MESON Chess Problem Database

Problem Display
PID: 69836 (3BK3/1Q1pN3/N1r1k1n1/2P1pR1B/R4P2/7P/8/3r3q w - - 0 1)

Navon, Emanuel

1st HM., Belgrade Internet Ty., 2005

3BK3/1Q1pN3/N1r1k1n1/2P1pR1B/R4P2/7P/8/3r3q

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxd7#
    • 1...Rb1
      • 2.Qxd7#
    • 1...Rc1
      • 2.Qxd7#
    • 1...Re1
      • 2.Qxd7#
    • 1...Rf1
      • 2.Qxd7#
    • 1...Rg1
      • 2.Qxd7#
    • 1...Rb6
      • 2.Sc7#
    • 1...Rd6
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Sxf4
      • 2.Bf7#
    • 1...Sh4
      • 2.Bf7#
    • 1...Sf8
      • 2.Bf7#
    • 1...d5
      • 2.Qxc6#
      • 2.Qd7#
    • 1...d6
      • 2.Qd7#
  • Tries
    • 1.Qxc6+?
      • 1...Rd6
        • 2.Sc7#
        • 2.Qxd6#
      • 1...dxc6
        • 2.Sc7#
      • 1...d6
        • 2.Sc7#
        • 2.Qd7#
        • 2.Qc8#
      • 1...Qxc6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qxd7#
      • 1...Kxd5
        • 2.Qb3#
      • 1...Kxf5
        • 2.Bg4#
      • 1...Qxd5
        • 2.Rf6#
      • 1...Rxd5
        • 2.Rf6#
      • 1...Rd6
        • 2.Rf6#
      • 1...Rc7
        • 2.Rf6#
      • 1...Sf8
        • 2.Rxe5#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::QAB1(H),XP(g)
    • R(d);N_GUARD::S(G)
    • R(d);N_GUARD::S(G),XR(d)
    • S(f);OGATE,XP(C)::B(F)
    • S(f);OGATE::B(F)
    • P(g);S_CUTR(a)::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK,XR(d)
      • Vars
        • P(g);XQ(H)::S(G)
      • Refutation
        • Q(b);XQ(H)
  • Actual
    • S(I);
    • Threat
      • QAB1(H),XP(g)
    • Vars
      • K(e);OGATEB,P_SPINP(c),P_SPINR(d),S_FLIGHT,XS(I)::QAB(H)
      • K(e);OGATEB,S_FLIGHT,XR(E)::B(F)
      • Q(b);SBLOCK,XS(I)::R1(E)
      • R(a);SBLOCK,XS(I)::R1(E)
      • R(d);::R1(E)
      • S(f);N_GUARD::R1(E),XP(c)
      • P(g);OGATE::QAB1(H)
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