MESON Chess Problem Database

Problem Display
PID: 153333 (8/4K3/2N3P1/1QPkP1PR/1Pp1nR2/1P2ppp1/8/2rr1Nb1 w - - 0 1)

Onkoud, Abdelaziz

1st Prize, Springaren, 2008

8/4K3/2N3P1/1QPkP1PR/1Pp1nR2/1P2ppp1/8/2rr1Nb1

#2

12 + 9

145 StrateGems 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.bxc4#
    • 1...Rb1
      • 2.bxc4#
    • 1...Bh2
      • 2.Sxe3#
    • 1...Sd2
      • 2.Rd4#
    • 1...Sf2
      • 2.Sxe3#
    • 1...Sc3
      • 2.bxc4#
    • 1...Sxc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.cxd6#
    • 1...f2
      • 2.Sxe3#
  • Keys
    • 1.e6!
      • threat
        • 2.Rf5#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sxg5
        • 2.Rxg5#
      • 1...Sd2
        • 2.Rd4#
      • 1...Sf2
        • 2.Sxe3#
      • 1...Sc3
        • 2.bxc4#
      • 1...Sd6
        • 2.cxd6#
      • 1...Sf6
        • 2.gxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::P(B),XP(g)
    • B(c);N_GUARD::S(A),XP(d)
    • S(h);OGATE::R1(D)
    • S(h);S_CUTB(c)::S(A),XP(d)
    • S(h);S_CUTR(a)::P(B),XP(g)
    • S(h);OGATE,P_SPINS(h),XP(F)::QAR1(E),XS(h)
    • S(h);OGATE::QAR(E)+P(F),XS(h)
    • P(e);S_CUTB(c)::S(A),XP(d)
  • Actual
    • P(G);
    • Threat
      • R(D)
    • Vars
      • S(h);OGATE,P_SPINS(h),XP(F)::QAR1(E),XS(h)
      • S(h);OGATE,P_SPINS(h),XP(H)::R(I),XS(h)
      • S(h);OGATE::R1(D)
      • S(h);S_CUTB(c)::S(A),XP(d)
      • S(h);S_CUTR(a)::P(B),XP(g)
      • S(h);OGATE::QAR(E)+P(F),XS(h)
      • S(h);OGATE::R(I)+P(H),XS(h)
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