MESON Chess Problem Database

Problem Display
PID: 129823 (r3k3/p7/4K3/8/1p6/8/Q6B/8 w q - 0 1)

Reinhard, G

Tidskrift for Schack, 1959

r3k3/p7/4K3/8/1p6/8/Q6B/8

#2

3 + 4

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...0-0-0
      • 2.Qa6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0!
    • 1.Qg2?
      • threat
        • 2.Qxa8#
        • 2.Qg8#
      • 1...Kd8
        • 2.Qxa8#
        • 2.Qg8#
      • 1...0-0-0
        • 2.Qc6#
        • 2.Qa8#
      • 1...Rb8
        • 2.Qg8#
      • 1...Rc8
        • 2.Qg8#
      • 1...Rd8
        • 2.Qg8#
      • 1...Kf8!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qxa7?
      • threat
        • 2.Qe7#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qd7#
        • 2.Qxa8#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0-0
        • 2.Qb8#
        • 2.Qa6#
        • 2.Qc7#
        • 2.Qa8#
      • 1...Rb8
        • 2.Qxb8#
        • 2.Qe7#
      • 1...Rc8
        • 2.Qe7#
      • 1...Rd8
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rxa7!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0
        • 2.Qa6#

This anticipates 120241(1969), 205838(1977), 249875(1977)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);0-0-0,OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR(A)
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • K(d);0-0-0
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR2(A)
        • R(c);SBLOCK::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • R(c);::QAR1(A)
      • Refutation
        • R(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(d);P-FLIGHT::QAR(A)
      • K(d);P-FLIGHT::QAR2(A)
      • K(d);0-0-0,OGATEB::QAB(A)
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