MESON Chess Problem Database

Problem Display
PID: 206568 (4n3/3QPk2/7B/5BP1/5n2/8/8/5K2 w - - 0 1)

Sonnenfeld, Pal

Nepszava, 1925

4n3/3QPk2/7B/5BP1/5n2/8/8/5K2

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.Qxe8#
    • 1...Se2
      • 2.Qe6#
    • 1...Sg2
      • 2.Qe6#
    • 1...Sd3
      • 2.Qe6#
    • 1...Sh3
      • 2.Qe6#
    • 1...Sd5
      • 2.Qe6#
    • 1...Sh5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Be6#
      • 2.Qe6#
    • 1...Sd6
      • 2.e8Q#
      • 2.e8R#
    • 1...Sf6
      • 2.e8Q#
    • 1...Sc7
      • 2.e8Q#
      • 2.e8R#
    • 1...Sg7
      • 2.e8Q#
      • 2.e8R#
  • Tries
    • 1.Bg4?
      • 1...Kg6
        • 2.Qf5#
      • 1...Se2
        • 2.Qe6#
      • 1...Sg2
        • 2.Qe6#
      • 1...Sd3
        • 2.Qe6#
      • 1...Sh3
        • 2.Qe6#
      • 1...Sd5
        • 2.Qe6#
      • 1...Sh5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Be6#
        • 2.Qe6#
      • 1...Sd6
        • 2.e8Q#
      • 1...Sf6
        • 2.e8Q#
      • 1...Sc7
        • 2.e8Q#
      • 1...Sg7
        • 2.e8Q#
      • 1...Kg8!
    • 1.Qd5+?
      • 1...Kxe7
        • 2.Qd7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sxd5!
    • 1.g6+?
      • 1...Kg8
        • 2.Qxe8#
      • 1...Sxg6
        • 2.Qe6#
      • 1...Kf6!
  • Keys
    • 1.Qc8!
      • 1...Kxe7
        • 2.Qd7#
      • 1...Kg8
        • 2.Qxe8#
      • 1...Se2
        • 2.Qe6#
      • 1...Sg2
        • 2.Qe6#
      • 1...Sd3
        • 2.Qe6#
      • 1...Sh3
        • 2.Qe6#
      • 1...Sd5
        • 2.Qe6#
      • 1...Sh5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd6
        • 2.Qf8#
      • 1...Sf6
        • 2.Qf8#
      • 1...Sc7
        • 2.Qf8#
      • 1...Sg7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(E),XS(c)
    • S(a);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
    • S(c);OGATE::P=Q
  • Tries
    • Try
      • B(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • S(a);N_GUARD::QAB1(E)
        • S(a);N_GUARD::QAB1(E),XS(a)
        • S(c);OGATE::P=Q
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(E)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(E),XS(a)
      • Refutation
        • S(a);XQ(E)
    • Try
      • P(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(E),XS(c)
        • S(a);XP(C)::QAB1(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(E)
      • K(b);P_SPINS(c),S_FLIGHT::QAR2(E),XS(c)
      • S(a);N_GUARD::QAB1(E)
      • S(a);N_GUARD::QAB1(E),XS(a)
      • S(c);OGATE::QAR1(E)
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