MESON Chess Problem Database

Problem Display
PID: 224817 (QR6/8/KP6/2pP2P1/1k6/8/2B5/3N4 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1900

QR6/8/KP6/2pP2P1/1k6/8/2B5/3N4

#2

8 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Kb5#
  • Tries
    • 1.Rb7?
      • 1...Ka3
        • 2.Kb5#
      • 1...c4
        • 2.Qf8#
      • 1...Kc4!
    • 1.Re8?
      • 1...Ka3
        • 2.Kb5#
      • 1...Kc4
        • 2.Re4#
      • 1...c4!
    • 1.Rf8?
      • 1...Ka3
        • 2.Kb5#
      • 1...Kc4
        • 2.Rf4#
      • 1...c4!
    • 1.Rg8?
      • 1...Ka3
        • 2.Kb5#
      • 1...c4
        • 2.Qf8#
      • 1...Kc4!
    • 1.Qc6?
      • threat
        • 2.Qa4#
      • 1...Ka3
        • 2.Qa4#
      • 1...c4
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qa7?
      • 1...Ka3
        • 2.Kb5#
      • 1...c4
        • 2.Qe7#
      • 1...Kc4!
    • 1.d6?
      • 1...Ka3
        • 2.Kb5#
      • 1...Kc4
        • 2.Qe4#
      • 1...c4!
  • Keys
    • 1.Rh8!
      • 1...Ka3
        • 2.Kb5#
      • 1...Kc4
        • 2.Rh4#
      • 1...c4
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR(G)+K(E)
  • Tries
    • Try
      • R(H);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • P(b);OGATEB,SBLOCK::QAB(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(H);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • K(a);P-FLIGHT::R(H)
      • Refutation
        • P(b);
    • Try
      • R(H);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • K(a);P-FLIGHT::R(H)
      • Refutation
        • P(b);
    • Try
      • R(H);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • P(b);OGATEB,SBLOCK::QAB(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(a);S_FLIGHT::QAR1(G)
        • P(b);OGATEB,SBLOCK::QAB(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • P(b);OGATEB,SBLOCK::QAB(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAR(G)+K(E)
        • K(a);P-FLIGHT::QAR2(G)
      • Refutation
        • P(b);
  • Actual
    • R(H);
    • Vars
      • K(a);S_FLIGHT::QAR(G)+K(E)
      • K(a);P-FLIGHT::R(H)
      • P(b);OGATEB,SBLOCK::QAB(G)
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