MESON Chess Problem Database

Problem Display
PID: 108246 (3N2r1/b5p1/4p3/P1k3K1/6RQ/1pp1N3/1p5B/3n1B2 w - - 0 1)

Degener, Udo

Linss, Torsten

3rd HM., Vecherni Kharkov, 1990

(First published on Sat Feb 10 1990)

3N2r1/b5p1/4p3/P1k3K1/6RQ/1pp1N3/1p5B/3n1B2

#2

8 + 9

6490 yacpdb 2009
3713 Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4?
      • threat
        • 2.Rb5#
        • 2.Qc4#
        • 2.Qd4#
      • 1...Rxd8
        • 2.Qc4#
      • 1...Sxe3
        • 2.Rb5#
        • 2.Qd4#
      • 1...e5!
    • 1.Qg3?
      • threat
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...Rxd8
        • 2.Qc7#
      • 1...Sxe3
        • 2.Qd6#
      • 1...e5
        • 2.Qxe5#
      • 1...Bb6
        • 2.Qe5#
        • 2.Qd6#
      • 1...Bb8!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qb4#
        • 2.Qc4#
        • 2.Qd4#
      • 1...Rxd8
        • 2.Qc4#
      • 1...Sxe3
        • 2.Qd4#
      • 1...e5
        • 2.Qb4#

This anticipates 273277(1990)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Vars
        • R(i);XS(H)::QAR1(E)
      • Refutation
        • P(f);
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • R(i);XS(H)::QAR2(E)
        • S(a);XS(C)::QAB1(E)
        • P(f);::QAR2(E),XP(f)
      • Refutation
        • B(g);
  • Actual
    • R(D);
    • Threat
      • DUALS(3)
    • Vars
      • R(i);XS(H)::QAR1(E)
      • S(a);XS(C)::QAB1(E)
      • P(f);::QAB1(E)
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