MESON Chess Problem Database

Problem Display
PID: 278011 (2n5/1Q4bp/2r5/3P3R/4kNp1/3Rp1K1/2r1N3/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

To Mat, 1956

2n5/1Q4bp/2r5/3P3R/4kNp1/3Rp1K1/2r1N3/8

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Rd4#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Bf6
      • 2.Qxh7#
    • 1...Bh6
      • 2.Rd4#
    • 1...Bf8
      • 2.Rd4#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qh1#
      • 1...Rc1
        • 2.Rd4#
      • 1...Rxe2!
  • Keys
    • 1.Qxg7!
      • threat
        • 2.Rd4#
        • 2.Re5#
        • 2.Qd4#
        • 2.Qe5#
      • 1...Rd2
        • 2.Re5#
        • 2.Qd4#
        • 2.Qe5#
      • 1...R2c4
        • 2.Re5#
        • 2.Qe5#
      • 1...R6c4
        • 2.Re5#
        • 2.Qe5#
        • 2.Qxh7#
      • 1...Re6
        • 2.Rd4#
        • 2.Qd4#
      • 1...Rf6
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(e);S_CUTB(f)::R1(B)
    • B(f);N_GUARD::R1(B),XB(f)
    • B(f);OGATE::QAB(G),XP(g)
    • B(f);N_GUARD::R1(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • R(a);::QAB(G)+R(B),DCHECK
      • Refutation
        • R(a);XS(A)
  • Actual
    • Q(G);XB(f)
    • Threat
      • DUALS(4)
    • Vars
      • R(e);::R1(B)
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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).