MESON Chess Problem Database

Problem Display
PID: 71234 (8/3p1NQ1/1p1PPq2/1rk1p3/2N1B3/PP6/4n3/K2R1b2 w - - 0 1)

Bonivento, Oscar

HM., Le Probleme, 1964-1966

8/3p1NQ1/1p1PPq2/1rk1p3/2N1B3/PP6/4n3/K2R1b2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qxe5#
    • 1...Qe7
      • 2.Qxe5#
    • 1...Qd8
      • 2.Qxe5#
    • 1...Qf2
      • 2.Qxe5#
    • 1...Qf3
      • 2.Qxe5#
    • 1...Qg6
      • 2.Qxe5#
    • 1...Qh6
      • 2.Qxe5#
    • 1...Qxf7
      • 2.Qxe5#
    • 1...Sf4
      • 2.Qg1#
  • Tries
    • 1.Scxe5?
      • threat
        • 2.Rd5#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qxe6
        • 2.Sd3#
      • 1...Sc3
        • 2.Sxd7#
      • 1...Sd4
        • 2.Sxd7#
      • 1...Sf4
        • 2.Qg1#
      • 1...dxe6!
    • 1.Sd8?
      • threat
        • 2.Sb7#
        • 2.Rd5#
      • 1...Qxd8
        • 2.Qxe5#
      • 1...Qxe6
        • 2.Sb7#
      • 1...dxe6
        • 2.Sb7#
        • 2.Qc7#
      • 1...Rb4
        • 2.Rd5#
      • 1...Ra5
        • 2.Rd5#
      • 1...Sc3
        • 2.Sb7#
      • 1...Sd4
        • 2.Sb7#
      • 1...Sf4
        • 2.Sb7#
        • 2.Qg1#
      • 1...Rxb3!
  • Keys
    • 1.Sfxe5!
      • threat
        • 2.Rd5#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qxe6
        • 2.Sd3#
      • 1...dxe6
        • 2.Qc7#
      • 1...Sc3
        • 2.Sxd7#
      • 1...Sd4
        • 2.Sxd7#
      • 1...Sf4
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • Q(g);OGATE::QAR2(J),XP(e)
    • Q(g);OGATE,XS(I)::QAR2(J),XP(e)
    • S(b);N_GUARD,S_CUTQ(g)::QAB(J)
  • Tries
    • Try
      • S(E);P_SPINS(E),XP(e)
      • Threat
        • R1(B)
      • Vars
        • Q(g);CHECK,OGATE,XS(E)::QAR2(J),XQ(g)
        • Q(g);N_PINS(E),XP(H)::S(E)
        • S(b);N_PINS(E)::S(E),XP(h)
        • S(b);N_GUARD,S_CUTQ(g)::QAB(J)
      • Refutation
        • P(h);XP(H)
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);OGATE,XS(I)::QAR2(J),XP(e)
        • Q(g);XP(H)::S(I)
        • R(c);::R1(B)
        • R(c);P_PINP(C)::R1(B)
        • S(b);::S(I)
      • Refutation
        • R(c);XP(D)
  • Actual
    • S(I);P_SPINS(I),XP(e)
    • Threat
      • R1(B)
    • Vars
      • Q(g);CHECK,OGATE,XS(I)::QAR2(J),XQ(g)
      • Q(g);N_PINS(I),XP(H)::S(I)
      • P(h);OGATE,XP(H)::QAR2(J)
      • S(b);N_PINS(I)::S(I),XP(h)
      • S(b);N_GUARD,S_CUTQ(g)::QAB(J)
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