MESON Chess Problem Database

Problem Display
PID: 205886 (3K4/8/1p1kp3/1n4P1/4P3/1N6/4R3/2Q5 w - - 0 1)

Kaiser, Julius Adam

American Chess Bulletin, 1925

3K4/8/1p1kp3/1n4P1/4P3/1N6/4R3/2Q5

#2

6 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qc7#
    • 1...Sd4
      • 2.Qc7#
    • 1...Sa7
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
  • Tries
    • 1.Rd2+?
      • 1...Sd4
        • 2.Qc7#
      • 1...Ke5!
    • 1.Rf2?
      • 1...Ke5
        • 2.Qf4#
      • 1...Sa3
        • 2.Qc7#
      • 1...Sd4
        • 2.Qc7#
      • 1...Sa7
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...e5
        • 2.Rf6#
      • 1...Sc3!
    • 1.Qf4+?
      • 1...e5
        • 2.Qf6#
      • 1...Kc6!
    • 1.Qc4?
      • threat
        • 2.e5#
      • 1...e5
        • 2.Qd5#
      • 1...Ke5!
    • 1.Qc8?
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sd4
        • 2.Qc7#
      • 1...Sa3
        • 2.Qc7#
      • 1...Sc3
        • 2.Qc7#
      • 1...Sa7
        • 2.Qc7#
      • 1...e5
        • 2.Qd7#
      • 1...Ke5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.e5#
      • 1...Ke5
        • 2.Qh2#
      • 1...Kc6
        • 2.e5#
      • 1...e5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • P(d);OGATEB,SBLOCK::R(B)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • P(D)
      • Vars
        • P(d);N_GUARD::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
        • P(d);SBLOCK::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • P(D)
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • K(c);P-FLIGHT::QAB(A)+P(D)
      • P(d);OGATEB,SBLOCK::QAR(A)
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