MESON Chess Problem Database

Problem Display
PID: 174424 (4r2b/1P3pnB/KQ4q1/p5R1/N1N1k3/r1R5/2P1bPP1/2B1n3 w - - 0 1)

Navon, Emanuel

Comm., Israel Ring Ty., 1990

4r2b/1P3pnB/KQ4q1/p5R1/N1N1k3/r1R5/2P1bPP1/2B1n3

#2

12 + 10

721 Variantim 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh7
      • 2.Qe3#
    • 1...Rxc3
      • 2.Sxc3#
    • 1...Re5
      • 2.Rxe5#
    • 1...Ra8+
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rb8
      • 2.Re5#
    • 1...Rc8
      • 2.Re5#
    • 1...Rd8
      • 2.Re5#
    • 1...Rf8
      • 2.Re5#
    • 1...Rg8
      • 2.Re5#
    • 1...Bd1
      • 2.Sd6#
    • 1...Bf3
      • 2.Sd6#
    • 1...Bxc4+
      • 2.Rxc4#
    • 1...Bg4
      • 2.Sd6#
    • 1...Bh5
      • 2.Sd6#
    • 1...Sd3
      • 2.Sd6#
    • 1...Se6
      • 2.Qe3#
    • 1...f6
      • 2.Qe3#
  • Tries
    • 1.f3+?
      • 1...Bxf3
        • 2.Sd6#
      • 1...Sxf3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sc5#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...Rxa4
        • 2.Re3#
      • 1...Re5
        • 2.Rxe5#
      • 1...Rc8
        • 2.Re5#
      • 1...Sd3
        • 2.Sd2#
      • 1...Se6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(f);N_PINQ(J),N_SPINQ(f),XB(L)::QAR1(J)
    • R(c);XR(E)::S(F),XR(c)
    • R(i);N_GUARD::R1(H),XR(i)
    • R(i);CHECK,OGATE::PXR(i)=Q
    • R(i);N_GUARD::R1(H)
    • B(b);N_PINS(G)::S(G)
    • B(b);CHECK,OGATE,XS(G)::R(E),XB(b)
    • S(a);N_PINS(G)::S(G)
    • S(h);N_PINQ(J)::QAR1(J)
    • P(g);N_PINQ(J)::QAR1(J)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • B(b);N_PINS(G),XP(C)::S(G)
      • Refutation
        • S(a);XP(C)
  • Actual
    • Q(J);
    • Threat
      • S(F)
    • Vars
      • R(i);CHECK,OGATE::PXR(i)=Q
      • B(b);CHECK,OGATE,XS(G)::R(E),XB(b)
      • R(c);N_GUARD,XS(F)::R1(E)
      • R(i);N_GUARD::R1(H),XR(i)
      • R(i);N_GUARD::R1(H)
      • S(a);N_PINS(G)::S(G)
      • S(h);N_PINQ(J)::QAB1(J)
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