MESON Chess Problem Database

Problem Display
PID: 157294 (1qr3n1/4p3/Qb2N3/3p1RK1/2n1kp2/5R1N/1p4P1/8 w - - 0 1)

Petite, Efren

Probleemblad, 1953

1qr3n1/4p3/Qb2N3/3p1RK1/2n1kp2/5R1N/1p4P1/8

#2

7 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sf2#
    • 1...Bf2
      • 2.Sxf2#
    • 1...Ba5
      • 2.Sf2#
    • 1...Bc7
      • 2.Sf2#
    • 1...Bd8
      • 2.Sf2#
    • 1...Sd2
      • 2.Qd3#
    • 1...Sa3
      • 2.Qd3#
    • 1...Se3
      • 2.Sf2#
    • 1...Sa5
      • 2.Qd3#
    • 1...Se5
      • 2.R5xf4#
    • 1...Sd6
      • 2.Qd3#
    • 1...d4
      • 2.Sf2#
  • Tries
    • 1.Qxb6?
      • threat
        • 2.Sf2#
        • 2.Qd4#
      • 1...Sxb6
        • 2.Sf2#
      • 1...Qe5
        • 2.Sf2#
      • 1...Qa7
        • 2.Sf2#
      • 1...Rc5
        • 2.Sf2#
      • 1...d4
        • 2.Sf2#
        • 2.Qxd4#
      • 1...Qxb6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qb1#
      • 1...Se3
        • 2.Sf2#
      • 1...b1Q
        • 2.Qxb1#
      • 1...b1S
        • 2.Qxb1#
        • 2.Qc2#
      • 1...b1B
        • 2.Qxb1#
      • 1...b1R
        • 2.Qxb1#
        • 2.Qc2#
      • 1...Sd2
        • 2.Qxd5#
      • 1...Sa3
        • 2.Qxd5#
      • 1...Sa5
        • 2.Qxd5#
      • 1...Se5
        • 2.R5xf4#
      • 1...Sd6
        • 2.Qxd5#
      • 1...d4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(i);S_CUTB(f)::S(C)
    • B(f);N_GUARD::S(C),XB(f)
    • B(f);N_GUARD::S(C)
    • S(b);OGATE::QAB1(F)
    • S(b);S_CUTB(f)::S(C)
    • S(b);SBLOCK,S_CUTQ(h)::R1(D),XP(d)
    • P(e);S_CUTB(f)::S(C)
  • Tries
    • Try
      • Q(F);XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XQ(F)::S(C)
        • Q(h);P_PINR(D)::S(C)
        • Q(h);::S(C)
        • R(i);::S(C)
      • Refutation
        • Q(h);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • S(b);S_CUTB(f)::S(C)
      • P(a);::QAB(F),XQ(a)
      • P(a);::QAB(F),XB(a)
      • S(b);OGATE::QAB1(F),XP(e)
      • S(b);SBLOCK,S_CUTQ(h)::R1(D),XP(d)
      • P(e);S_CUTB(f)::S(C)
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