S(I),XP(e)
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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).