MESON Chess Problem Database

Problem Display
PID: 223167 (8/B4n1K/4pP2/1P2k1p1/4N3/Q2PN1P1/b7/b7 w - - 0 1)

Kockelkorn, Carl

Kohtz, Johannes

Philadelphia Times, 1886

8/B4n1K/4pP2/1P2k1p1/4N3/Q2PN1P1/b7/b7

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bb1
      • 2.Qc5#
      • 2.Qxa1#
    • 1...Bb3
      • 2.Qxa1#
    • 1...Bc4
      • 2.Qxa1#
    • 1...Bd5
      • 2.Qxa1#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sh8
      • 2.Qd6#
  • Tries
    • 1.Sg4+?
      • 1...Kd5
        • 2.Qc5#
        • 2.Qxa2#
      • 1...Kf5!
    • 1.Sf2?
      • threat
        • 2.Sfg4#
      • 1...Kxf6
        • 2.Sfg4#
      • 1...g4
        • 2.Sfxg4#
      • 1...Sh6!
    • 1.Bb8+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kd4!
    • 1.Qc1?
      • threat
        • 2.Qxa1#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bb1
        • 2.Qc5#
      • 1...Bd4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd7#
      • 1...Kd4
        • 2.Sd7#
      • 1...Kd6
        • 2.Bb8#
      • 1...Kxf6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(b);OGATE::QAB(A),XB(a)
    • S(f);N_GUARD::QAB1(A),XS(f)
    • S(f);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT,XP(G)::S(E)
        • P(d);::S(E),XP(d)
      • Refutation
        • S(f);
    • Try
      • B(H);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • B(a);N_GUARD::QAB(A),XB(a)
        • B(b);N_GUARD::QAR2(A)
      • Refutation
        • B(a);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::B(H)+S(E)
      • K(c);S_FLIGHT::B(H)
      • K(c);S_FLIGHT,XP(G)::S(E)
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