MESON Chess Problem Database

Problem Display
PID: 77303 (8/8/4pp2/5k1P/2p2P2/n3bK2/Q3P3/8 w - - 0 1)

Janet, Frank

Source?, 1914

8/8/4pp2/5k1P/2p2P2/n3bK2/Q3P3/8

#2

5 + 6

2643 Good Companions (July) 1917

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.e4#
    • 1...Bg1
      • 2.e4#
    • 1...Bd2
      • 2.e4#
    • 1...Bf2
      • 2.e4#
    • 1...Bd4
      • 2.e4#
    • 1...Bc5
      • 2.e4#
    • 1...Bb6
      • 2.e4#
    • 1...Ba7
      • 2.e4#
    • 1...Sb1
      • 2.Qxb1#
      • 2.Qc2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sb5
      • 2.Qb1#
      • 2.Qc2#
  • Tries
    • 1.Qb1+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sxb1!
    • 1.Qxc4?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Bd4
        • 2.Qd3#
        • 2.e4#
      • 1...e5
        • 2.Qc8#
      • 1...Sxc4!
  • Keys
    • 1.Qd2!
      • 1...Bxd2
        • 2.e4#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...e5
        • 2.Qd7#
      • 1...Bg1
        • 2.e4#
      • 1...Bf2
        • 2.e4#
      • 1...Bd4
        • 2.e4#
      • 1...Bc5
        • 2.e4#
      • 1...Bb6
        • 2.e4#
      • 1...Ba7
        • 2.e4#
      • 1...Sb1
        • 2.Qc2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sb5
        • 2.Qc2#
      • 1...c3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(b);OGATE::P(B)
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,XP(D)::QAR1(A),XB(b)
        • P(e);OGATEB::QAB(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • B(b);OGATE,XQ(A)::P(B)
      • B(b);OGATE,XP(D)::QAR1(A),XB(b)
      • P(e);OGATEB::QAB(A)
      • B(b);OGATE::P(B)
      • S(a);N_GUARD::QAB(A)
      • S(a);N_GUARD::QAB(A),XS(a)
      • P(c);N_GUARD::QAB(A)
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