MESON Chess Problem Database

Problem Display
PID: 86159 (B6B/1Np2K2/1p6/3k2p1/1p2Np2/1P2p3/2qnQ3/8 w - - 0 1)

Vladimirov, Viacheslav Semenovich

Uralski Problemist, 2001

B6B/1Np2K2/1p6/3k2p1/1p2Np2/1P2p3/2qnQ3/8

#2

7 + 9

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Sd6#
    • 1...Kc6
      • 2.Sbc5#
    • 1...Qc6
      • 2.Qd3#
    • 1...c5
      • 2.Sa5#
      • 2.Sbxc5#
      • 2.Sbd6#
      • 2.Sd8#
  • Tries
    • 1.Sa5+?
      • 1...Qc6
        • 2.Bxc6#
        • 2.Qd3#
      • 1...c6!
    • 1.Sbd6+?
      • 1...Qc6
        • 2.Qd3#
        • 2.Qb5#
      • 1...c6!
    • 1.Sd8+?
      • 1...Qc6
        • 2.Bxc6#
        • 2.Qd3#
      • 1...c6!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Sa5#
        • 2.Sbc5#
        • 2.Sd8#
      • 1...Qxd3!
    • 1.Qb5+?
      • 1...Kxe4
        • 2.Sd6#
      • 1...c5
        • 2.Sa5#
        • 2.Sbxc5#
        • 2.Sbd6#
        • 2.Sd8#
      • 1...Qc5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe6#
      • 1...Kxe4
        • 2.Sc5#
      • 1...Kc6
        • 2.Sbd6#
      • 1...Qxe4
        • 2.Qd7#
      • 1...Qc6
        • 2.Qf5#

Anticipated by 97940(1953)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);P_SPINP(c),S_FLIGHT,XS(C)::B(F)+S(D),DCHECK
    • K(f);S_FLIGHT::B(F)+S(D)
    • Q(a);N_GUARD,SBLOCK::QAR2(A)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • S(D);CHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • S(D);CHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(A);CHECK
      • Refutation
        • Q(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(C)::B(F)+S(D),DCHECK
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(f);P_SPINP(e),S_FLIGHT,XS(C)::B(F)+S(D),DCHECK
      • K(f);S_FLIGHT::B(F)+S(D)
      • Q(a);SBLOCK,XS(C)::QAR2(A)
      • Q(a);SBLOCK::QAR2(A)
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Developed and maintained by Brian Stephenson.
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