MESON Chess Problem Database

Problem Display
PID: 147011 (7Q/2Np2p1/4pb2/2p5/1Pbk1PR1/4p1B1/1KPN1r2/8 w - - 0 1)

Onkoud, Abdelaziz

Australian Chess Problem Magazine, 1994

7Q/2Np2p1/4pb2/2p5/1Pbk1PR1/4p1B1/1KPN1r2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.f5#
    • 1...Re2
      • 2.f5#
    • 1...Rg2
      • 2.f5#
    • 1...Rh2
      • 2.f5#
    • 1...Bd3
      • 2.c3#
    • 1...Bd5
      • 2.Sb5#
    • 1...e2
      • 2.Bxf2#
    • 1...d5
      • 2.Sxe6#
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qe4#
      • 1...Rxd2
        • 2.f5#
      • 1...Rxf4
        • 2.Sf3#
      • 1...exd2
        • 2.Bxf2#
      • 1...cxb4
        • 2.Qa7#
      • 1...Bd3
        • 2.c3#
      • 1...Bd5
        • 2.Sb5#
      • 1...d5
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,P_PINP(B),XS(C)::R(G)+P(F)
    • R(a);N_GUARD::R(G)+P(F)
    • B(c);SBLOCK::P(B)
    • B(c);N_GUARD,SBLOCK::S(H)
    • P(b);OGATEB::B(D),XR(a)
    • P(h);N_GUARD,SBLOCK,S_CUTB(c)::S(H),XP(f)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(a);N_GUARD,P_PINP(B),XS(C)::R(G)+P(F)
      • R(a);N_GUARD,P_SPINR(a),XP(F)::S(C)
      • P(b);OGATEB,XS(C)::B(D),XR(a)
      • P(e);OGATEB,XP(E)::QAB(I)
      • B(c);SBLOCK::P(B)
      • B(c);N_GUARD::S(H)
      • P(h);N_GUARD,S_CUTB(c)::S(H),XP(f)
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