MESON Chess Problem Database

Problem Display
PID: 267092 (4K3/4P3/NN2p1p1/4k1p1/6P1/3PpQ2/4B3/8 w - - 0 1)

Liebeck, Professor Hans

The Problemist, 1955

4K3/4P3/NN2p1p1/4k1p1/6P1/3PpQ2/4B3/8

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sc4#
  • Tries
    • 1.Kd8?
      • 1...Kd6
        • 2.Sc4#
      • 1...Kd4!
    • 1.Sa4?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kd6!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Sc4#
        • 2.Sc8#
      • 1...Kf6!
    • 1.Qf1?
      • 1...Kd4
        • 2.Qa1#
      • 1...Kd6!
    • 1.Qxe3+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6!
    • 1.d4+?
      • 1...Kd6
        • 2.Sc4#
        • 2.Sc8#
      • 1...Kxd4!
  • Keys
    • 1.Qh1!
      • 1...Kd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Qh2#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::S(F)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(a)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(B)
  • Actual
    • Q(C);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB(C)
      • K(b);N_GUARD,S_FLIGHT::S(F)
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