MESON Chess Problem Database

Problem Display
PID: 66783 (1N6/8/qp6/1k6/1p1K4/p7/N7/2Q2b2 w - - 0 1)

Gorbatenko, Yuri Grigorevich

Hlas l'udu, 1973

1N6/8/qp6/1k6/1p1K4/p7/N7/2Q2b2

#2

4 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qg5#
    • 1...Qa5
      • 2.Qc6#
  • Tries
    • 1.Sc3+?
      • 1...Ka5
        • 2.Sc6#
      • 1...bxc3!
    • 1.Qd2?
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...Qa4
        • 2.Qg5#
      • 1...b3
        • 2.Qb4#
      • 1...Qa5!
    • 1.Qb1?
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...Qa4
        • 2.Qf5#
      • 1...Qa5
        • 2.Sc3#
      • 1...b3!
    • 1.Qxf1+?
      • 1...Ka5
        • 2.Qxa6#
      • 1...Ka4!
    • 1.Qc4+?
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...Bxc4!
    • 1.Qc5+?
      • 1...Ka4
        • 2.Qxb4#
      • 1...bxc5+!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...Qa4
        • 2.Qe5#
      • 1...Qa5
        • 2.Qe8#
      • 1...b3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);SBLOCK::QAR(A)
    • Q(e);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT::S(D)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(d);S_FLIGHT::QAR1(A),XP(c)
        • K(d);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
        • Q(e);SBLOCK::QAR(A)
        • P(c);::QAR1(A)
      • Refutation
        • Q(e);
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
        • K(d);N_SPINP(c),P-FLIGHT::QAB1(A),XP(c)
        • Q(e);SBLOCK::QAR(A)
        • Q(e);SBLOCK::S(B)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • K(d);OGATE,P-FLIGHT::QAR1(A),XQ(e)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
        • K(d);P-FLIGHT::QAB1(A),XP(c)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • P(f);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(d);S_FLIGHT::QAR1(A),XP(c)
      • K(d);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
      • Q(e);SBLOCK::QAR(A)
      • Q(e);SBLOCK::QAB(A)
      • P(c);::QAR1(A)
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