MESON Chess Problem Database

Problem Display
PID: 272312 (7b/1bpN4/5p1Q/1pBk4/8/3N1P2/2K5/3R4 w - - 0 1)

Stakheev, Alexey

Mat, 1980

7b/1bpN4/5p1Q/1pBk4/8/3N1P2/2K5/3R4

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sb2#
    • 1...Kc6
      • 2.Sb4#
      • 2.S3e5#
    • 1...f5
      • 2.S3e5#
  • Tries
    • 1.Sb4+?
      • 1...Kc4
        • 2.Rd4#
      • 1...Ke6!
    • 1.Sf4+?
      • 1...Kc4
        • 2.Rd4#
      • 1...Kc6!
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Sb2#
        • 2.Qd4#
      • 1...Kc6
        • 2.Sb4#
        • 2.Qe6#
      • 1...f5!
    • 1.Qh3?
      • threat
        • 2.S3e5#
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Sb4#
        • 2.Qe6#
      • 1...f5!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Sb4#
        • 2.Sb8#
      • 1...Ke6
        • 2.Sf4#
        • 2.Sf8#
      • 1...f5!
    • 1.Qxf6?
      • threat
        • 2.Sb2#
        • 2.S3e5#
      • 1...Kc4
        • 2.Sb2#
        • 2.S3e5#
      • 1...Bxf6!
    • 1.Qh7?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Sb4#
      • 1...Ke6
        • 2.Sf4#
      • 1...f5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Sb4#
        • 2.S3e5#
      • 1...Ke6
        • 2.Sf4#
      • 1...f5
        • 2.S3e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::S(C)
    • P(c);::R(A)+S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • R(A)+S(C)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • P(c);
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(F);XP(c)
      • Threat
        • DUALS(2)
      • Refutation
        • B(f);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • P(c);
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::S(C)
      • K(b);N_GUARD,P_SPINP(c),S_FLIGHT::S(C)
      • P(c);::R(A)+S(C)
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