MESON Chess Problem Database

Problem Display
PID: 50919 (1K4Qb/R2N1p2/1Rp1kp2/2B1N3/p7/1q1P2P1/B7/4r2r w - - 0 1)

Navon, Emanuel

1st Prize, Belliboni-Faria Festival, 1989

1K4Qb/R2N1p2/1Rp1kp2/2B1N3/p7/1q1P2P1/B7/4r2r

#2

10 + 9

1077 Boletim da UBP 1990
1077 Boletim da UBP 1991
721 Variantim 1991
4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxf7#
    • 1...Kf5
      • 2.Qg4#
    • 1...f5
      • 2.Qxf7#
  • Tries
    • 1.Sxf7?
      • threat
        • 2.Sh6#
      • 1...Kd5
        • 2.Sfe5#
      • 1...Kf5
        • 2.Sd6#
      • 1...Rh6
        • 2.Sxh6#
      • 1...Rh7!
    • 1.Bxb3+?
      • 1...Kf5
        • 2.Qg4#
      • 1...axb3!
    • 1.Qe8+?
      • 1...Kd5
        • 2.Qxf7#
      • 1...Kf5!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Sb4#
      • 1...Kf5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINP(e),P_SPINP(h),S_FLIGHT::QAB(J),XP(h)
    • K(f);N_SPINP(e),N_SPINQ(c),S_FLIGHT::QAB1(J)
    • P(g);::QAB1(J),XP(h)
  • Tries
    • Try
      • S(E);XP(h)
      • Threat
        • QAB(J)+S(E)
      • Vars
        • K(f);N_SPINP(e),S_FLIGHT::QAB(J)+S(E)
        • K(f);N_SPINP(e),N_SPINQ(c),S_FLIGHT::S(E)
        • R(b);::QAB(J)+S(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(A);CHECK,N_SPINR(F),XQ(c)
      • Vars
        • K(f);N_SPINP(e),S_FLIGHT::QAB1(J)
      • Refutation
        • P(d);XB(A)
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);N_SPINP(e),S_FLIGHT::QAB(J),XP(h)
      • Refutation
        • K(f);N_SPINP(e),N_SPINQ(c),S_FLIGHT
  • Actual
    • S(E);P_PINP(h),XP(e)
    • Threat
      • R(F)+S(E)
    • Vars
      • K(f);S_FLIGHT::S(E)
      • K(f);N_SPINP(h),N_SPINQ(c),S_FLIGHT::S(E)
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