MESON Chess Problem Database

Problem Display
PID: 219623 (1Q6/8/8/pN2N3/1k1P4/8/8/K7 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1977

1Q6/8/8/pN2N3/1k1P4/8/8/K7

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Ka2?
      • 1...Ka4
        • 2.Sc3#
      • 1...a4!
    • 1.Kb2?
      • threat
        • 2.Sc3#
      • 1...Ka4
        • 2.Sc3#
      • 1...a4!
  • Keys
    • 1.Sc3+!
      • 1...Ka3
        • 2.Sc4#
        • 2.Qb2#
      • 1...Kxc3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • P(b);
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR(E)+S(C)
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • P(b);
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT,XS(C)::QAB1(E)
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