MESON Chess Problem Database

Problem Display
PID: 277101 (b7/bR3r2/2p5/r7/2P3R1/p4N1k/7N/7K w - - 0 1)

Paslack, Rainer

The Problemist Supplement, 2023

b7/bR3r2/2p5/r7/2P3R1/p4N1k/7N/7K

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sg5#
    • 1...Rc5
      • 2.Sg1#
    • 1...Rg5
      • 2.Sxg5#
    • 1...Ra6
      • 2.Sg5#
    • 1...Bg1
      • 2.Sxg1#
    • 1...Bc5
      • 2.Sg5#
    • 1...Bb8
      • 2.Sg1#
    • 1...c5
      • 2.Sg1#
      • 2.Sg5#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Sg1#
        • 2.Sg5#
      • 1...Rxf3
        • 2.Rxf3#
      • 1...Rg5
        • 2.Sg1#
        • 2.Sxg5#
      • 1...Bg1
        • 2.Sxg1#
        • 2.Sg5#
      • 1...Be3
        • 2.Sg1#
      • 1...c5!
  • Keys
    • 1.c5!
      • threat
        • 2.Sg1#
        • 2.Sg5#
      • 1...Rxc5
        • 2.Sg1#
      • 1...Rxf3
        • 2.Rh7#
      • 1...Bxc5
        • 2.Sg5#
      • 1...Rf5
        • 2.Sg1#
      • 1...Rg7
        • 2.Sg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,SBLOCK::S(C)
    • R(c);S_CUTB(e)::S(C)
    • R(c);N_GUARD::S(C),XR(c)
    • R(c);N_GUARD::S(C)
    • B(e);N_GUARD::S(C),XB(e)
    • B(e);S_CUTR(c)::S(C)
    • B(e);N_GUARD::S(C)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);OGATE,P_SPINR(f),XS(C)::R(F),XR(f)
        • B(e);::S(C)
      • Refutation
        • P(d);P_PINS(C)
  • Actual
    • P(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XP(D)::S(C)
      • R(f);OGATE,XS(C)::R(F)
      • B(e);XP(D)::S(C)
      • R(f);::S(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).