MESON Chess Problem Database

Problem Display
PID: 1040 (8/8/4B3/5K2/8/p1Q5/rN6/1k6 w - - 0 1)

Kovalenko, Vitaly Semenovich

The Problemist Supplement, 1998

8/8/4B3/5K2/8/p1Q5/rN6/1k6

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ka1
      • 2.Qc1#
  • Tries
    • 1.Qd2?
      • 1...Ka1
        • 2.Qc1#
      • 1...Rxb2
        • 2.Qd1#
      • 1...axb2
        • 2.Qd1#
      • 1...Ra1!
    • 1.Qc2+?
      • 1...Ka1
        • 2.Qc1#
      • 1...Kxc2!
    • 1.Qb3?
      • 1...Ka1
        • 2.Qxa2#
      • 1...Rxb2
        • 2.Qd1#
      • 1...axb2
        • 2.Qd1#
      • 1...Ra1
        • 2.Sd3#
      • 1...Kc1!
  • Keys
    • 1.Bb3!
      • 1...Ka1
        • 2.Qc1#
      • 1...Rxb2
        • 2.Qe1#
      • 1...axb2
        • 2.Qe1#
      • 1...Ra1
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • R(b);SBLOCK,XS(A)::QAR2(B)
        • P(c);SBLOCK,XS(A)::QAR2(B)
      • Refutation
        • R(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XR(b)
        • R(b);P_SPINR(b),SBLOCK,XS(A)::QAR2(B)
        • P(c);P_SPINP(c),SBLOCK,XS(A)::QAR2(B)
        • R(b);N_GUARD,SBLOCK::QAR(B)+S(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • R(b);SBLOCK,XS(A)::QAR(B)
      • P(c);SBLOCK,XS(A)::QAR(B)
      • R(b);SBLOCK::QAB1(B)
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