MESON Chess Problem Database

Problem Display
PID: 24689 (8/6K1/8/5k2/2Q5/5N2/4PnP1/8 w - - 0 1)

Popov, Valery

1st Prize, Borovich CC, 1987

8/6K1/8/5k2/2Q5/5N2/4PnP1/8

#2

5 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.g4#
    • 1...Sh1
      • 2.g4#
    • 1...Sd3
      • 2.g4#
    • 1...Sh3
      • 2.g4#
  • Tries
    • 1.Qd5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kf4!
    • 1.e3?
      • 1...Se4
        • 2.Qc8#
      • 1...Sd1
        • 2.g4#
      • 1...Sh1
        • 2.g4#
      • 1...Sd3
        • 2.g4#
      • 1...Sh3
        • 2.g4#
      • 1...Sg4!
  • Keys
    • 1.g3!
      • 1...Se4
        • 2.Qc8#
      • 1...Sg4
        • 2.e4#
      • 1...Sd1
        • 2.g4#
      • 1...Sh1
        • 2.g4#
      • 1...Sd3
        • 2.g4#
      • 1...Sh3
        • 2.g4#

Anticipated by 4877(1892), 4954(1895), 143573(1895), 178120(1900), 9524(1905), 49145(1906), 99168(1912), 16389(1940), 158101(1983)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(B)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(A);
      • Vars
        • S(a);SBLOCK::QAB(D)
        • S(a);N_GUARD::P(B)
      • Refutation
        • S(a);
  • Actual
    • P(B);
    • Vars
      • S(a);SBLOCK::QAB(D)
      • S(a);N_GUARD,SBLOCK::P(A)
      • S(a);N_GUARD::P(B)
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Developed and maintained by Brian Stephenson.
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