MESON Chess Problem Database

Problem Display
PID: 278313 (b6r/8/4kP2/2PRN1P1/2P1P1R1/r6B/2NP2p1/b5K1 w - - 0 1)

Riczu, Lajos

Stella Polaris, 1972

b6r/8/4kP2/2PRN1P1/2P1P1R1/r6B/2NP2p1/b5K1

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rh4#
    • 1...Rc3
      • 2.Sd4#
    • 1...Ra4
      • 2.Rh4#
    • 1...Ra5
      • 2.Rh4#
    • 1...Ra6
      • 2.Rh4#
    • 1...Ra7
      • 2.Rh4#
    • 1...Rb8
      • 2.Rg3#
    • 1...Rc8
      • 2.Rg3#
    • 1...Rd8
      • 2.Rg3#
    • 1...Re8
      • 2.Rg3#
    • 1...Rf8
      • 2.Rg3#
    • 1...Rg8
      • 2.Rg3#
    • 1...Bc3
      • 2.Rh4#
    • 1...Bd4+
      • 2.Sxd4#
  • Keys
    • 1.d4!
      • threat
        • 2.Rd6#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Bxd5
        • 2.cxd5#
      • 1...Ra6
        • 2.Rh4#
      • 1...Rd8
        • 2.Rg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(c);N_GUARD::B(D)+R(G)
    • R(c);S_CUTB(a)::S(B)
    • R(f);N_GUARD::B(D)+R(G)
    • B(a);S_CUTR(c)::B(D)+R(G)
    • B(a);CHECK,N_GUARD::S(B),XB(a)
  • Actual
    • P(C);
    • Threat
      • R1(I)
    • Vars
      • B(a);CHECK,XP(C)::S(B),XB(a)
      • B(e);OGATE,XR(I)::P(E),XB(e)
      • R(c);N_GUARD::B(D)+R(G)
      • R(f);N_GUARD::B(D)+R(G)
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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).