MESON Chess Problem Database

Problem Display
PID: 245178 (5B2/8/3R2K1/2ppkPpN/2Pn1pp1/1N1Pn1P1/6B1/7Q w - - 0 1)

Petite, Efren

Scacchi e Scienze Applicate, 1987

5B2/8/3R2K1/2ppkPpN/2Pn1pp1/1N1Pn1P1/6B1/7Q

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Rxd5#
    • 1...Sf1
      • 2.Rxd5#
    • 1...Sec2
      • 2.Rxd5#
    • 1...Sxg2
      • 2.Rxd5#
    • 1...Sxc4
      • 2.Rxd5#
    • 1...Sdc2
      • 2.Re6#
    • 1...Se2
      • 2.Re6#
    • 1...Sf3
      • 2.Re6#
    • 1...Sb5
      • 2.Re6#
    • 1...Sc6
      • 2.Re6#
    • 1...Se6
      • 2.Rxe6#
  • Tries
    • 1.Sxd4?
      • threat
        • 2.Sc6#
      • 1...cxd4
        • 2.Re6#
      • 1...Kxd4!
    • 1.Qe1?
      • threat
        • 2.Rxd5#
      • 1...dxc4
        • 2.Rd5#
      • 1...Se2
        • 2.Re6#
      • 1...Sxf5!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Qh8#
      • 1...Sexf5
        • 2.Rxd5#
      • 1...Sdxf5
        • 2.Re6#
      • 1...Se6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • S(a);N_GUARD::R1(I),XP(f)
    • S(a);N_GUARD,XB(B)::R1(I),XP(f)
    • S(a);N_GUARD,XP(F)::R1(I),XP(f)
    • S(b);N_GUARD::R1(I)
    • S(b);N_GUARD::R1(I),XS(b)
  • Tries
    • Try
      • S(C);XS(b)
      • Threat
        • S(C)
      • Vars
        • P(e);SBLOCK,XS(C)::R1(I)
      • Refutation
        • K(g);P_SPINP(f),S_FLIGHT,XS(C)
    • Try
      • Q(A);P_PINS(a)
      • Threat
        • R1(I),XP(f)
      • Vars
        • P(f);XP(F)::R1(I)
        • S(b);N_GUARD,N_SPINS(a)::R1(I)
      • Refutation
        • S(b);XP(G)
  • Actual
    • S(H);XP(c)
    • Threat
      • QAB(A)
    • Vars
      • S(a);N_GUARD,XP(G)::R1(I),XP(f)
      • S(b);N_GUARD,XP(G)::R1(I)
      • S(b);N_GUARD::R1(I),XS(b)
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