MESON Chess Problem Database

Problem Display
PID: 102280 (6B1/8/8/6K1/1Q6/8/1pkB4/b7 w - - 0 1)

Lindgren, Frithiof

Nya Dagligt Allehanda, 1927

6B1/8/8/6K1/1Q6/8/1pkB4/b7

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb1
      • 2.Qe4#
  • Tries
    • 1.Be3?
      • 1...Kb1
        • 2.Qe4#
      • 1...Kd1
        • 2.Qd2#
      • 1...b1Q
        • 2.Qd2#
      • 1...b1S
        • 2.Qb3#
      • 1...b1B
        • 2.Qd2#
        • 2.Qb3#
      • 1...b1R
        • 2.Qd2#
      • 1...Kd3!
    • 1.Bb3+?
      • 1...Kb1
        • 2.Qe4#
      • 1...Kd3!
    • 1.Qc3+?
      • 1...Kb1
        • 2.Qd3#
      • 1...Kd1!
    • 1.Qb3+?
      • 1...Kb1
        • 2.Bh7#
        • 2.Qd1#
        • 2.Qd3#
      • 1...Kxd2!
  • Keys
    • 1.Bf4!
      • 1...Kb1
        • 2.Qe4#
      • 1...Kd1
        • 2.Qd2#
      • 1...Kd3
        • 2.Qc4#
      • 1...b1Q
        • 2.Qd2#
      • 1...b1S
        • 2.Qb3#
      • 1...b1B
        • 2.Qd2#
        • 2.Qb3#
      • 1...b1R
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINP(b),S_FLIGHT::QAB(B)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAB(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);P-FLIGHT,XB(A)
  • Actual
    • B(A);
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAB(B)
      • K(c);S_FLIGHT::QAR1(B)
      • K(c);S_FLIGHT::QAB1(B)
      • P(b);SBLOCK::QAR1(B)
      • P(b);::QAB1(B)
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