MESON Chess Problem Database

Problem Display
PID: 60537 (6B1/bK1N1N2/8/1p1R4/bp1P1p2/1k2r1rR/p7/B1Q5 w - - 0 1)

Petite, Efren

1st Prize, L'Italia Scacchistica, 1973

6B1/bK1N1N2/8/1p1R4/bp1P1p2/1k2r1rR/p7/B1Q5

#2

9 + 9

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bb8
      • 2.Sc5#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qb2#
      • 1...Re2
        • 2.Re5#
      • 1...Rg2
        • 2.Rg5#
      • 1...Bxd4!
    • 1.Qd1+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Ka3!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Bb2#
        • 2.Qb2#
      • 1...Kxc2!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qb2#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Re2
        • 2.Sfe5#
      • 1...Rg2
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(i);N_GUARD::S(G),XB(i)
    • B(i);N_GUARD::S(G)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(B)
      • Vars
        • R(c);P_SPINR(d)::B(I)+R(E)
        • R(d);P_SPINR(c)::B(I)+R(E)
      • Refutation
        • B(i);XP(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::S(H)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • R(E);
    • Threat
      • QAR1(B)
    • Vars
      • B(i);XR(E)::S(G),XB(i)
      • R(c);P_SPINR(d)::B(I)+S(H)
      • R(d);P_SPINR(c)::B(I)+S(H)
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