MESON Chess Problem Database

Problem Display
PID: 174094 (1K2b3/BN3Rq1/5r1b/1pR3rP/4k3/3N1pn1/BP3Q2/8 w - - 0 1)

Zarur, Almiro Elias

1st HM., Berlingozzo-Coutinho Festival, 1985

1K2b3/BN3Rq1/5r1b/1pR3rP/4k3/3N1pn1/BP3Q2/8

#2

10 + 9

1077 Boletim da UBP 1986

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Bb1#
  • Tries
    • 1.Sd6+?
      • 1...Kxd3
        • 2.Bb1#
        • 2.Rc3#
      • 1...Rxd6!
    • 1.Bd5+?
      • 1...Kxd3
        • 2.Rc3#
      • 1...Kf5
        • 2.Qxf3#
      • 1...Rxd5!
    • 1.Re5+?
      • 1...Kxd3
        • 2.Sc5#
        • 2.Re3#
      • 1...Rxe5!
    • 1.Qe1+?
      • 1...Kxd3
        • 2.Rc3#
      • 1...Kd4
        • 2.Rd5#
      • 1...Se2!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qxf3#
      • 1...Kxd3
        • 2.Sc5#
      • 1...Kxf5
        • 2.Qxf3#
      • 1...Rgxf5
        • 2.Qd4#
      • 1...Rfxf5
        • 2.Qe3#
      • 1...Sxf5
        • 2.Sbc5#
      • 1...Rb6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,S_FLIGHT,XS(D)::B(A)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • R(f);XS(H)
    • Try
      • B(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::R1(E)
        • K(c);P_SPINP(a),P_SPINR(f),S_FLIGHT::QAR2(C),XP(a)
      • Refutation
        • R(e);XB(A)
    • Try
      • R(E);CHECK
      • Refutation
        • R(e);XR(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::R1(E)
        • K(c);P-FLIGHT::B(G)+R(E),DCHECK
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(E);
    • Threat
      • QAB1(C),XP(a)
    • Vars
      • K(c);S_FLIGHT,XS(D)::S(H)
      • K(c);P_SPINP(a),P_SPINR(f),S_FLIGHT,XR(E)::QAR2(C),XP(a)
      • R(e);SBLOCK,XR(E)::QAR1(C)
      • R(f);XR(E)::QAR1(C)
      • S(b);SBLOCK,XR(E)::S(H)
      • R(f);P_PINS(H)::S(D)
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