MESON Chess Problem Database

Problem Display
PID: 196842 (1K6/8/5p2/2p1kpN1/3R1N2/1P2b3/Q7/3b4 w - - 0 1)

Fritsch, Karl

Deutsche Schachzeitung, 1919

1K6/8/5p2/2p1kpN1/3R1N2/1P2b3/Q7/3b4

#2

6 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
      • 2.Qb2#
    • 1...Bc2
      • 2.Sf3#
    • 1...Bxb3
      • 2.Sf3#
    • 1...Bf3
      • 2.Sxf3#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bxb3
        • 2.Sf3#
      • 1...Bxd4
        • 2.Qc7#
      • 1...Bf3
        • 2.Sxf3#
      • 1...fxg5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bxb3
        • 2.Sf3#
      • 1...Bxd4
        • 2.Qc7#
      • 1...cxd4
        • 2.Qc7#
      • 1...fxg5
        • 2.Qg7#
      • 1...Bf3
        • 2.Sxf3#
      • 1...c4
        • 2.Sg6#
        • 2.Sf7#
        • 2.Qc5#

FEATURES

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