MESON Chess Problem Database

Problem Display
PID: 242994 (8/8/1K6/8/1k1P4/N7/1PP5/1n1Q4 w - - 0 1)

Poponin, Vladimir Grigorievich

Zadachi i Etyudi, 2002

8/8/1K6/8/1k1P4/N7/1PP5/1n1Q4

#2

6 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.c3#
    • 1...Sd2
      • 2.c3#
  • Tries
    • 1.Sxb1?
      • 1...Ka4
        • 2.c3#
      • 1...Kc4!
    • 1.Qe2?
      • threat
        • 2.Qc4#
        • 2.Qb5#
      • 1...Ka4
        • 2.Qc4#
        • 2.Qb5#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sxa3!
    • 1.Qh5?
      • threat
        • 2.Qa5#
        • 2.Qb5#
      • 1...Ka4
        • 2.Qa5#
        • 2.Qb5#
      • 1...Sc3
        • 2.Qa5#
      • 1...Sxa3!
    • 1.Qf1?
      • threat
        • 2.Qc4#
        • 2.Qb5#
      • 1...Ka4
        • 2.Qc4#
        • 2.Qb5#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sxa3!
    • 1.d5?
      • threat
        • 2.Qg4#
        • 2.Qd4#
      • 1...Ka4
        • 2.Qg4#
        • 2.Qd4#
        • 2.c3#
      • 1...Sd2
        • 2.c3#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sxa3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qb3#
      • 1...Ka4
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qb3#
      • 1...Sxa3
        • 2.Qb3#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sc3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAB(A)+P(C)
    • S(a);N_GUARD::P(C)
  • Tries
    • Try
      • S(D);XS(a)
      • Vars
        • K(b);P-FLIGHT::QAB(A)+P(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
      • Refutation
        • S(a);XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(A)
      • Refutation
        • S(a);XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
      • Refutation
        • S(a);XS(D)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::P(C)
        • S(a);::QAR2(A)
      • Refutation
        • S(a);XS(D)
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • S(a);XS(D)::QAR1(A)
      • S(a);::QAR1(A)
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