MESON Chess Problem Database

Problem Display
PID: 233220 (4r2B/3Q1R2/8/1B2p3/1Kn4p/3Pk2r/2R5/8 w - - 0 1)

Makaronets, Leonid

Freie Presse, 1987

4r2B/3Q1R2/8/1B2p3/1Kn4p/3Pk2r/2R5/8

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qa7#
    • 1...Sa3
      • 2.Qa7#
    • 1...Sa5
      • 2.Qa7#
    • 1...Sd6
      • 2.Qa7#
    • 1...e4
      • 2.Qxh3#
      • 2.Qd4#
  • Tries
    • 1.Rff2?
      • threat
        • 2.Rce2#
      • 1...Sd2
        • 2.Qa7#
      • 1...Sd6
        • 2.Qa7#
      • 1...Rf3!
    • 1.Qd5?
      • threat
        • 2.Qe4#
      • 1...Sd6
        • 2.Qc5#
      • 1...e4
        • 2.Qd4#
      • 1...Sd2!
    • 1.Qa7+?
      • 1...Sb6
        • 2.Qxb6#
      • 1...Kxd3!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Sd2
        • 2.Qf2#
      • 1...Sd6
        • 2.Qf2#
      • 1...e4
        • 2.Qxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::QAB(E)
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(A)
      • Vars
        • S(c);N_GUARD::QAB(E)
      • Refutation
        • R(b);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(c);::QAB(E)
        • P(e);N_GUARD::QAB1(E)
      • Refutation
        • S(c);
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(E),XS(c)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(c),XP(B)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);P_SPINP(e),S_FLIGHT::QAR1(E)
      • S(c);::QAB1(E)
      • P(e);::QAR(E),XR(b)
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