MESON Chess Problem Database

Problem Display
PID: 3074 (8/8/1KN5/3pP1p1/B1k3P1/4P3/n3P3/2nN1Q2 w - - 0 1)

Butler, GV

Source?, 1918

8/8/1KN5/3pP1p1/B1k3P1/4P3/n3P3/2nN1Q2

#2

9 + 5

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe2
      • 2.Qxe2#
    • 1...Sb3
      • 2.Bb5#
    • 1...Sd3
      • 2.exd3#
    • 1...Sc3
      • 2.Sb2#
    • 1...Sb4
      • 2.Sa5#
    • 1...d4
      • 2.Qf7#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Sb2#
        • 2.Sa5#
      • 1...Sxe2
        • 2.Sb2#
        • 2.Qxe2#
      • 1...Sb3
        • 2.Sb2#
        • 2.Bb5#
      • 1...Sd3
        • 2.Sa5#
      • 1...Sc3
        • 2.Sb2#
        • 2.Qxc3#
      • 1...d4!
    • 1.Qf2?
      • 1...Sxe2
        • 2.Qxe2#
      • 1...d4
        • 2.Qf7#
      • 1...Sb3
        • 2.Bb5#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sb4
        • 2.Sa5#
      • 1...Sd3!
    • 1.Qf3?
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Sb3
        • 2.Bb5#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sb4
        • 2.Sa5#
      • 1...d4
        • 2.Qf7#
      • 1...Sd3!
    • 1.Qf4+?
      • 1...d4
        • 2.Qxd4#
        • 2.Qf7#
      • 1...gxf4!
    • 1.Qf5?
      • 1...d4
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sd3
        • 2.Qxd3#
        • 2.exd3#
      • 1...Sb3
        • 2.Bb5#
        • 2.Qd3#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sb4
        • 2.Sa5#
      • 1...Sxe2!
    • 1.Qf8?
      • threat
        • 2.Sa5#
        • 2.Qc5#
      • 1...d4
        • 2.Qc5#
        • 2.Qf7#
        • 2.Qg8#
      • 1...Sd3
        • 2.Sa5#
      • 1...Sb3
        • 2.Bb5#
      • 1...Sxe2!
    • 1.e4?
      • 1...Sxe2
        • 2.Qxe2#
      • 1...dxe4
        • 2.Qf7#
      • 1...Sd3
        • 2.exd3#
      • 1...Sb3
        • 2.Bb5#
        • 2.e3#
      • 1...Sc3
        • 2.Sb2#
        • 2.Se3#
      • 1...d4
        • 2.Qf7#
      • 1...Sb4!
    • 1.e6?
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Sd3
        • 2.exd3#
      • 1...Sb3
        • 2.Bb5#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sb4
        • 2.Sa5#
        • 2.Se5#
      • 1...d4!
  • Keys
    • 1.Bc2!
      • 1...Sxe2
        • 2.Qxe2#
      • 1...d4
        • 2.Qf7#
      • 1...Sb3
        • 2.Bd3#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sb4
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,P_SPINS(a),XP(C)::QAB(B),XS(a)
    • S(a);SBLOCK::B(E)
    • S(a);OGATE::P(C),XS(a)
    • S(b);SBLOCK::S(A)
    • S(b);SBLOCK::S(I)
    • P(d);OGATEB::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(I)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Vars
        • S(a);OGATE,XP(C)::QAB(B),XS(a)
        • P(d);OGATEB::QAB(B)
        • S(a);SBLOCK::B(E)
        • S(b);SBLOCK::S(A)
        • S(b);SBLOCK::S(I)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);OGATE,XP(C)::QAB(B),XS(a)
        • S(a);SBLOCK::B(E)
        • S(b);SBLOCK::S(A)
        • S(b);SBLOCK::S(I)
        • P(d);OGATEB::QAB(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(e);XQ(B)
    • Try
      • Q(B);
      • Vars
        • S(b);SBLOCK::S(A)
        • S(b);SBLOCK::S(I)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(I)
        • S(a);SBLOCK::B(E)
      • Refutation
        • S(a);XP(C)
    • Try
      • P(D);
      • Vars
        • S(a);OGATE,P_SPINS(a),XP(C)::QAB(B),XS(a)
        • P(d);OGATEB,XP(D)::QAB(B)
        • S(a);OGATE::P(C),XS(a)
        • P(d);OGATEB::QAB(B)
      • Refutation
        • S(b);
    • Try
      • P(G);
      • Vars
        • S(a);OGATE,P_SPINS(a),XP(C)::QAB(B),XS(a)
        • S(a);OGATE::P(C),XS(a)
        • S(a);SBLOCK::B(E)
        • S(b);SBLOCK::S(A)
      • Refutation
        • P(d);
  • Actual
    • B(E);
    • Vars
      • S(a);OGATE,P_SPINS(a),XP(C)::QAB(B),XS(a)
      • P(d);OGATEB::QAB(B)
      • S(a);N_GUARD,SBLOCK::B(E)
      • S(a);OGATE::P(C),XS(a)
      • S(b);SBLOCK::S(A)
      • S(b);SBLOCK::S(I)
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