MESON Chess Problem Database

Problem Display
PID: 22927 (4k2r/1R1p4/3K2p1/Q7/8/8/8/8 w k - 0 1)

Gruber, Hans

0-0, 1980

4k2r/1R1p4/3K2p1/Q7/8/8/8/8

#2

3 + 4

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Tries
    • 1.Rxd7?
      • threat
        • 2.Qd8#
        • 2.Qa8#
      • 1...Kf8
        • 2.Qd8#
        • 2.Qa8#
      • 1...0-0!
    • 1.Qa2?
      • threat
        • 2.Rb8#
      • 1...Kd8
        • 2.Rb8#
        • 2.Qa8#
      • 1...Kf8!
    • 1.Qd5?
      • threat
        • 2.Rb8#
      • 1...Kd8
        • 2.Rb8#
      • 1...Kf8!
    • 1.Qf5?
      • threat
        • 2.Rb8#
      • 1...Kd8
        • 2.Rb8#
        • 2.Qxd7#
      • 1...gxf5!
  • Keys
    • 1.Qd8+!
      • 1...Kf7
        • 2.Rxd7#
      • 1...Kxd8
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);XP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);0-0
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Vars
        • K(c);P-FLIGHT::R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::R(C),XP(b)
      • K(c);P-FLIGHT,XQ(A)::R(C)
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