MESON Chess Problem Database

Problem Display
PID: 226462 (1Q6/8/3ppp2/1K1k4/2R5/4pPb1/4N3/1b6 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1909

1Q6/8/3ppp2/1K1k4/2R5/4pPb1/4N3/1b6

#2

5 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rc5#
    • 1...Be5
      • 2.Qb7#
      • 2.Qa8#
    • 1...e5
      • 2.Qg8#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Qb5#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke5
        • 2.Rc5#
      • 1...e5
        • 2.Qg8#
      • 1...Bc2+!
    • 1.Kb4?
      • threat
        • 2.Qb5#
      • 1...Ke5
        • 2.Rc5#
      • 1...e5
        • 2.Qg8#
      • 1...Be1+!
    • 1.Ka5?
      • threat
        • 2.Qb5#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke5
        • 2.Rc5#
      • 1...e5
        • 2.Qg8#
      • 1...Be1+!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Be5
        • 2.Qb7#
        • 2.Qa8#
      • 1...e5
        • 2.Qf7#
      • 1...Ke5!
    • 1.f4?
      • threat
        • 2.Sc3#
        • 2.Rd4#
        • 2.Qb7#
        • 2.Qa8#
      • 1...e5
        • 2.Qg8#
      • 1...Bd3
        • 2.Sc3#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Be1
        • 2.Rd4#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Bxf4!
  • Keys
    • 1.Ka6!
      • threat
        • 2.Qb5#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke5
        • 2.Rc5#
      • 1...e5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_SPINP(e)::R(C)
    • P(f);OGATEB,SBLOCK::QAB(E)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(E)
      • Vars
        • K(d);S_FLIGHT,XR(C)::QAB1(E)
        • K(d);P-FLIGHT,P_SPINP(e)::R(C)
        • P(f);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • B(a);CHECK
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR2(E)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e)::R(C)
        • P(f);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • B(c);CHECK
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR2(E)
      • Vars
        • K(d);S_FLIGHT,XR(C)::QAB1(E)
        • K(d);P-FLIGHT,P_SPINP(e)::R(C)
        • P(f);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • B(c);CHECK
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(f);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • DUALS(4)
      • Vars
        • P(f);OGATEB::QAB(E)
      • Refutation
        • B(c);XP(B)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR2(E)
    • Vars
      • K(d);S_FLIGHT,XR(C)::QAB1(E)
      • K(d);P-FLIGHT,P_SPINP(e)::R(C)
      • P(f);OGATEB,SBLOCK::QAB(E)
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