MESON Chess Problem Database

Problem Display
PID: 159719 (K7/2Q3pB/1p1P3b/3p4/n2kb1N1/3P1p2/2R3p1/4N3 w - - 0 1)

Anonymous

BCPJ (June), 1919

K7/2Q3pB/1p1P3b/3p4/n2kb1N1/3P1p2/2R3p1/4N3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3
      • 2.Sxf3#
    • 1...Bc1
      • 2.Qxg7#
    • 1...Bd2
      • 2.Qxg7#
    • 1...Be3
      • 2.Qxg7#
    • 1...Sb2
      • 2.Qxb6#
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxb6#
      • 2.Qxc3#
  • Tries
    • 1.Bxe4?
      • threat
        • 2.Sxf3#
      • 1...dxe4
        • 2.Qc4#
      • 1...f2
        • 2.Sf3#
      • 1...g1S!
    • 1.Rc3?
      • threat
        • 2.Sc2#
      • 1...Bxd3
        • 2.Sxf3#
        • 2.Rxd3#
      • 1...Sxc3
        • 2.Qxb6#
      • 1...Sc5!
    • 1.Qxb6+?
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qb2#
        • 2.Qb4#
      • 1...Sxb6+!
    • 1.d7?
      • threat
        • 2.Qe5#
      • 1...Sc3
        • 2.Qxb6#
        • 2.Qxc3#
      • 1...Bf4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qxa4#
      • 1...Bxd3
        • 2.Sxf3#
      • 1...Sc3
        • 2.Qxb6#
      • 1...Bd2
        • 2.Qxg7#
      • 1...Sb2
        • 2.Qxb6#
      • 1...Sc5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD,XP(C)::S(A),XP(b)
    • B(h);N_GUARD::QAB(F),XP(i)
  • Tries
    • Try
      • B(G);XB(e)
      • Threat
        • S(A),XP(b)
      • Vars
        • P(f);N_GUARD,XB(G)::QAR1(F)
        • P(b);::S(A)
      • Refutation
        • P(a);
    • Try
      • R(B);
      • Threat
        • S(A)
      • Vars
        • S(c);N_GUARD,SBLOCK,XR(B)::QAB(F),XP(g)
      • Refutation
        • S(c);
    • Try
      • Q(F);CHECK,XP(g)
      • Refutation
        • S(c);CHECK,XQ(F)
    • Try
      • P(E);
      • Threat
        • QAB1(F)
      • Refutation
        • B(h);
  • Actual
    • Q(F);P_PINP(g)
    • Threat
      • QAR(F),XS(c)
    • Vars
      • B(e);N_GUARD,XP(C)::S(A),XP(b)
      • S(c);N_GUARD::QAB(F),XP(g)
      • B(h);N_GUARD::QAB(F),XP(i)
      • S(c);N_SPINP(g),OGATE::QAB(F)
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