MESON Chess Problem Database

Problem Display
PID: 69251 (4Kb2/3N4/3pk3/5N2/8/7P/3Q4/1b6 w - - 0 1)

Colpa, Johannes J

Tijdschrift vd NSB, 1897

4Kb2/3N4/3pk3/5N2/8/7P/3Q4/1b6

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.Sg7#
    • 1...Bg7
      • 2.Sxg7#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Sd4#
      • 1...Bxf5
        • 2.Qg8#
      • 1...Bg7
        • 2.Sxg7#
      • 1...d5
        • 2.Qf6#
        • 2.Qg6#
      • 1...Kd5!
    • 1.Qe2+?
      • 1...Kxf5
        • 2.Qg4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Kd5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sd4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Bxf5
        • 2.Qg8#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bg7
        • 2.Sxg7#
      • 1...d5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::S(C)
    • B(d);N_GUARD::S(C),XB(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • B(a);SBLOCK,XS(C)::QAB(A)
        • B(d);N_GUARD::S(C),XB(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • B(a);SBLOCK,XS(C)::QAB(A)
      • B(a);N_GUARD::QAR2(A),XB(a)
      • B(d);N_GUARD::S(C),XB(d)
      • P(b);SBLOCK::QAR2(A)
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