MESON Chess Problem Database

Problem Display
PID: 267231 (8/8/K1p5/1p6/pk6/5Q2/B7/2N5 w - - 0 1)

Grinchenko, Dmitry

Die Schwalbe, 1975

8/8/K1p5/1p6/pk6/5Q2/B7/2N5

#2

4 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Kb6?
      • 1...a3
        • 2.Qb3#
      • 1...c5!
    • 1.Se2?
      • threat
        • 2.Qc3#
      • 1...Kc5
        • 2.Qf8#
      • 1...a3!
    • 1.Qxc6?
      • 1...Ka3
        • 2.Qc3#
      • 1...a3!
    • 1.Qe3?
      • 1...a3
        • 2.Qd4#
      • 1...c5!
  • Keys
    • 1.Qf6!
      • 1...Ka3
        • 2.Qc3#
      • 1...Kc5
        • 2.Sd3#
      • 1...c5
        • 2.Qb2#
      • 1...a3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(d);
    • Try
      • S(A);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);S_CUTP(d),S_FLIGHT::QAB(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);XP(d)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Vars
        • P(a);SBLOCK::QAR2(C)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAR2(C)
      • K(b);N_GUARD,S_FLIGHT::S(A)
      • P(d);SBLOCK::QAR2(C)
      • P(a);SBLOCK::QAR2(C)
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