MESON Chess Problem Database

Problem Display
PID: 210574 (8/8/7b/5B1p/3Q1n1k/8/3N4/7K w - - 0 1)

Jespersen, Karl Lorenz Jesper

Land og Folk, 1967

8/8/7b/5B1p/3Q1n1k/8/3N4/7K

#2

4 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Qf2#
    • 1...Bg7
      • 2.Qxf4#
    • 1...Bf8
      • 2.Qxf4#
  • Tries
    • 1.Kg1?
      • 1...Kg3
        • 2.Qf2#
      • 1...Bg5
        • 2.Qf2#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qxf4#
      • 1...Kg5!
    • 1.Sf1?
      • 1...Bg5
        • 2.Qf2#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qf6#
        • 2.Qxf4#
      • 1...Kg5!
    • 1.Qe4?
      • 1...Kg3
        • 2.Qe1#
      • 1...Bg5
        • 2.Qe1#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qxf4#
      • 1...Kg5!
  • Keys
    • 1.Qe5!
      • 1...Kg3
        • 2.Qe1#
      • 1...Kg5
        • 2.Sf3#
      • 1...Se2
        • 2.Sf3#
      • 1...Bg5
        • 2.Qe1#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qxf4#
      • 1...Sg2
        • 2.Sf3#
      • 1...Sd3
        • 2.Sf3#
      • 1...Sh3
        • 2.Sf3#
      • 1...Sd5
        • 2.Sf3#
      • 1...Se6
        • 2.Sf3#
      • 1...Sg6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(d);SBLOCK::QAB(C)
    • B(d);N_GUARD::QAR2(C),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB1(C)
        • B(d);SBLOCK::QAB(C)
        • B(d);N_GUARD::QAR2(C),XS(a)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • S(B);
      • Vars
        • B(d);SBLOCK::QAB(C)
        • B(d);N_GUARD::QAR2(C),XS(a)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB(C)
        • B(d);SBLOCK::QAB(C)
        • B(d);N_GUARD::QAR2(C),XS(a)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
  • Actual
    • Q(C);N_PINS(a)
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB(C)
      • K(b);S_FLIGHT::S(B)
      • S(a);::S(B)
      • B(d);SBLOCK::QAB(C)
      • B(d);N_GUARD::QAR2(C),XS(a)
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