MESON Chess Problem Database

Problem Display
PID: 225157 (2Q5/1B4B1/8/5p2/3P4/4k3/8/4K3 w - - 0 1)

Costikyan, Simon

Chess Life & Review, 1979

2Q5/1B4B1/8/5p2/3P4/4k3/8/4K3

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qc3#
  • Tries
    • 1.Qe6+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kf4!
    • 1.Qc4?
      • 1...f4
        • 2.Qe2#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Kf4!
    • 1.Qc7?
      • threat
        • 2.Qg3#
      • 1...f4
        • 2.Qc3#
      • 1...Kd3!
  • Keys
    • 1.Qg8!
      • 1...Kd3
        • 2.Qb3#
      • 1...Kf4
        • 2.Bh6#
      • 1...f4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • P(b);SBLOCK::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);P-FLIGHT::QAR2(E)
      • K(a);S_FLIGHT::B(D)
      • P(b);SBLOCK::QAR(E)
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