MESON Chess Problem Database

Problem Display
PID: 195205 (8/4N3/1pN5/8/2k2K2/Q7/8/8 w - - 0 1)

Robinson, Frank

Brisbane Courier, 1918

8/4N3/1pN5/8/2k2K2/Q7/8/8

#2

4 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Ke5?
      • 1...b5
        • 2.Sa5#
      • 1...Kb5!
    • 1.Se5+?
      • 1...Kd4
        • 2.Qb4#
        • 2.Qe3#
      • 1...Kb5!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Qd5#
        • 2.Qb4#
      • 1...Kxb3!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kxd3!
  • Keys
    • 1.Qb2!
      • 1...Kd3
        • 2.Se5#
      • 1...Kc5
        • 2.Qb4#
      • 1...b5
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);N_GUARD,SBLOCK::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::S(C)
      • K(a);P-FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR2(A)
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