MESON Chess Problem Database

Problem Display
PID: 234556 (2K5/8/3p4/1PPp4/3k1N2/3B4/1R3R2/4Q3 w - - 0 1)

Speckmann, Werner

Berliner Morgenpost, 1967

2K5/8/3p4/1PPp4/3k1N2/3B4/1R3R2/4Q3

#2

8 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kb7?
      • 1...Kxc5
        • 2.Se6#
        • 2.Qc3#
        • 2.Qb4#
      • 1...dxc5!
    • 1.Kc7?
      • 1...Kxc5
        • 2.Se6#
        • 2.Qc3#
        • 2.Qb4#
      • 1...dxc5!
    • 1.Rbe2?
      • threat
        • 2.Qb4#
      • 1...dxc5
        • 2.Qa1#
      • 1...Kxc5!
    • 1.Qc3+?
      • 1...Ke3
        • 2.Sg2#
        • 2.Sxd5#
        • 2.Bb1#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
        • 2.Rbe2#
      • 1...Kxc3!
    • 1.Qb4+?
      • 1...Ke3
        • 2.Rbe2#
      • 1...Ke5!
    • 1.Qg1?
      • 1...Kc3
        • 2.Rfc2#
      • 1...Ke3
        • 2.Rf1#
      • 1...Kxc5
        • 2.Rfc2#
      • 1...Ke5
        • 2.Qg7#
      • 1...dxc5!
    • 1.Qe3+?
      • 1...Kc3
        • 2.Sxd5#
        • 2.Bf1#
        • 2.Rfc2#
      • 1...Kxe3!
    • 1.b6?
      • 1...Kxc5
        • 2.Qc3#
      • 1...dxc5!
  • Keys
    • 1.Qa1!
      • 1...Kc3
        • 2.Rb1#
      • 1...Ke3
        • 2.Rbe2#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Ke5
        • 2.Rbe2#
      • 1...dxc5
        • 2.Rbe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Refutation
        • P(c);XP(G)
    • Try
      • K(H);P-FLIGHT
      • Refutation
        • P(c);XP(G)
    • Try
      • R(B);
      • Threat
        • QAR2(A)
      • Vars
        • P(c);SBLOCK,XP(G)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::R1(C)
        • K(a);S_FLIGHT::QAB(A)+R(C)
        • K(a);S_FLIGHT,XP(G)::QAB(A)+R(C),DCHECK
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • P(c);XP(G)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • P(F);
      • Vars
        • K(a);S_FLIGHT,XP(G)::QAR2(A)
      • Refutation
        • P(c);XP(G)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)+R(B)
      • K(a);S_FLIGHT::R1(B)
      • K(a);OGATEB,S_FLIGHT,XP(G)::QAB(A)
      • K(a);S_FLIGHT::QAB(A)+R(B),DCHECK
      • P(c);SBLOCK,XP(G)::QAB(A)+R(B)
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