MESON Chess Problem Database

Problem Display
PID: 219824 (8/8/1Q6/1pN5/2k5/5B2/1K6/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1977

8/8/1Q6/1pN5/2k5/5B2/1K6/8

#2

4 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd3?
      • 1...b4
        • 2.Se5#
      • 1...Kxd3!
    • 1.Se6?
      • threat
        • 2.Qd4#
      • 1...Kd3
        • 2.Qd4#
      • 1...b4
        • 2.Qa6#
      • 1...Kb4!
    • 1.Qd6?
      • 1...b4
        • 2.Be2#
      • 1...Kb4!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Qd4#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kb4
        • 2.Qd4#
      • 1...b4
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • P(b);::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(C);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(D);
      • Vars
        • P(b);SBLOCK::B(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
      • P(b);OGATEB,SBLOCK::QAB(D)
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