MESON Chess Problem Database

Problem Display
PID: 69021 (5B2/Np6/2p2K2/3kPp2/p4p2/2P2R2/1n2QNB1/1q1b4 w - - 0 1)

Courrard, V

Sp. HM., Het Belgisch Schaakbord (L'Echiquier Belge), 1955-1956

5B2/Np6/2p2K2/3kPp2/p4p2/2P2R2/1n2QNB1/1q1b4

#2

9 + 9

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rxf4#
    • 1...Qa1
      • 2.Rxf4#
    • 1...Qc1
      • 2.Rxf4#
    • 1...Sd3
      • 2.Rxf4#
    • 1...Sc4
      • 2.Rd3#
  • Tries
    • 1.Qc4+?
      • 1...Sxc4
        • 2.Rd3#
      • 1...Kxc4!
    • 1.Qb5+?
      • 1...c5
        • 2.Rd3#
        • 2.Qxc5#
      • 1...cxb5!
    • 1.c4+?
      • 1...Sxc4
        • 2.Rd3#
      • 1...Kd4!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Sb6#
      • 1...Sd3
        • 2.Rxf4#
      • 1...c5
        • 2.Se7#
      • 1...Sc4
        • 2.Rd3#
      • 1...b6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::B(C)+R(E),XP(e)
    • S(c);S_CUTQ(a)::B(C)+R(E),XP(e)
    • S(c);SBLOCK::B(C)+R(E),DCHECK
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);SBLOCK,XQ(A)::B(C)+R(E),DCHECK
      • Refutation
        • K(f);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(h);XQ(A)
    • Try
      • P(D);CHECK
      • Vars
        • S(c);SBLOCK,XP(D)::B(C)+R(E),DCHECK
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(c);S_CUTQ(a)::B(C)+R(E),XP(e)
      • P(h);SBLOCK::S(H)
      • S(c);SBLOCK::B(C)+R(E),DCHECK
      • P(i);::S(H),XP(i)
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