MESON Chess Problem Database

Problem Display
PID: 118735 (8/2B2K1p/8/6k1/8/7Q/8/8 w - - 0 1)

Stepanov, Petr Aleksandrovich

Na Smenu!, 1985

8/2B2K1p/8/6k1/8/7Q/8/8

#2

3 + 2

6490 yacpdb 2009
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qg4+?
      • 1...Kh6
        • 2.Bf4#
        • 2.Qh4#
      • 1...Kxg4!
    • 1.Qg3+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh6
        • 2.Qh4#
      • 1...Kh5!
    • 1.Qh4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxh4!
  • Keys
    • 1.Qf3!
      • 1...Kh4
        • 2.Bd8#
      • 1...Kh6
        • 2.Bf4#
      • 1...h6
        • 2.Bd8#
      • 1...h5
        • 2.Qf4#

Anticipated by 156629(1937)

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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