MESON Chess Problem Database

Problem Display
PID: 45874 (6K1/7B/8/5Q1N/3k4/P1N5/8/8 w - - 0 1)

Ladeira Filho, JC

Boletim da UBP, 1967

6K1/7B/8/5Q1N/3k4/P1N5/8/8

#2

6 + 1

4883 Still More Fun with Chess Miniatures 2002
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qf4#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Qe4#
        • 2.Qc5#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke3!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Kc5!
    • 1.Qe4+?
      • 1...Kxc3
        • 2.Qb4#
      • 1...Kc5!
    • 1.Qf4+?
      • 1...Kxc3
        • 2.Qb4#
      • 1...Kc5!
    • 1.Qa5?
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke3!
    • 1.Qb5?
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3!
  • Keys
    • 1.Qf8!
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Qf6#

Anticipated by 201694(1922), 223479(1926)

This anticipates 79544(1970), 245479(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAB1(C)
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
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