MESON Chess Problem Database

Problem Display
PID: 212651 (8/8/p1K4B/8/nkN5/8/Q7/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1968

8/8/p1K4B/8/nkN5/8/Q7/8

#2

4 + 3

15148 Sadier Collection 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Bd2#
    • 1...Sc3
      • 2.Bf8#
    • 1...Sc5
      • 2.Bd2#
    • 1...Sb6
      • 2.Bd2#
  • Tries
    • 1.Sb6?
      • 1...Ka5
        • 2.Bd2#
        • 2.Qxa4#
      • 1...Sxb6
        • 2.Bd2#
      • 1...a5
        • 2.Sd5#
      • 1...Sb2
        • 2.Sd5#
        • 2.Bd2#
      • 1...Sc3
        • 2.Bf8#
      • 1...Sc5
        • 2.Sd5#
        • 2.Bd2#
      • 1...Kc3!
  • Keys
    • 1.Sa5!
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxa5
        • 2.Bd2#
      • 1...Sb2
        • 2.Bd2#
      • 1...Sc3
        • 2.Bf8#
      • 1...Sc5
        • 2.Bd2#
      • 1...Sb6
        • 2.Bd2#

This anticipates 160084(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::B(D)
    • S(a);N_GUARD,SBLOCK::B(D)
  • Tries
    • Try
      • S(B);
      • Vars
        • S(a);N_GUARD,XS(B)::B(D)
        • P(c);SBLOCK::S(B)
        • S(a);N_GUARD,SBLOCK::B(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P_SPINS(a),S_FLIGHT,XS(B)::B(D)
      • S(a);N_GUARD::B(D)
      • S(a);N_GUARD,SBLOCK::B(D)
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