MESON Chess Problem Database

Problem Display
PID: 189694 (8/1R1Pk1p1/6K1/8/1NN5/8/8/8 w - - 0 1)

Keirans, Peteris

Dzimtenes Vestnesis, 1912

8/1R1Pk1p1/6K1/8/1NN5/8/8/8

#2

5 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.d8S#
    • 1...Kd8
      • 2.Sc6#
    • 1...Kf8
      • 2.d8Q#
      • 2.d8R#
  • Tries
    • 1.Kxg7?
      • 1...Kd8
        • 2.Sc6#
      • 1...Ke6!
    • 1.Sc6+?
      • 1...Kf8
        • 2.Rb8#
        • 2.d8Q#
        • 2.d8R#
      • 1...Ke6!
    • 1.Rc7?
      • 1...Ke6
        • 2.d8S#
      • 1...Kf8
        • 2.d8Q#
        • 2.d8R#
      • 1...Kd8!
    • 1.d8Q+?
      • 1...Ke6
        • 2.Rb6#
        • 2.Re7#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qd7#
        • 2.Qc8#
        • 2.Qe8#
        • 2.Qg8#
      • 1...Kxd8!
    • 1.d8R+?
      • 1...Ke6
        • 2.Rd6#
        • 2.Re8#
      • 1...Kxd8!
  • Keys
    • 1.Ra7!
      • 1...Ke6
        • 2.d8S#
      • 1...Kd8
        • 2.Sc6#
      • 1...Kf8
        • 2.d8Q#
        • 2.d8R#

FEATURES

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