MESON Chess Problem Database

Problem Display
PID: 28650 (b1B1R3/1Q2N3/3p4/1n1qb1BK/3Pkp1R/1n6/4PP2/1N6 w - - 0 1)

Petite, Efren

The Problemist, 2001

b1B1R3/1Q2N3/3p4/1n1qb1BK/3Pkp1R/1n6/4PP2/1N6

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Rxf4#
    • 1...Bg7
      • 2.Rxf4#
    • 1...Bh8
      • 2.Rxf4#
    • 1...S3xd4
      • 2.Sd2#
    • 1...S5xd4
      • 2.Sc3#
  • Keys
    • 1.Bxf4!
      • threat
        • 2.Bxe5#
      • 1...Bxd4+
        • 2.Bf5#
      • 1...Bxf4+
        • 2.Sf5#
      • 1...Bf6+
        • 2.Bg5#
      • 1...Bg7+
        • 2.Be5#
        • 2.Bg5#
      • 1...Bh8+
        • 2.Be5#
        • 2.Bg5#
      • 1...Kxd4
        • 2.Be3#
      • 1...S3xd4
        • 2.Sd2#
      • 1...S5xd4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(f);N_GUARD,P_PINB(F)::R1(E),XP(c)
    • S(a);N_GUARD,SBLOCK,XP(D)::S(A)
    • S(d);N_GUARD,SBLOCK,XP(D)::S(A)
  • Actual
    • B(F);XP(c)
    • Threat
      • R(E)+B(F),XB(f)
    • Vars
      • B(f);CHECK,SBLOCK,XP(D)::B(J)
      • B(f);CHECK,P_SPINB(f),XB(F)::R(K)+S(I)
      • B(f);CHECK,N_GUARD::R(E)+B(F)
      • K(b);N_SPINQ(e),P-FLIGHT,XP(D)::R(E)+B(F),DCHECK
      • S(a);N_GUARD,SBLOCK,XP(D)::S(A)
      • S(d);N_GUARD,SBLOCK,XP(D)::S(A)
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