MESON Chess Problem Database

Problem Display
PID: 52324 (2R3bK/p5p1/p2P4/p2pp3/Pk6/R1b3Q1/n7/NNr1B3 w - - 0 1)

Navon, Emanuel

1/2 Prize, Petite JT, 1990-1991

2R3bK/p5p1/p2P4/p2pp3/Pk6/R1b3Q1/n7/NNr1B3

#2

9 + 11

721 Variantim 1993
4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb1
      • 2.Sc2#
    • 1...Rd1
      • 2.Sc2#
    • 1...Rxe1
      • 2.Sc2#
    • 1...Rc2
      • 2.Sxc2#
    • 1...Bxe1
      • 2.Qb3#
    • 1...Bd2
      • 2.Qb3#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qb2#
      • 1...Rxb1
        • 2.Sc2#
      • 1...Rxe1
        • 2.Sc2#
      • 1...Rc2
        • 2.Sxc2#
      • 1...d4
        • 2.Qb7#
      • 1...Bd2!
    • 1.Qxc3+?
      • 1...Rxc3
        • 2.Sc2#
      • 1...Sxc3!
    • 1.Qe3?
      • threat
        • 2.Qc5#
      • 1...Bxe1
        • 2.Qb3#
      • 1...Bd2
        • 2.Qb3#
      • 1...d4!
    • 1.Qxg7?
      • threat
        • 2.Qb7#
      • 1...Rxb1
        • 2.Sc2#
      • 1...e4
        • 2.Qd4#
      • 1...Bf7!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Qd4#
      • 1...Rxb1
        • 2.Sc2#
      • 1...Rxe1
        • 2.Sc2#
      • 1...Bxe1
        • 2.Qb2#
      • 1...Rd1
        • 2.Sc2#
      • 1...Bd2
        • 2.Qb2#
      • 1...d4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,XS(B)::S(A)
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD,N_SPINB(c),XB(C)::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • B(c);N_SPINB(c),OGATE,XB(C)::QAR1(E)
    • B(c);OGATE::QAR1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • R(a);N_GUARD,XS(B)::S(A)
        • R(a);N_GUARD,N_SPINB(c),XB(C)::S(A)
        • R(a);N_GUARD::S(A),XR(a)
        • P(f);OGATE::QAR(E)
      • Refutation
        • B(c);
    • Try
      • Q(E);CHECK,XB(c)
      • Vars
        • R(a);P_SPINR(a),XQ(E)::S(A)
      • Refutation
        • S(b);P_SPINS(b),XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • B(c);N_SPINB(c),OGATE,XB(C)::QAR1(E)
        • B(c);OGATE::QAR1(E)
      • Refutation
        • P(f);
    • Try
      • Q(E);XP(j)
      • Threat
        • QAR(E)
      • Vars
        • R(a);N_GUARD,XS(B)::S(A)
        • P(g);OGATE,P_PINQ(E)::QAR2(E)
      • Refutation
        • B(k);
  • Actual
    • Q(E);XP(g)
    • Threat
      • QAR2(E)
    • Vars
      • R(a);N_GUARD,XS(B)::S(A)
      • R(a);N_GUARD,N_SPINB(c),XB(C)::S(A)
      • B(c);N_SPINB(c),OGATE,XB(C)::QAR2(E)
      • R(a);N_GUARD::S(A)
      • B(c);OGATE::QAR2(E)
      • P(f);OGATE::QAB1(E)
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