MESON Chess Problem Database

Problem Display
PID: 29673 (3R4/2p3R1/2P4B/P1k2B2/Q3p3/3p4/1qr4p/N5bK w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

3rd Comm., Barulin-100 MT, 1999

3R4/2p3R1/2P4B/P1k2B2/Q3p3/3p4/1qr4p/N5bK

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sb3#
    • 1...Qd4
      • 2.Sb3#
    • 1...Qe5
      • 2.Sb3#
    • 1...Qf6
      • 2.Sb3#
    • 1...Qxg7
      • 2.Sb3#
    • 1...Qb3
      • 2.Sxb3#
  • Tries
    • 1.Be3+?
      • 1...Qd4
        • 2.Sb3#
      • 1...Bxe3!
    • 1.Rg6?
      • threat
        • 2.Bf8#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qf6
        • 2.Sb3#
      • 1...Qg7
        • 2.Sb3#
      • 1...Qh8
        • 2.Sb3#
      • 1...Qb4!
    • 1.Rxc7?
      • threat
        • 2.Bf8#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qf6
        • 2.Sb3#
      • 1...Qg7
        • 2.Sb3#
      • 1...Qh8
        • 2.Sb3#
      • 1...Qb4!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Bf8#
      • 1...Qb4
        • 2.Be6#
      • 1...Qb5
        • 2.Bxe4#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qf6
        • 2.Sb3#
      • 1...Qg7
        • 2.Sb3#
      • 1...Qh8
        • 2.Sb3#

This is a version of 205608

There are these versions: 67942

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::S(A)
    • Q(b);N_GUARD,XR(H)::S(A)
    • Q(b);N_GUARD::S(A),XQ(b)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::S(A)
      • Refutation
        • B(a);XB(G)
    • Try
      • R(H);
      • Threat
        • B(G)
      • Vars
        • Q(b);N_GUARD::S(A)
      • Refutation
        • Q(b);
    • Try
      • R(H);XP(h)
      • Threat
        • B(G)
      • Vars
        • Q(b);N_GUARD::S(A)
      • Refutation
        • Q(b);
  • Actual
    • R(H);
    • Threat
      • B(G)
    • Vars
      • Q(b);N_GUARD::R(H)+B(E)
      • Q(b);N_GUARD::R(H)+B(E),XP(f)
      • Q(b);N_GUARD::S(A)
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