MESON Chess Problem Database

Problem Display
PID: 224204 (qB6/2bQ4/8/N1pnN2R/2Pkn3/R2Pp3/2P1p2K/3b4 w - - 0 1)

Petite, Efren

Suomen Shakki, 1958

qB6/2bQ4/8/N1pnN2R/2Pkn3/R2Pp3/2P1p2K/3b4

#2

10 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qxa5
      • 2.Qxd5#
    • 1...Qa6
      • 2.Qxd5#
    • 1...Qa7
      • 2.Sc6#
      • 2.Qxd5#
    • 1...Qxb8
      • 2.Sc6#
      • 2.Qxd5#
    • 1...Bxa5
      • 2.Sf3#
    • 1...Bxe5+
      • 2.Bxe5#
    • 1...Bb6
      • 2.Sf3#
    • 1...Bd8
      • 2.Sf3#
    • 1...Sd2
      • 2.c3#
    • 1...Sf2
      • 2.c3#
    • 1...Sc3
      • 2.Sb3#
    • 1...Sg3
      • 2.Sf3#
      • 2.c3#
    • 1...Sd6
      • 2.Sf3#
    • 1...Sf6
      • 2.c3#
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxe4#
      • 1...Bxe5+
        • 2.Bxe5#
      • 1...Sc3
        • 2.Sb3#
      • 1...Sb4
        • 2.c3#
      • 1...Sf4
        • 2.Sf3#
      • 1...Sb6
        • 2.c3#
      • 1...Sf6
        • 2.c3#
      • 1...Se7
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 11
  • Sets
    • Q(i);N_GUARD::S(F),XQ(i)
    • Q(i);N_GUARD,XS(F)::QAR1(I),XS(g)
    • Q(i);N_GUARD::QAR1(I),XS(g)
    • B(h);N_PINS(G),XS(F)::S(G)
    • B(h);CHECK,OGATE,XS(G)::B(J),XB(h)
    • B(h);N_PINS(G)::S(G)
    • S(e);N_GUARD::P(A)
    • S(e);SBLOCK::S(F)
    • S(e);N_PINS(G),N_SPINS(g)::S(G)
  • Actual
    • Q(I);N_PINS(g),P_PINS(e)
    • Threat
      • QAR1(I),XS(e)
    • Vars
      • B(h);CHECK,OGATE,XS(G)::B(J),XB(h)
      • S(g);SBLOCK::S(F)
      • S(g);N_GUARD::P(A)
      • S(g);N_PINS(G),N_SPINS(e)::S(G)
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