MESON Chess Problem Database

Problem Display
PID: 67945 (8/3p2N1/1Kprp2R/2pbk2N/2prP1R1/3p2p1/5P2/1Q4B1 w - - 0 1)

Onkoud, Abdelaziz

Phenix, 1999

8/3p2N1/1Kprp2R/2pbk2N/2prP1R1/3p2p1/5P2/1Q4B1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Rg5#
      • 2.f4#
    • 1...gxf2
      • 2.Bh2#
    • 1...g2
      • 2.Bh2#
  • Tries
    • 1.Kxc5?
      • 1...Rxe4
        • 2.Rg5#
      • 1...Bxe4
        • 2.f4#
      • 1...gxf2
        • 2.Bh2#
      • 1...d2
        • 2.Rg5#
        • 2.f4#
      • 1...g2
        • 2.Bh2#
      • 1...c3!
    • 1.Sf6?
      • threat
        • 2.f4#
      • 1...gxf2
        • 2.Bh2#
      • 1...Rxe4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Rg5#
        • 2.f4#
      • 1...Rxe4
        • 2.f4#
      • 1...Bxe4
        • 2.Rg5#
      • 1...gxf2
        • 2.Bh2#
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(b);OGATEB,XP(C)::B(B)
    • P(b);OGATEB::B(B)
  • Tries
    • Try
      • K(G);S_FLIGHT,XP(e)
      • Vars
        • R(d);SBLOCK,XP(D)::R(E)
        • B(f);SBLOCK,XP(D)::P(C)
        • P(b);OGATEB,XP(C)::B(B)
        • P(b);OGATEB::B(B)
      • Refutation
        • P(c);
    • Try
      • S(F);
      • Threat
        • P(C)
      • Vars
        • P(b);OGATEB,XP(C)::B(B)
      • Refutation
        • R(d);XP(D)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(d);P_SPINR(d),XP(D)::P(C)
      • B(f);P_SPINB(f),XP(D)::R(E)
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