MESON Chess Problem Database

Problem Display
PID: 233819 (Q7/5N2/1P5B/3p4/P3k1P1/7K/8/2N5 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Tidskrift for Schack, 1915

Q7/5N2/1P5B/3p4/P3k1P1/7K/8/2N5

#2

8 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5?
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Qf5#
        • 2.Qa8#
      • 1...Kf3!
    • 1.Qa6?
      • threat
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
      • 1...d4
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kd4!
    • 1.Qb8?
      • threat
        • 2.Qf4#
      • 1...Kf3
        • 2.Qf4#
      • 1...d4
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kd4!
    • 1.Qc8?
      • 1...Kf3
        • 2.Qf5#
      • 1...d4
        • 2.Qf5#
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Kd4!
    • 1.Qe8+?
      • 1...Kf3
        • 2.Qe2#
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qh8?
      • 1...d4
        • 2.Qa8#
      • 1...Kf3!
  • Keys
    • 1.Qf8!
      • 1...Kf3
        • 2.Sd6#
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);N_PINP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);N_PINP(b)
      • Threat
        • QAB1(H)
      • Vars
        • K(a);S_FLIGHT::QAB1(H)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);N_PINP(b)
      • Threat
        • QAR1(H)
      • Vars
        • K(a);S_FLIGHT::QAR1(H)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAR2(H)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);CHECK,N_PINP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);N_PINP(b)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(H);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAR(H)+S(G)
      • K(a);P-FLIGHT::QAR2(H)
      • P(b);OGATEB,SBLOCK::QAB(H)
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