MESON Chess Problem Database

Problem Display
PID: 5070 (2B1N3/2P3nn/1p6/1Qbk4/p2P4/5P2/8/3R3K w - - 0 1)

Colpa, Johannes J

1st Prize, Tijdschrift vd NSB, 1898

2B1N3/2P3nn/1p6/1Qbk4/p2P4/5P2/8/3R3K

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Bb7#
  • Tries
    • 1.Sf6+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Sxf6!
    • 1.Qc4+?
      • 1...Kc6
        • 2.d5#
      • 1...Kxc4!
    • 1.Qb3+?
      • 1...Kc6
        • 2.d5#
      • 1...axb3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Bb7#
      • 1...Kc6
        • 2.d5#
      • 1...Bxd4
        • 2.Qb5#
      • 1...Sxe8
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);SBLOCK::B(G)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR1(E)
      • Refutation
        • S(f);XS(H)
    • Try
      • Q(E);CHECK,N_PINB(b)
      • Vars
        • K(c);OGATE,P_SPINB(b),S_FLIGHT::P(D)
      • Refutation
        • K(c);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK,N_PINB(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::P(D)
      • Refutation
        • P(a);XQ(E)
  • Actual
    • Q(E);N_PINB(b)
    • Threat
      • B(G)
    • Vars
      • K(c);OGATE,S_FLIGHT::P(D)
      • B(b);OGATEB,P_SPINB(b),XP(D)::QAR2(E)
      • S(e);N_GUARD,XS(H)::QAB1(E)
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