MESON Chess Problem Database

Problem Display
PID: 183499 (8/3B4/1p1kP1P1/8/N5P1/2K5/5Q2/8 w - - 0 1)

Grupen, Claus

Problem Observer, 2016

8/3B4/1p1kP1P1/8/N5P1/2K5/5Q2/8

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd4#
    • 1...Ke5
      • 2.Qd4#
    • 1...Kc7
      • 2.Qxb6#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Kd3?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qxb6#
      • 1...b5
        • 2.Qc5#
      • 1...Ke7!
    • 1.Qg1?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qxb6#
      • 1...b5
        • 2.Qc5#
      • 1...Ke7!
    • 1.Qe3?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qxb6#
      • 1...b5
        • 2.Qc5#
      • 1...Ke7!
    • 1.Qd4+?
      • 1...Kc7
        • 2.Qxb6#
      • 1...Ke7!
    • 1.Qxb6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Ke7!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke7!
  • Keys
    • 1.g7!
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qxb6#
      • 1...Ke7
        • 2.Qf8#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(A)
    • K(b);S_FLIGHT::QAB1(A)
    • K(b);S_FLIGHT::QAB1(A),XP(a)
    • P(a);N_GUARD::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAB1(A),XP(a)
        • P(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAB1(A),XP(a)
        • P(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A),XP(a)
        • P(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(F);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAB1(A),XP(a)
      • P(a);N_GUARD::QAB1(A)
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