MESON Chess Problem Database

Problem Display
PID: 272815 (k1K5/p7/n1p5/B7/8/8/8/Q7 w - - 0 1)

Maksimovskikh, Aleksandr

Shakhmatnaya kompozitsiya, 1998

k1K5/p7/n1p5/B7/8/8/8/Q7

#2

3 + 4

5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qh1#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb7#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Qe5?
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...c5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sc7!
    • 1.Qh8?
      • 1...Sc5
        • 2.Kc7#
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qh1#
      • 1...Sb8!
    • 1.Qb1?
      • threat
        • 2.Qb7#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
  • Keys
    • 1.Bb6!
      • 1...axb6
        • 2.Qxa6#
      • 1...Sc5
        • 2.Qxa7#
      • 1...Sb4
        • 2.Qxa7#
      • 1...Sc7
        • 2.Qxa7#
      • 1...Sb8
        • 2.Qxa7#
      • 1...c5
        • 2.Qh1#

Anticipated by 81260(1992)

This anticipates 24707(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • S(a);::QAR(A)+K(C)
        • S(a);::QAR(A)+K(C),XS(a)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • S(a);
  • Actual
    • B(B);
    • Vars
      • P(c);OGATEB,P_SPINS(a),XB(B)::QAR2(A),XS(a)
      • S(a);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • P(b);OGATEB::QAB(A)
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