MESON Chess Problem Database

Problem Display
PID: 85799 (3K2Q1/8/8/8/3k4/B5P1/8/1B3N2 w - - 0 1)

Speckmann, Werner

L'Italia Scacchistica, 1971

3K2Q1/8/8/8/3k4/B5P1/8/1B3N2

#2

6 + 1

6490 yacpdb 2009
5454 Near Snap 2026

SOLUTION

  • SOUND
  • Tries
    • 1.Kc7?
      • 1...Ke5
        • 2.Bb2#
      • 1...Kc3!
    • 1.Kd7?
      • 1...Ke5
        • 2.Bb2#
      • 1...Kc3!
    • 1.Ke7?
      • 1...Ke5
        • 2.Bb2#
      • 1...Kc3!
    • 1.Ba2?
      • 1...Kc3
        • 2.Qc4#
      • 1...Kd3
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd5#
      • 1...Ke5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qd3#
      • 1...Kxd5!
    • 1.Qh7?
      • 1...Kc3
        • 2.Qd3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qg4+?
      • 1...Kc3
        • 2.Qb4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5!
  • Keys
    • 1.Qg6!
      • 1...Kc3
        • 2.Qd3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5
        • 2.Qd6#

Anticipated by 182339(1906), 227675(1926)

This anticipates 245975(2015)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(F)
        • K(a);P-FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);P-FLIGHT::QAB1(F)
      • K(a);S_FLIGHT::QAB1(F)
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