MESON Chess Problem Database

Problem Display
PID: 225705 (2bR1b2/8/N2n4/1PR1n2r/1p1k1B2/2pP1P2/2p5/K1N5 w - - 0 1)

Polacek, Ladislav

Praca, 1953

2bR1b2/8/N2n4/1PR1n2r/1p1k1B2/2pP1P2/2p5/K1N5

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Rxd6#
    • 1...Bg7
      • 2.Rxd6#
    • 1...Sxd3
      • 2.Se2#
      • 2.Sb3#
  • Tries
    • 1.Rc4+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Sxc4!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Rd5#
      • 1...Kxc5
        • 2.Be3#
      • 1...Sxd3
        • 2.Sb3#
      • 1...Sxf3
        • 2.Rc4#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bb7
        • 2.Se6#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sg4
        • 2.Rc4#
      • 1...Sc6
        • 2.Rc4#
      • 1...Sg6
        • 2.Rc4#
      • 1...Sd7
        • 2.Se6#
      • 1...Sf7
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • B(i);N_GUARD::R(I),XS(g)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(d);P-FLIGHT::S(H)
      • Refutation
        • S(e);XR(G)
  • Actual
    • S(H);
    • Threat
      • R1(G)
    • Vars
      • K(d);N_SPINS(g),S_FLIGHT,XR(G)::B(E)
      • S(e);SBLOCK,XP(C)::S(B)
      • S(e);N_GUARD,XP(D)::R1(G)
      • B(h);N_GUARD::S(H),XB(h)
      • B(h);N_GUARD::S(H)
      • S(e);N_GUARD::R1(G),XS(e)
      • S(e);N_GUARD::R1(G)
      • S(e);N_SPINS(g),S_CUTB(h)::S(H)
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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).