MESON Chess Problem Database

Problem Display
PID: 57453 (8/R2n4/8/BkpQ4/8/8/1K6/8 w - - 0 1)

Servais, Albert

Het Belgisch Schaakbord (L'Echiquier Belge), 1953

8/R2n4/8/BkpQ4/8/8/1K6/8

#2

4 + 3

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qb3#
      • 2.Qc4#
      • 2.Qc6#
      • 2.Qxd7#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qxd7#
      • 1...Se5
        • 2.Qb7#
      • 1...Sf6
        • 2.Qb7#
      • 1...Sb8
        • 2.Qb7#
      • 1...Sf8
        • 2.Qb7#
      • 1...Sb6!
    • 1.Bb6?
      • 1...Kb4
        • 2.Qb3#
      • 1...Kxb6
        • 2.Qb7#
      • 1...Se5
        • 2.Qxc5#
      • 1...Sf6
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qxc5#
      • 1...Sf8
        • 2.Qxc5#
      • 1...Sxb6!
    • 1.Qd3+?
      • 1...Ka4
        • 2.Be1#
        • 2.Bd2#
        • 2.Bc3#
        • 2.Qc4#
        • 2.Qb3#
        • 2.Qxd7#
      • 1...Kc6
        • 2.Rc7#
        • 2.Qxd7#
      • 1...c4!
  • Keys
    • 1.Bb4!
      • 1...Kxb4
        • 2.Qb3#
      • 1...Kb6
        • 2.Qb7#
      • 1...Se5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qxc5#
      • 1...Sf6
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qxc5#
      • 1...Sf8
        • 2.Qxc5#

This anticipates 39347(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAB(C),XS(c)
      • Vars
        • S(c);N_GUARD::QAR2(C)
      • Refutation
        • S(c);
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(B)::QAR1(C)
        • S(c);N_GUARD::QAR1(C),XP(b)
      • Refutation
        • S(c);XB(B)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • B(B);
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(B)::QAR1(C)
      • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XP(b)
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