MESON Chess Problem Database

Problem Display
PID: 174095 (2BRQB2/4pP2/1p4nK/1p2k3/5Rrp/b2n1rpq/3N1p2/7b w - - 0 1)

Zarur, Almiro Elias

2nd HM., Berlingozzo-Coutinho Festival, 1985

2BRQB2/4pP2/1p4nK/1p2k3/5Rrp/b2n1rpq/3N1p2/7b

#2

8 + 14

1077 Boletim da UBP 1986
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rf5#
    • 1...Sdxf4
      • 2.Bg7#
  • Tries
    • 1.Sc4+?
      • 1...Kxf4
        • 2.Rd4#
      • 1...bxc4!
    • 1.Re4+?
      • 1...Kf6
        • 2.Bg7#
      • 1...Rxe4!
    • 1.Qd7?
      • threat
        • 2.Qf5#
        • 2.Qd4#
      • 1...Kxf4
        • 2.Qd4#
      • 1...Rfxf4
        • 2.Qe6#
      • 1...Bd6
        • 2.Qf5#
      • 1...Rg5
        • 2.Qd4#
      • 1...Bb2
        • 2.Qf5#
        • 2.Qc7#
      • 1...Bc5
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#
      • 1...Rgxf4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe4#
      • 1...Kxf4
        • 2.Qe4#
      • 1...Rfxf4
        • 2.Qe6#
      • 1...Rgxf4
        • 2.Rd5#
      • 1...Sdxf4
        • 2.Bg7#
      • 1...Sgxf4
        • 2.Qc3#
      • 1...Re3
        • 2.Rf5#
      • 1...Sc5
        • 2.Qc7#

Anticipated by 17767(1949-1950)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD::R1(B)
    • S(d);SBLOCK,XR(B)::B(H)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(k);N_SPINP(n),S_FLIGHT,XR(B)::R(F)
      • Refutation
        • P(j);XS(A)
    • Try
      • R(B);CHECK
      • Vars
        • K(k);N_SPINP(n),S_FLIGHT::B(H)
      • Refutation
        • R(h);XR(B)
    • Try
      • Q(G);N_PINP(n)
      • Threat
        • DUALS(2)
      • Vars
        • K(k);S_FLIGHT,XR(B)::QAR2(G)
        • R(e);SBLOCK,XR(B)::QAR1(G)
        • B(c);::QAR1(G)
        • R(h);::QAB1(G)
        • P(n);::QAB1(G)
      • Refutation
        • R(h);XR(B)
  • Actual
    • Q(G);N_PINP(n)
    • Threat
      • QAR1(G)
    • Vars
      • K(k);S_FLIGHT,XR(B)::QAR1(G)
      • R(e);SBLOCK,XR(B)::QAR1(G)
      • R(h);SBLOCK,XR(B)::R1(F)
      • S(d);SBLOCK,XR(B)::B(H)
      • S(m);SBLOCK,XR(B)::QAB(G)
      • R(e);N_GUARD::R1(B)
      • S(d);S_CUTB(c)::QAB(G)
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