MESON Chess Problem Database

Problem Display
PID: 271331 (1Bb1N3/3PR1bQ/1p2n3/1B1k1p2/N2P4/4p1n1/8/1KR5 w - - 0 1)

Onkoud, Abdelaziz

Buletin Problemistic, 1995

1Bb1N3/3PR1bQ/1p2n3/1B1k1p2/N2P4/4p1n1/8/1KR5

#2

10 + 8

6490 yacpdb 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Bc6#
    • 1...Sxd4
      • 2.Sxb6#
  • Tries
    • 1.Sf6+?
      • 1...Kxd4
        • 2.Rd1#
      • 1...Bxf6!
    • 1.Qxf5+?
      • 1...Kxd4
        • 2.Rd1#
        • 2.Rc4#
        • 2.Qd3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sxf5!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Bc6#
      • 1...Bxd4
        • 2.Sf6#
      • 1...Sxd4
        • 2.Qg8#
      • 1...Se2
        • 2.Qh1#
      • 1...Se4
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK,XP(D)::B(E)
    • S(f);SBLOCK,XP(D)::S(C),XP(e)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(c);P-FLIGHT,S_CUTB(g),XP(D)::R(B)
      • Refutation
        • B(g);XS(J)
    • Try
      • Q(H);CHECK,XP(d)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(H),XB(g)
      • Refutation
        • S(b);XQ(H)
  • Actual
    • R(B);
    • Threat
      • S(C)
    • Vars
      • K(c);N_GUARD,P_SPINP(d),P_SPINS(f),S_FLIGHT::B(E)
      • B(g);N_GUARD,P_SPINB(g),XP(D)::S(J)
      • S(f);OGATEB,P_SPINS(f),XP(D)::QAB(H)
      • S(b);N_GUARD::QAB(H)
      • S(b);SBLOCK::S(C),XP(e)
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