MESON Chess Problem Database

Problem Display
PID: 132861 (5k2/7Q/5Nn1/4p2B/4K3/8/8/8 w - - 0 1)

Akerblom, Johan Axel

Tidskrift for Schack, 1930

5k2/7Q/5Nn1/4p2B/4K3/8/8/8

#2

4 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Sd7#
      • 2.Qf7#
    • 1...Sh4
      • 2.Sd7#
      • 2.Qf7#
    • 1...Se7
      • 2.Sd7#
      • 2.Qh6#
      • 2.Qf7#
    • 1...Sh8
      • 2.Sd7#
  • Tries
    • 1.Ke3?
      • 1...Sf4
        • 2.Sd7#
        • 2.Qf7#
      • 1...Sh4
        • 2.Sd7#
        • 2.Qf7#
      • 1...Se7
        • 2.Sd7#
        • 2.Qh6#
        • 2.Qf7#
      • 1...Sh8
        • 2.Sd7#
      • 1...e4!
    • 1.Se8?
      • 1...Sf4
        • 2.Qf7#
        • 2.Qg7#
      • 1...Sh4
        • 2.Qf7#
        • 2.Qg7#
      • 1...Se7
        • 2.Qf7#
        • 2.Qg7#
      • 1...Sh8
        • 2.Qg7#
      • 1...Kxe8!
    • 1.Sg8?
      • 1...Ke8
        • 2.Qe7#
      • 1...Sf4
        • 2.Qf7#
      • 1...Sh4
        • 2.Qf7#
      • 1...Se7
        • 2.Qf7#
      • 1...Sh8!
  • Keys
    • 1.Sd5!
      • 1...Ke8
        • 2.Qe7#
      • 1...Sf4
        • 2.Qf7#
        • 2.Qh8#
      • 1...Sh4
        • 2.Qf7#
        • 2.Qh8#
      • 1...Se7
        • 2.Qf7#
      • 1...Sh8
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);::S(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);::S(C)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Vars
        • S(b);::QAB1(D)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(b),XS(C)
    • Try
      • S(C);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR1(D)
        • S(b);::QAR1(D)
      • Refutation
        • S(b);
  • Actual
    • S(C);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::QAR1(D)
      • S(b);::QAR1(D)
      • S(b);N_GUARD::QAR2(D),XS(b)
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