MESON Chess Problem Database

Problem Display
PID: 138172 (k7/ppK1p3/4p3/4Q2b/8/8/8/2n2r2 w - - 0 1)

Nesic, Milivoj S

Vesti, 1965

k7/ppK1p3/4p3/4Q2b/8/8/8/2n2r2

#2

2 + 8

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qh8#
    • 1...a5
      • 2.Qxa5#
    • 1...b5
      • 2.Qe4#
    • 1...b6
      • 2.Qe4#
  • Tries
    • 1.Qh8+?
      • 1...Be8
        • 2.Qxe8#
      • 1...Rf8!
    • 1.Qd5?
      • threat
        • 2.Qxb7#
        • 2.Qd8#
      • 1...a5
        • 2.Qxb7#
        • 2.Qxa5#
      • 1...a6
        • 2.Qxb7#
      • 1...Rd1
        • 2.Qxb7#
      • 1...Rf8
        • 2.Qxb7#
      • 1...Bf3
        • 2.Qd8#
      • 1...exd5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxb7#
      • 1...Bf3
        • 2.Qe8#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD,S_CUTR(b)::QAB1(A)
    • P(e);OGATEB::QAR(A),XP(e)
    • P(f);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR(A),XB(c)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);P_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);::QAB1(A),XP(f)
        • R(b);::QAB1(A),XP(f)
        • B(c);::QAR(A)
      • Refutation
        • P(d);N_SPINP(f),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • B(c);N_GUARD::QAR(A)
      • P(f);OGATEB::QAB(A)
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