MESON Chess Problem Database

Problem Display
PID: 156629 (8/p1K5/4B3/1k6/8/Q7/8/8 w - - 0 1)

Andersson, Gunnar

Tidskrift for Schack, 1937

8/p1K5/4B3/1k6/8/Q7/8/8

#2

3 + 2

5454 Near Snap 2016
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4+?
      • 1...Ka6
        • 2.Bc4#
        • 2.Bc8#
        • 2.Qa4#
      • 1...Kxb4!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Ka5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kxa4!
  • Keys
    • 1.Qc3!
      • 1...Ka4
        • 2.Bd7#
      • 1...Ka6
        • 2.Bc4#
      • 1...a6
        • 2.Bd7#
      • 1...a5
        • 2.Qc4#

This anticipates 118735(1985)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(B)
      • P(b);SBLOCK::B(B)
      • P(b);SBLOCK::QAB1(A)
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