MESON Chess Problem Database

Problem Display
PID: 254970 (8/2K5/1P3p2/Q4p2/P1Bk1p2/1P1N1p2/4nP2/4R3 w - - 0 1)

Neptaev, Nikolai I

Sukhodolov, Nikolai

Zadachi i Etyudi, 2006

8/2K5/1P3p2/Q4p2/P1Bk1p2/1P1N1p2/4nP2/4R3

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qd5#
    • 1...Sc3
      • 2.Qc5#
  • Tries
    • 1.Sb4?
      • 1...Ke4
        • 2.Qd5#
      • 1...Sg1
        • 2.Sc2#
        • 2.Sc6#
      • 1...Sc1
        • 2.Sc2#
        • 2.Sc6#
      • 1...Sc3
        • 2.Sc2#
        • 2.Sc6#
      • 1...Sg3
        • 2.Sc2#
        • 2.Sc6#
      • 1...Kc3!
    • 1.Se5?
      • 1...Ke4
        • 2.Qd5#
      • 1...Sg1
        • 2.Sc6#
      • 1...Sc1
        • 2.Sxf3#
        • 2.Sc6#
      • 1...Sc3
        • 2.Sxf3#
        • 2.Sc6#
      • 1...Sg3
        • 2.Sxf3#
        • 2.Sc6#
      • 1...fxe5!
    • 1.Ba6?
      • 1...Sg1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sg3
        • 2.Qc5#
      • 1...Ke4!
    • 1.Qd2?
      • 1...Ke4
        • 2.Qxf4#
      • 1...Sg1
        • 2.Qb2#
      • 1...Sc1
        • 2.Qb2#
      • 1...Sg3
        • 2.Qb2#
      • 1...Sc3!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qd5#
      • 1...Kc3!
    • 1.Qxf5?
      • 1...Sg1
        • 2.Qxf6#
      • 1...Sc1
        • 2.Qxf6#
      • 1...Sc3
        • 2.Qc5#
        • 2.Qxf6#
      • 1...Sg3
        • 2.Qxf6#
      • 1...Kc3!
  • Keys
    • 1.Sc5!
      • 1...Ke5
        • 2.Qc3#
      • 1...Sg1
        • 2.Se6#
      • 1...Sc1
        • 2.Se6#
      • 1...Sc3
        • 2.Se6#
      • 1...Sg3
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,P-FLIGHT,P_SPINS(a)::QAB1(G)
    • S(a);SBLOCK::QAB1(G)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINS(a)::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINS(a)::QAB1(G)
        • S(a);::S(D)
      • Refutation
        • P(f);XS(D)
    • Try
      • B(F);
      • Vars
        • S(a);::QAB1(G)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(a)
    • Try
      • Q(G);
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINS(a)::QAR1(G),XP(d)
        • S(a);N_GUARD::QAB(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINS(a)::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);XP(e)
      • Vars
        • S(a);::QAB(G),XP(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(c);N_GUARD,P_SPINS(a),S_FLIGHT::QAB(G)
      • S(a);::S(D)
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