MESON Chess Problem Database

Problem Display
PID: 85769 (8/8/1B1p4/4k1P1/3N4/8/6K1/QB6 w - - 0 1)

Speckmann, Werner

Berliner Morgenpost, 1965

8/8/1B1p4/4k1P1/3N4/8/6K1/QB6

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Bc7#
  • Tries
    • 1.Kf3?
      • 1...d5
        • 2.Bc7#
      • 1...Kd5!
    • 1.Kg3?
      • 1...d5
        • 2.Bc7#
      • 1...Kd5!
    • 1.Bd3?
      • 1...Kd5
        • 2.Qa5#
      • 1...d5
        • 2.Bc7#
      • 1...Kf4!
    • 1.Qb2?
      • 1...Kd5
        • 2.Qb5#
      • 1...d5
        • 2.Bc7#
      • 1...Kf4!
    • 1.Qc3?
      • 1...Kf4
        • 2.Qg3#
      • 1...d5
        • 2.Bc7#
        • 2.Qg3#
        • 2.Qc7#
      • 1...Kd5!
    • 1.Qa3?
      • 1...Kf4
        • 2.Qg3#
      • 1...d5
        • 2.Qg3#
      • 1...Kd5!
    • 1.Qa8?
      • threat
        • 2.Qe4#
      • 1...d5
        • 2.Qb8#
      • 1...Kf4!
  • Keys
    • 1.Qa4!
      • 1...Kf4
        • 2.Sf3#
      • 1...Kd5
        • 2.Qb5#
      • 1...d5
        • 2.Bc7#

This is a version of 235475

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::B(F)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);OGATEB,SBLOCK::B(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);OGATEB,SBLOCK::B(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(b);OGATEB,SBLOCK::B(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);OGATEB,SBLOCK::B(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR(A)+S(D)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);OGATEB,SBLOCK::B(F)
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