MESON Chess Problem Database

Problem Display
PID: 119996 (8/2N1B3/6B1/1p1p4/2Nk1p2/1p5Q/4bK2/8 w - - 0 1)

Ivestberg, CE

Nya Dagligt Allehanda, 1917

8/2N1B3/6B1/1p1p4/2Nk1p2/1p5Q/4bK2/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bxc4
      • 2.Qh8#
    • 1...Bg4
      • 2.Qd3#
    • 1...Bh5
      • 2.Qd3#
    • 1...bxc4
      • 2.Qh8#
    • 1...dxc4
      • 2.Qh8#
  • Tries
    • 1.Kxe2?
      • threat
        • 2.Qd3#
      • 1...Kxc4
        • 2.Qd3#
      • 1...bxc4
        • 2.Qh8#
      • 1...dxc4
        • 2.Qh8#
      • 1...f3+!
    • 1.Sb2?
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Qh8#
      • 1...Bh5!
    • 1.Sd2?
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Qh8#
      • 1...Bh5!
    • 1.Sa3?
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Qh8#
      • 1...Bh5!
    • 1.Sa5?
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qh8#
      • 1...Bh5!
    • 1.Sb6?
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Qh8#
      • 1...Bh5!
    • 1.Bb4?
      • threat
        • 2.Qc3#
      • 1...Kxc4
        • 2.Qc3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...f3
        • 2.Qg4#
        • 2.Qh4#
      • 1...Bf3!
    • 1.Bf6+?
      • 1...Kxc4
        • 2.Qc3#
      • 1...Kc5!
    • 1.Qe3+?
      • 1...Kxc4
        • 2.Qc5#
      • 1...fxe3+!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Sxb5#
      • 1...Kc3
        • 2.Sxb5#
      • 1...Kxc4
        • 2.Se6#
      • 1...Bxc4
        • 2.Qh8#
      • 1...bxc4
        • 2.Qh8#
      • 1...dxc4
        • 2.Qh8#
      • 1...b4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAR1(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • B(a);SBLOCK,XS(C)::QAB(B)
    • P(e);SBLOCK,XS(C)::QAB(B)
    • P(f);SBLOCK,XS(C)::QAB(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XB(a)
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT,XS(C)::QAB1(B)
        • P(e);SBLOCK,XS(C)::QAB(B)
        • P(f);SBLOCK,XS(C)::QAB(B)
      • Refutation
        • P(d);CHECK
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • B(a);
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • B(a);
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • B(a);
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Refutation
        • B(a);
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • B(a);
    • Try
      • B(F);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT,XS(C)::QAR1(B)
        • B(a);N_GUARD::QAR1(B),XB(a)
      • Refutation
        • B(a);
    • Try
      • B(F);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • P(d);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(E),XP(e)
    • Vars
      • K(c);S_FLIGHT::S(E),XP(e)
      • K(c);P-FLIGHT,XS(C)::QAR(B)+S(E)
      • B(a);SBLOCK,XS(C)::QAB(B)
      • P(e);SBLOCK,XS(C)::QAB(B)
      • P(f);SBLOCK,XS(C)::QAB(B)
      • P(e);::S(E)
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