MESON Chess Problem Database

Problem Display
PID: 69238 (1B6/8/7p/n7/3pk3/5R2/6Q1/5N1K w - - 0 1)

Colpa, Johannes J

Tijdschrift vd NSB, 1897

1B6/8/7p/n7/3pk3/5R2/6Q1/5N1K

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Rf4#
  • Tries
    • 1.Qc2+?
      • 1...Kxf3
        • 2.Qg2#
      • 1...d3
        • 2.Qxd3#
      • 1...Kd5!
    • 1.Qg5?
      • threat
        • 2.Sd2#
        • 2.Qf5#
      • 1...Kxf3
        • 2.Qg2#
      • 1...d3
        • 2.Rf4#
      • 1...Sb3
        • 2.Qf5#
      • 1...Sc4
        • 2.Qf5#
      • 1...hxg5!
    • 1.Qg6+?
      • 1...Kxf3
        • 2.Qg2#
      • 1...Kd5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Sd2#
      • 1...Kxf3
        • 2.Qg2#
      • 1...Sb3
        • 2.Qa8#
      • 1...Sc4
        • 2.Qa8#
      • 1...d3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::QAB(C)+R(D),DCHECK
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
        • P(a);P_SPINP(a)::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
        • P(a);SBLOCK::R1(D)
        • S(c);::QAB1(C)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(A)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
      • S(c);OGATE::QAB(C)
      • P(a);SBLOCK::R1(D)
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Developed and maintained by Brian Stephenson.
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