MESON Chess Problem Database

Problem Display
PID: 85820 (8/4p3/4K2p/7k/6N1/6Q1/6P1/8 w - - 0 1)

Speckmann, Werner

Sachove umeni (Ceskoslovensky sach), 1967

8/4p3/4K2p/7k/6N1/6Q1/6P1/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Sf6#
    • 1...Kg6
      • 2.Sf6#
  • Tries
    • 1.Ke5?
      • 1...Kg5
        • 2.Sf6#
      • 1...e6
        • 2.Sf6#
      • 1...Kg6!
    • 1.Kf7?
      • 1...e5
        • 2.Sf6#
      • 1...e6
        • 2.Sf6#
      • 1...Kg5!
    • 1.Qh4+?
      • 1...Kg6
        • 2.Qxh6#
      • 1...Kxh4!
    • 1.Qh3+?
      • 1...Kg6
        • 2.Qxh6#
      • 1...Kg5!
  • Keys
    • 1.Qf4!
      • 1...Kh4
        • 2.Sf6#
      • 1...Kg6
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR(B)+S(C)
    • K(a);S_FLIGHT::QAR(B)+S(C)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR(B)+S(C)
        • P(c);N_GUARD::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(c);N_GUARD::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR(B)+S(C)
      • K(a);S_FLIGHT::QAR1(B),XP(b)
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