MESON Chess Problem Database

Problem Display
PID: 67942 (8/1R2R1pK/B7/2B2kP1/3p3Q/1p2p3/2b3qp/5r1N w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Phenix, 1999

8/1R2R1pK/B7/2B2kP1/3p3Q/1p2p3/2b3qp/5r1N

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sg3#
    • 1...Qd5
      • 2.Sg3#
    • 1...Qc6
      • 2.Sg3#
    • 1...Qxb7
      • 2.Sg3#
    • 1...Qd2
      • 2.Sg3#
    • 1...Qe2
      • 2.Sg3#
    • 1...Qg3
      • 2.Sxg3#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Re5#
      • 1...Qxg5
        • 2.Rb5#
      • 1...Qe4
        • 2.Sg3#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qg4!
    • 1.Bd6?
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Sg3#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qg4
        • 2.Rb5#
      • 1...Qxg5!
    • 1.Bd3+?
      • 1...Qe4
        • 2.Sg3#
      • 1...Bxd3!
    • 1.Rb6?
      • threat
        • 2.Bc8#
      • 1...Qe4
        • 2.Sg3#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qc6
        • 2.Sg3#
      • 1...Qb7
        • 2.Sg3#
      • 1...Qa8
        • 2.Sg3#
      • 1...Qg4!
    • 1.Rb8?
      • threat
        • 2.Bc8#
        • 2.Rf8#
      • 1...Qg4
        • 2.Rf8#
      • 1...Qe4
        • 2.Sg3#
        • 2.Rf8#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qc6
        • 2.Sg3#
      • 1...Qb7
        • 2.Sg3#
        • 2.Rf8#
      • 1...Qa8
        • 2.Sg3#
        • 2.Bc8#
      • 1...Qxg5!
    • 1.Re8?
      • threat
        • 2.Rf7#
      • 1...Qxb7
        • 2.Sg3#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qc6
        • 2.Sg3#
      • 1...Qxg5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Bc8#
      • 1...Qxg5
        • 2.Bxd4#
      • 1...Qg4
        • 2.Bd6#
      • 1...Qe4
        • 2.Sg3#
      • 1...Qd5
        • 2.Sg3#
      • 1...Qc6
        • 2.Sg3#
      • 1...Qb7
        • 2.Sg3#
      • 1...Qa8
        • 2.Sg3#

This is a version of 29673

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::S(A)
    • Q(c);N_GUARD,XR(F)::S(A)
    • Q(c);N_GUARD::S(A),XQ(c)
  • Tries
    • Try
      • B(C);XP(g)
      • Threat
        • R1(G)
      • Vars
        • Q(c);N_GUARD,XP(D)::R(F)
        • Q(c);N_GUARD::S(A)
        • Q(c);N_GUARD::S(A),XQ(c)
      • Refutation
        • Q(c);
    • Try
      • B(C);
      • Threat
        • R1(G)
      • Vars
        • Q(c);N_GUARD::S(A)
        • Q(c);N_GUARD::S(A),XQ(c)
        • Q(c);N_GUARD::R(F)
      • Refutation
        • Q(c);XP(D)
    • Try
      • B(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::S(A)
      • Refutation
        • B(b);XB(E)
    • Try
      • R(F);
      • Threat
        • B(E)
      • Vars
        • Q(c);N_GUARD::S(A)
      • Refutation
        • Q(c);
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::R(F)
        • Q(c);N_GUARD::S(A)
      • Refutation
        • Q(c);XP(D)
    • Try
      • R(G);
      • Threat
        • R(F)
      • Vars
        • Q(c);N_GUARD,XR(F)::S(A)
        • Q(c);N_GUARD::S(A)
      • Refutation
        • Q(c);XP(D)
  • Actual
    • R(F);
    • Threat
      • B(E)
    • Vars
      • Q(c);N_GUARD,XP(D)::R(F)+B(C),XP(g)
      • Q(c);N_GUARD::R(F)+B(C)
      • Q(c);N_GUARD::S(A)
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