MESON Chess Problem Database

Problem Display
PID: 61856 (8/4K3/4N3/8/2N1kP2/5pQ1/8/8 w - - 0 1)

Poisson, Christian

diagrammes, 1989

8/4K3/4N3/8/2N1kP2/5pQ1/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Sd6#
  • Tries
    • 1.Sb2?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kd5
        • 2.Qxf3#
      • 1...f2
        • 2.Qd3#
      • 1...Kf5!
  • Keys
    • 1.Se5!
      • 1...Ke3
        • 2.Qe1#
      • 1...Kd5
        • 2.Qxf3#
      • 1...Kf5
        • 2.Qg6#
      • 1...f2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(B)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
        • K(b);S_FLIGHT::QAB(A),XP(a)
        • P(a);OGATE::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • K(b);S_FLIGHT::QAB(A),XP(a)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);OGATE::QAB1(A)
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