MESON Chess Problem Database

Problem Display
PID: 154164 (n6r/R2P4/KNk2PR1/p1bN4/3P4/rPPP1PB1/2Qp1pB1/4q3 w - - 0 1)

Navon, Emanuel

Variantim, 1988

n6r/R2P4/KNk2PR1/p1bN4/3P4/rPPP1PB1/2Qp1pB1/4q3

#2

15 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.d8S#
    • 1...Rh2
      • 2.d8S#
    • 1...Rh3
      • 2.d8S#
    • 1...Rh4
      • 2.d8S#
    • 1...Rh5
      • 2.d8S#
    • 1...Rh6
      • 2.d8S#
    • 1...Rh7
      • 2.d8S#
    • 1...Bb4
      • 2.cxb4#
    • 1...Bxd4
      • 2.cxd4#
    • 1...Bf8
      • 2.d8S#
    • 1...Sc7+
      • 2.Rxc7#
  • Tries
    • 1.Sb4+?
      • 1...Bxb4
        • 2.cxb4#
      • 1...axb4+!
    • 1.Se7+?
      • 1...Qxe7
        • 2.d5#
      • 1...Bxe7!
    • 1.f7+?
      • 1...Bd6
        • 2.Rxd6#
      • 1...Qe6!
  • Keys
    • 1.Se3!
      • threat
        • 2.d5#
      • 1...Sc7+
        • 2.Rxc7#
      • 1...Bxd4
        • 2.cxd4#
      • 1...Bxb6
        • 2.f7#
      • 1...Sxb6
        • 2.Rc7#
      • 1...Rh5
        • 2.d8S#
      • 1...Bb4
        • 2.cxb4#
      • 1...Bd6
        • 2.f4#
      • 1...Be7
        • 2.fxe7#
      • 1...Bf8
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(i);N_GUARD::P=S
    • B(f);OGATE::QAR(A)+P(D),XB(f)
    • B(f);OGATE,XP(H)::QAR(A)+P(D),XB(f)
    • B(f);S_CUTR(i)::P=S
    • S(h);CHECK,N_GUARD::R1(N),XS(h)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • B(f);OGATE,XS(I)::QAR(A)+P(D),XB(f)
      • Refutation
        • P(e);CHECK,XS(I)
    • Try
      • S(I);CHECK
      • Vars
        • Q(a);XS(I)::P(H)
      • Refutation
        • B(f);XS(I)
    • Try
      • P(L);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::R1(M),XB(f)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(I);
    • Threat
      • P(H)
    • Vars
      • S(h);CHECK,N_GUARD::R1(N),XS(h)
      • B(f);OGATE,XP(H)::QAR(A)+P(D),XB(f)
      • B(f);N_GUARD,XS(K)::R(M)+P(L)
      • S(h);N_GUARD,XS(K)::R1(N)
      • R(i);N_GUARD::P=S
      • B(f);OGATE::QAR(A)+P(D),XB(f)
      • B(f);SBLOCK::B(B)+P(F)
      • B(f);OGATE::R(M)+P(L),XB(f)
      • B(f);S_CUTR(i)::P=S
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