MESON Chess Problem Database

Problem Display
PID: 251876 (1qQ5/2rp2R1/B1pN4/2P5/3kPP2/Bp6/3P4/N5K1 w - - 0 1)

Vilkauskas, Antanas

Schach, 1987

1qQ5/2rp2R1/B1pN4/2P5/3kPP2/Bp6/3P4/N5K1

#2

11 + 6

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Sxb3#
    • 1...Qa8
      • 2.Sxb3#
    • 1...Qxc8
      • 2.Sxb3#
    • 1...b2
      • 2.Sc2#
  • Tries
    • 1.Rg3?
      • threat
        • 2.Rd3#
      • 1...Qb5
        • 2.Qh8#
      • 1...Qb4!
    • 1.Rg5?
      • threat
        • 2.Bb2#
      • 1...Qb4
        • 2.Qh8#
      • 1...b2
        • 2.Sc2#
      • 1...Qb5!
    • 1.Qxb8?
      • threat
        • 2.Sxb3#
        • 2.Qb4#
      • 1...b2
        • 2.Sc2#
        • 2.Sb3#
        • 2.Qxb2#
        • 2.Qb4#
      • 1...Rb7!
    • 1.Qe8?
      • threat
        • 2.Sf5#
        • 2.Qe5#
      • 1...Qxe8
        • 2.Sxb3#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qb5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Rg8#
      • 1...Qxh8
        • 2.Sxb3#
      • 1...Qb4
        • 2.Rg5#
      • 1...Qb5
        • 2.Rg3#
      • 1...Qd8
        • 2.Sxb3#
      • 1...Qe8
        • 2.Sxb3#
      • 1...Qf8
        • 2.Sxb3#
      • 1...Qg8
        • 2.Rxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD::S(A),XP(a)
    • Q(f);N_GUARD,XQ(K)::S(A),XP(a)
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • R(J);
      • Threat
        • R1(J)
      • Vars
        • Q(f);N_GUARD::QAB(K)
      • Refutation
        • Q(f);
    • Try
      • R(J);
      • Threat
        • B(D)
      • Vars
        • Q(f);N_GUARD::QAB(K)
        • P(a);N_GUARD::S(A)
      • Refutation
        • Q(f);
    • Try
      • Q(K);XQ(f)
      • Threat
        • DUALS(2)
      • Refutation
        • R(d);
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_GUARD,XQ(K)::S(A),XP(a)
        • Q(f);::QAB1(K)
      • Refutation
        • Q(f);
  • Actual
    • Q(K);
    • Threat
      • QAB(K)+R(J)
    • Vars
      • Q(f);N_GUARD,XQ(K)::S(A),XP(a)
      • Q(f);N_GUARD::QAB(K)+R(J)
      • Q(f);N_GUARD::S(A),XP(a)
      • Q(f);P_PINR(J)::QAB(K)+R(J),XQ(f)
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