MESON Chess Problem Database

Problem Display
PID: 254519 (8/B7/3R1n1p/1Q1q1P2/3Nk3/3N1RpK/b5P1/4b3 w - - 0 1)

Belliboni, Caetano

Probleemblad, 1983

8/B7/3R1n1p/1Q1q1P2/3Nk3/3N1RpK/b5P1/4b3

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Qe5#
    • 1...Qc4
      • 2.Qe5#
    • 1...Qc6
      • 2.Qe5#
    • 1...Qb7
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qa8
      • 2.Qe5#
    • 1...Qg8
      • 2.Qe5#
    • 1...Qxd4
      • 2.Rxd4#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qxf5+
      • 2.Qxf5#
  • Tries
    • 1.Sf2+?
      • 1...Ke5
        • 2.Re6#
      • 1...gxf2
        • 2.Qe2#
      • 1...Bxf2!
    • 1.Re6+?
      • 1...Qe5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Qxe6!
    • 1.Qxd5+?
      • 1...Sxd5
        • 2.Re6#
      • 1...Bxd5!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Rf4#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Qxd3
        • 2.Re6#
      • 1...Qxd6
        • 2.Re3#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Qc5
        • 2.Sbxc5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Sh5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(e);OGATE::QAR1(F)
    • Q(e);OGATE,XS(E)::R1(H),XQ(e)
    • Q(e);OGATE::QAR1(F),XQ(e)
    • Q(e);CHECK,OGATE,XP(G)::QAB1(F),XQ(e)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINQ(e)::R1(H)
        • P(c);XS(B)::QAR2(F)
      • Refutation
        • B(a);XS(B)
    • Try
      • R(H);CHECK
      • Refutation
        • Q(e);P_PINP(G),XR(H)
    • Try
      • Q(F);CHECK,XQ(e)
      • Vars
        • S(f);SBLOCK,XQ(F)::R(H)
      • Refutation
        • B(b);XQ(F)
  • Actual
    • S(E);
    • Threat
      • R1(C)
    • Vars
      • Q(e);CHECK,OGATE,XP(G)::QAB1(F),XQ(e)
      • Q(e);N_GUARD,XS(B)::R(H)
      • Q(e);XR(H)::R1(C)
      • Q(e);OGATE::R1(H),XQ(e)
      • Q(e);N_GUARD::S(E),XQ(e)
      • Q(e);OGATE::QAR1(F),XQ(e)
      • B(a);N_GUARD::S(E),XB(a)
      • S(f);N_GUARD::QAB1(F),XQ(e)
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