MESON Chess Problem Database

Problem Display
PID: 41992 (8/2p5/KpPN2p1/Q2pN3/p1pkpP2/q7/1P1PP3/5b2 w - - 0 1)

Bonivento, Oscar

Comm., L'Echiquier Pape Ty., 1937

8/2p5/KpPN2p1/Q2pN3/p1pkpP2/q7/1P1PP3/5b2

#2

9 + 10

4436 Problemi Opera omnia 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.e3#
    • 1...Qb4
      • 2.e3#
    • 1...Qc5
      • 2.Qc3#
      • 2.e3#
    • 1...Qxd6
      • 2.e3#
    • 1...Qa1
      • 2.e3#
    • 1...Qa2
      • 2.e3#
    • 1...Qc3
      • 2.bxc3#
    • 1...e3
      • 2.Sf3#
    • 1...g5
      • 2.Sf5#
  • Tries
    • 1.Qc3+?
      • 1...Kc5
        • 2.Sb7#
      • 1...Qxc3!
    • 1.Qxb6+?
      • 1...Qc5
        • 2.Sb5#
        • 2.e3#
      • 1...cxb6!
    • 1.Qc5+?
      • 1...Qxc5
        • 2.e3#
      • 1...bxc5
        • 2.Sb5#
      • 1...Kxc5!
  • Keys
    • 1.b4!
      • threat
        • 2.Sb5#
      • 1...Qxb4
        • 2.e3#
      • 1...cxd6
        • 2.Qxb6#
      • 1...axb4 ep
        • 2.e3#
      • 1...cxb4 ep
        • 2.Qc3#
      • 1...e3
        • 2.Sf3#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD,XP(A)::P(C)
    • Q(b);N_GUARD::P(C)
    • Q(b);N_GUARD,XS(I)::P(C)
    • Q(b);OGATE::P(A),XQ(b)
    • P(f);N_GUARD,S_CUTQ(b)::S(F)
    • P(i);N_GUARD::S(I)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);P_SPINP(d),S_FLIGHT::S(I)
      • Refutation
        • Q(b);XQ(E)
    • Try
      • Q(E);CHECK,XP(h)
      • Refutation
        • P(j);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(b);SBLOCK,XQ(E)::P(C)
        • P(h);SBLOCK,XQ(E)::S(I)
      • Refutation
        • K(e);S_FLIGHT,XQ(E)
  • Actual
    • P(A);
    • Threat
      • S(I)
    • Vars
      • Q(b);N_GUARD,XP(A)::P(C)
      • P(j);N_GUARD,XS(I)::QAB(E),XP(h)
      • P(c);EP,P_PINQ(E),S_CUTQ(b),XP(A)::P(C)
      • P(d);EP,OGATE,P_PINP(C),XP(A)::QAB1(E)
      • P(f);N_GUARD,S_CUTQ(b)::S(F)
      • P(h);::S(I),XP(h)
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