MESON Chess Problem Database

Problem Display
PID: 272037 (7K/6R1/8/2N5/p7/p3p3/1k2N3/b3Q3 w - - 0 1)

Kovalenko, V?

Shakhmatnaya kompozitsiya, 1998

7K/6R1/8/2N5/p7/p3p3/1k2N3/b3Q3

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qc1#
    • 1...a2
      • 2.Qc1#
  • Tries
    • 1.Kh7?
      • 1...Kc2
        • 2.Qc1#
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
    • 1.Kg8?
      • 1...Kc2
        • 2.Qc1#
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
    • 1.Rg1?
      • threat
        • 2.Qb1#
      • 1...Ka2+
        • 2.Qxa1#
      • 1...a2
        • 2.Qc3#
        • 2.Qc1#
      • 1...Kc2+!
    • 1.Qb4+?
      • 1...Ka2
        • 2.Sc1#
      • 1...Kc2!
    • 1.Qxa1+?
      • 1...Kc2
        • 2.Qc1#
      • 1...Kxa1!
    • 1.Qd1?
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
    • 1.Qf1?
      • 1...Kc2
        • 2.Qc1#
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
    • 1.Qg1?
      • 1...Kc2
        • 2.Qc1#
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
    • 1.Qh1?
      • 1...Kc2
        • 2.Qc1#
      • 1...a2
        • 2.Qc1#
      • 1...Ka2!
  • Keys
    • 1.Rg2!
      • 1...Ka2+
        • 2.Sc3#
      • 1...Kc2+
        • 2.Sd4#
      • 1...a2
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,P-FLIGHT,P_PINR(D)::QAR1(A)
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);CHECK,N_GUARD,P-FLIGHT::QAR1(A),XB(a)
      • Refutation
        • K(b);CHECK,P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_PINR(D)::S(B)
      • Refutation
        • K(b);P-FLIGHT,P_PINR(D)
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,P_PINR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_PINR(D)::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,P_PINR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_PINR(D)::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,P_PINR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_PINR(D)::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,P_PINR(D)
  • Actual
    • R(D);
    • Vars
      • K(b);CHECK,P-FLIGHT::R(D)+S(B),DCHECK
      • P(c);SBLOCK::QAB1(A)
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