MESON Chess Problem Database

Problem Display
PID: 241091 (R4b2/1kNp4/R7/5K2/8/7p/7Q/8 w - - 0 1)

Ahlheim, Karl-Heinz

Shakhmaty (Riga), 1968

R4b2/1kNp4/R7/5K2/8/7p/7Q/8

#2

5 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qc7#
        • 2.Qb8#
      • 1...Bd6
        • 2.Qh1#
      • 1...d6!
    • 1.Sd5?
      • threat
        • 2.Qc7#
        • 2.Qb8#
      • 1...d6
        • 2.Qb2#
      • 1...Bd6!
    • 1.Se6?
      • threat
        • 2.Sd8#
        • 2.Qc7#
        • 2.Qb8#
      • 1...Bd6
        • 2.Qh1#
      • 1...Be7
        • 2.Qc7#
        • 2.Qb8#
      • 1...d6
        • 2.Qb2#
      • 1...dxe6+!
    • 1.Qg1?
      • threat
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kxc7
        • 2.Qb6#
        • 2.Qa7#
      • 1...Bc5!
    • 1.Qb2+?
      • 1...Kxc7
        • 2.Qb6#
        • 2.Qb8#
      • 1...Bb4!
    • 1.Qf2?
      • threat
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kxc7
        • 2.Qb6#
        • 2.Qa7#
      • 1...Bc5!
  • Keys
    • 1.Se8!
      • threat
        • 2.Qc7#
        • 2.Qb8#
      • 1...Bd6
        • 2.Qh1#
      • 1...d6
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);S_CUTP(c)::QAB(A)
      • Refutation
        • P(c);
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);S_CUTB(d)::QAR(A)
      • Refutation
        • B(d);
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • B(d);S_CUTP(c)::QAB(A)
        • P(c);S_CUTB(d)::QAR(A)
      • Refutation
        • P(c);CHECK,XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(d);
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(d);S_CUTP(c)::QAB(A)
      • P(c);S_CUTB(d)::QAR(A)
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