MESON Chess Problem Database

Problem Display
PID: 77651 (4N3/1k2N3/8/4Q3/K7/8/8/8 w - - 0 1)

Ylijoki, Marko

Suomen Tehtavaniekat, 1998

4N3/1k2N3/8/4Q3/K7/8/8/8

#2

4 + 1

5454 Near Snap 2020
3713 Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sc8?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxc8
        • 2.Qc7#
      • 1...Ka8!
    • 1.Qb8+?
      • 1...Ka6
        • 2.Sc7#
      • 1...Kxb8!
  • Keys
    • 1.Sc6!
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qc7#

Anticipated by 208731(1875), 223474(1926), 132484(1964)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XS(C)::QAB1(B)
      • K(a);S_FLIGHT::QAR1(B)
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