MESON Chess Problem Database

Problem Display
PID: 261931 (4k3/6p1/3Q4/6K1/6N1/p7/B7/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Problemnoter, 1964

4k3/6p1/3Q4/6K1/6N1/p7/B7/8

#2

4 + 3

5454 Near Snap 2022
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Kf4?
      • 1...g6
        • 2.Sf6#
      • 1...g5+!
    • 1.Kh4?
      • 1...g6
        • 2.Sf6#
      • 1...g5+!
    • 1.Kf5?
      • 1...g5
        • 2.Sf6#
      • 1...g6+!
    • 1.Kh5?
      • 1...g5
        • 2.Sf6#
      • 1...g6+!
    • 1.Bb1?
      • threat
        • 2.Bg6#
      • 1...g6
        • 2.Bxg6#
      • 1...Kf7!
    • 1.Bb3?
      • 1...g6
        • 2.Sf6#
      • 1...a2!
    • 1.Bc4?
      • 1...g6
        • 2.Sf6#
      • 1...a2!
    • 1.Bd5?
      • 1...g6
        • 2.Sf6#
      • 1...a2!
    • 1.Be6?
      • 1...g6
        • 2.Sf6#
      • 1...a2!
    • 1.Bg8?
      • 1...g6
        • 2.Sf6#
      • 1...a2!
    • 1.Qc7?
      • 1...Kf8
        • 2.Qd8#
        • 2.Qf7#
      • 1...g6!
    • 1.Qe6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
    • 1.Qd7+?
      • 1...Kf8
        • 2.Qf7#
        • 2.Qd8#
      • 1...Kxd7!
  • Keys
    • 1.Se5!
      • 1...g6
        • 2.Bf7#

This anticipates 167741(1995)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • P(b);::B(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Refutation
        • P(b);
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(D)
  • Actual
    • S(B);
    • Vars
      • P(b);::B(A)
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