MESON Chess Problem Database

Problem Display
PID: 91890 (3k4/P7/2P1RR2/8/8/8/5K1p/8 w - - 0 1)

Gruber, Hans

Jugend Schach, 1981

3k4/P7/2P1RR2/8/8/8/5K1p/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Re8+?
      • 1...Kc7
        • 2.a8S#
      • 1...Kxe8!
    • 1.Rf7?
      • threat
        • 2.a8Q#
        • 2.a8R#
      • 1...Kc8
        • 2.Re8#
        • 2.a8Q#
        • 2.a8R#
      • 1...h1Q
        • 2.a8Q#
        • 2.a8R#
      • 1...h1B
        • 2.a8Q#
        • 2.a8R#
      • 1...h1R
        • 2.a8Q#
        • 2.a8R#
      • 1...h1S+!
    • 1.a8S?
      • threat
        • 2.Rf8#
      • 1...Kc8
        • 2.Re8#
        • 2.Rf8#
      • 1...h1S+!
  • Keys
    • 1.Rf8+!
      • 1...Kc7
        • 2.a8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);S_FLIGHT::P=S
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • R(D);
      • Threat
        • P=Q
      • Vars
        • P(a);::P=Q
      • Refutation
        • P(a);CHECK
    • Try
      • P(E);
      • Threat
        • R(D)
      • Refutation
        • P(a);CHECK
  • Actual
    • R(D);CHECK
    • Vars
      • K(b);S_FLIGHT::P=S
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