MESON Chess Problem Database

Problem Display
PID: 153201 (R7/5PQ1/4kp2/1K6/8/8/8/5R2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

R7/5PQ1/4kp2/1K6/8/8/8/5R2

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • threat
        • 2.Re8#
        • 2.Qxf6#
      • 1...Ke7
        • 2.Re1#
        • 2.Re8#
        • 2.Qxf6#
        • 2.f8S#
      • 1...f5
        • 2.Re1#
        • 2.Re8#
        • 2.f8S#
      • 1...Ke5!
    • 1.Rd8?
      • threat
        • 2.Qxf6#
      • 1...Ke7
        • 2.Qxf6#
      • 1...f5
        • 2.Re1#
        • 2.f8S#
      • 1...Ke5!
    • 1.Re8+?
      • 1...Kd5
        • 2.Rd1#
      • 1...Kd7
        • 2.f8Q#
      • 1...Kd6!
  • Keys
    • 1.Kc5!
      • 1...Ke5
        • 2.Re8#
      • 1...Kd7
        • 2.f8S#
      • 1...Ke7
        • 2.f8S#
      • 1...f5
        • 2.f8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • R(E);
      • Threat
        • QAR1(D),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • R(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R(A)
        • K(a);S_FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::R(E)
      • K(a);S_FLIGHT::P=S
      • K(a);P-FLIGHT::P=S
      • P(b);::P=S
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