MESON Chess Problem Database

Problem Display
PID: 170484 (1Q6/2pp4/3k3B/5P2/3K4/8/8/8 w - - 0 1)

Bitterli, Simon

Basler Nachrichten, 1959

1Q6/2pp4/3k3B/5P2/3K4/8/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qf8#
  • Tries
    • 1.Bg7?
      • 1...Ke7
        • 2.Qf8#
      • 1...Kc6!
    • 1.Qa7?
      • threat
        • 2.Qc5#
      • 1...c5+
        • 2.Qxc5#
      • 1...Kc6
        • 2.Qa6#
      • 1...c6
        • 2.Bf8#
      • 1...Ke7!
    • 1.Qb4+?
      • 1...c5+
        • 2.Qxc5#
      • 1...Kc6!
    • 1.Qb5?
      • threat
        • 2.Bf8#
        • 2.Qc5#
      • 1...c5+
        • 2.Qxc5#
      • 1...c6
        • 2.Qe5#
      • 1...Ke7!
  • Keys
    • 1.Qc8!
      • 1...c5+
        • 2.Qxc5#
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke7
        • 2.Qf8#
      • 1...c6
        • 2.Bf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB1(D)
  • Tries
    • Try
      • B(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(D);N_PINP(b)
      • Threat
        • QAB1(D)
      • Vars
        • P(b);CHECK::QAB1(D),XP(b)
        • K(a);P-FLIGHT::QAR2(D)
        • P(b);SBLOCK::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Vars
        • P(b);CHECK,P_SPINP(b)::QAB1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK::QAB1(D),XP(b)
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);N_PINP(b)
    • Vars
      • P(b);CHECK,OGATE::QAB1(D),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
      • K(a);S_FLIGHT::QAB1(D)
      • P(b);::B(C)
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Developed and maintained by Brian Stephenson.
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