MESON Chess Problem Database

Problem Display
PID: 171338 (8/1p6/1kN5/1N6/1K6/8/Q7/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1995

8/1p6/1kN5/1N6/1K6/8/Q7/8

#2

4 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qe6#
    • 1...bxc6
      • 2.Qa7#
  • Tries
    • 1.Kc4?
      • 1...bxc6
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qe6?
      • threat
        • 2.Scd4#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sca7#
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...Ka6
        • 2.Sb8#
      • 1...bxc6!
    • 1.Qf7?
      • 1...Kxc6
        • 2.Qe6#
      • 1...bxc6
        • 2.Qa7#
      • 1...Ka6!
    • 1.Qa1?
      • 1...bxc6
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qf2+?
      • 1...Ka6
        • 2.Sc7#
        • 2.Sb8#
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qa3?
      • 1...bxc6
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qa4?
      • 1...bxc6
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qa8?
      • 1...bxc6
        • 2.Qa7#
      • 1...Kxc6!
  • Keys
    • 1.Sa5!
      • 1...Ka6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(A)
    • P(b);SBLOCK,XS(D)::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(7)
      • Vars
        • K(a);P-FLIGHT::QAR(A)+S(D),DCHECK
      • Refutation
        • P(b);P_SPINP(b),XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(A)
        • P(b);OGATE,SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT::QAR(A)+S(D)
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Developed and maintained by Brian Stephenson.
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