MESON Chess Problem Database

Problem Display
PID: 224651 (8/Q7/n2p1N1P/3Pkpb1/5p2/5KP1/N7/8 w - - 0 1)

Witte, Ernst

Charleston Sunday News, 1888

8/Q7/n2p1N1P/3Pkpb1/5p2/5KP1/N7/8

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qg7#
  • Tries
    • 1.Qe3+?
      • 1...Kxf6
        • 2.Qe6#
      • 1...fxe3!
    • 1.gxf4+?
      • 1...Kxf6
        • 2.Qg7#
      • 1...Bxf4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Bxf6
        • 2.gxf4#
      • 1...Sxb4
        • 2.Qa1#
      • 1...Sc5
        • 2.Qa1#
      • 1...Sb8
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • P(a);XQ(G)
    • Try
      • P(C);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB1(G)
      • Refutation
        • B(d);XP(C)
  • Actual
    • S(A);
    • Threat
      • S(E)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
      • B(d);N_GUARD,SBLOCK,XS(E)::P(C),XP(a)
      • S(e);OGATE,XS(A)::QAB(G)
      • S(e);OGATE::QAB(G)
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