MESON Chess Problem Database

Problem Display
PID: 15336 (r3k3/7R/8/8/2p1K3/8/8/4Q3 w q - 0 1)

Auhagen, Ulrich Otto Ferdinand

Schach aktuell, 1982

r3k3/7R/8/8/2p1K3/8/8/4Q3

#2

3 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0!
    • 1.Qg3?
      • threat
        • 2.Qg8#
      • 1...Kd8
        • 2.Qg8#
      • 1...0-0-0
        • 2.Qc7#
      • 1...Kf8!
    • 1.Qa1?
      • threat
        • 2.Qh8#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qh8#
        • 2.Qxa8#
      • 1...Kf8
        • 2.Qh8#
        • 2.Qxa8#
      • 1...0-0-0
        • 2.Qa8#
      • 1...Ra2
        • 2.Qh8#
      • 1...Ra3
        • 2.Qh8#
      • 1...Ra4
        • 2.Qh8#
      • 1...Ra5
        • 2.Qh8#
      • 1...Ra6
        • 2.Qh8#
      • 1...Ra7
        • 2.Qh8#
      • 1...Rb8
        • 2.Qh8#
      • 1...Rc8
        • 2.Qh8#
      • 1...Rd8
        • 2.Qh8#
      • 1...c3
        • 2.Qxa8#
      • 1...Rxa1!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Ra7
        • 2.Qb8#

This anticipates 76201(2006)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);0-0-0,P_SPINP(a)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);0-0-0,OGATEB::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);0-0-0::QAR2(A)
        • R(b);::QAR(A)
        • R(b);SBLOCK::QAR(A)
        • P(a);::QAR(A),XR(b)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);0-0-0,OGATEB::QAB1(A)
      • R(b);N_GUARD::QAR(A)
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