MESON Chess Problem Database

Problem Display
PID: 249874 (8/8/8/3p4/3Q4/3K4/pr6/k7 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1975

8/8/8/3p4/3Q4/3K4/pr6/k7

#2

2 + 4

3713 Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb1
      • 2.Qg1#
  • Tries
    • 1.Qc3?
      • 1...Kb1
        • 2.Qe1#
      • 1...d4!
    • 1.Qe5?
      • 1...Kb1
        • 2.Qe1#
      • 1...d4!
    • 1.Qf6?
      • 1...Kb1
        • 2.Qf1#
      • 1...d4!
    • 1.Qg7?
      • 1...Kb1
        • 2.Qg1#
      • 1...d4!
    • 1.Qh8?
      • 1...Kb1
        • 2.Qh1#
      • 1...d4!
  • Keys
    • 1.Ke3!
      • 1...Kb1
        • 2.Qd1#

Anticipated by 231096(1927)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
      • Refutation
        • P(d);N_SPINR(c)
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
      • Refutation
        • P(d);N_SPINR(c)
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
      • Refutation
        • P(d);N_SPINR(c)
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR(B)
      • Refutation
        • P(d);N_SPINR(c)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR2(B)
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Developed and maintained by Brian Stephenson.
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