MESON Chess Problem Database

Problem Display
PID: 111169 (1K1N4/4p3/4B1n1/3pk1B1/4N3/8/5P2/2Q5 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Shedey, Sergey Oleksandrovich

Sutaz Druzstiev CCCP, 1976

1K1N4/4p3/4B1n1/3pk1B1/4N3/8/5P2/2Q5

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qe3#
    • 1...dxe4
      • 2.Qc5#
  • Tries
    • 1.Sg3?
      • 1...Kd6
        • 2.Qc7#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qf4#
      • 1...Sf8
        • 2.Qf4#
      • 1...Sh8
        • 2.Qf4#
      • 1...d4
        • 2.Qc5#
        • 2.Qc7#
      • 1...Kd4!
    • 1.Sc5?
      • 1...Kd4
        • 2.Sc6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qf4#
      • 1...Sf8
        • 2.Qf4#
      • 1...Sh8
        • 2.Qf4#
      • 1...d4
        • 2.Sf7#
      • 1...Kd6!
    • 1.Sc6+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kxe6!
    • 1.Bf6+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...exf6!
    • 1.Qe3?
      • 1...dxe4
        • 2.Qc5#
      • 1...Sf4
        • 2.Bxf4#
      • 1...Sh4
        • 2.Bf4#
        • 2.f4#
      • 1...Sf8
        • 2.Bf4#
        • 2.f4#
      • 1...Sh8
        • 2.Bf4#
        • 2.f4#
      • 1...d4!
    • 1.Qc3+?
      • 1...Kxe4
        • 2.Qe3#
        • 2.f3#
      • 1...d4!
    • 1.Qc5?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qxd5#
      • 1...Sf4!
    • 1.Qc6?
      • threat
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Qd5#
        • 2.Qc5#
      • 1...d4
        • 2.Sf7#
        • 2.Qd5#
      • 1...Sf4!
  • Keys
    • 1.Sd6!
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxd6
        • 2.Qc7#
      • 1...exd6
        • 2.Qe3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qf4#
      • 1...Sf8
        • 2.Qf4#
      • 1...Sh8
        • 2.Qf4#
      • 1...d4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,P-FLIGHT,XS(C)::QAR1(A)
    • P(a);OGATEB,SBLOCK,XS(C)::QAR2(A)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • S(c);N_GUARD::QAB1(A),XS(c)
        • S(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::S(G)
        • S(c);N_GUARD::QAB1(A),XS(c)
        • S(c);N_GUARD::QAB1(A)
        • P(a);SBLOCK::S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • P(d);XB(D)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB,P_SPINP(a),SBLOCK,XS(C)::QAR2(A)
        • S(c);N_GUARD::B(D),XS(c)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR1(A),XP(a)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a),XS(C)::QAB1(A),XP(a)
      • Refutation
        • S(c);
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • P(d);SBLOCK,XS(C)::QAR2(A)
      • S(c);N_GUARD::QAB1(A),XS(c)
      • S(c);N_GUARD::QAB1(A)
      • P(a);OGATEB::QAR2(A)
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