MESON Chess Problem Database

Problem Display
PID: 183644 (Rn3r2/1Q1p4/1P2P3/B7/RnP2k2/1N3N1B/p3K2P/8 w - - 0 1)

Makaronets, Leonid

Best Problems, 2018

Rn3r2/1Q1p4/1P2P3/B7/RnP2k2/1N3N1B/p3K2P/8

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Bd2#
    • 1...Sd5
      • 2.cxd5#
    • 1...S4a6
      • 2.Bd2#
    • 1...S8a6
      • 2.Rxf8#
  • Tries
    • 1.Sbd2?
      • threat
        • 2.Qe4#
      • 1...Sd5
        • 2.cxd5#
      • 1...S8c6
        • 2.Rxf8#
      • 1...d5
        • 2.Qc7#
      • 1...S4c6!
    • 1.Qc7+?
      • 1...Ke4
        • 2.Sbd2#
        • 2.Sc5#
        • 2.Sfd2#
        • 2.Sg5#
        • 2.Qe5#
      • 1...d6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qe4#
      • 1...Sd5
        • 2.cxd5#
      • 1...S4c6
        • 2.Bd2#
      • 1...S8c6
        • 2.Rxf8#
      • 1...d5
        • 2.Qc7#

This is after 166986

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);OGATE::B(H)
    • S(b);OGATE::R(F)+P(G),XS(b)
    • S(e);OGATE::R(L),XR(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(K)
      • Vars
        • S(b);OGATE::R(F)+P(G),XS(b)
        • S(e);OGATE::R(L),XR(f)
        • P(d);N_GUARD::QAB(K)
      • Refutation
        • S(b);
    • Try
      • Q(K);CHECK
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(C);
    • Threat
      • QAR1(K)
    • Vars
      • S(b);OGATE::R(F)+P(G),XS(b)
      • S(b);OGATE::B(H)
      • S(e);OGATE::R(L),XR(f)
      • P(d);N_GUARD::QAB(K)
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