MESON Chess Problem Database

Problem Display
PID: 251623 (8/1p1p4/pQ1BkpB1/Kn3N1n/1N2p3/4P3/8/8 w - - 0 1)

Korponai, Jozsef

6th Comm., Jerusalem Post, 1951

(First published on Fri Dec 28 1951)

8/1p1p4/pQ1BkpB1/Kn3N1n/1N2p3/4P3/8/8

#2

7 + 8

119 Tidskrift for Schack 1952
15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Sd4#
    • 1...Sc3
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sxd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Sd4#
    • 1...Sc7
      • 2.Sd4#
    • 1...Sg3
      • 2.Sg7#
    • 1...Sf4
      • 2.Sg7#
    • 1...Sg7
      • 2.Sxg7#
  • Tries
    • 1.Bh2+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Bg3+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Bf4+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Bc7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Bb8+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Qc5?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sxd6
        • 2.Qxd6#
        • 2.Qd5#
      • 1...Sa3
        • 2.Sd4#
        • 2.Qd5#
      • 1...Sc3
        • 2.Sd4#
      • 1...Sc7
        • 2.Sd4#
      • 1...Sf4
        • 2.Sg7#
      • 1...b6+!
    • 1.Qd8?
      • threat
        • 2.Qe7#
        • 2.Qe8#
        • 2.Qg8#
      • 1...Sxd6
        • 2.Qe7#
      • 1...Sc7
        • 2.Qe7#
        • 2.Qg8#
      • 1...Sg7
        • 2.Qe7#
        • 2.Qg8#
      • 1...b6+!
    • 1.Qxb7?
      • threat
        • 2.Qxe4#
        • 2.Qd5#
      • 1...Sxd6
        • 2.Qd5#
      • 1...Sc7
        • 2.Qxe4#
      • 1...Sg3
        • 2.Qd5#
      • 1...Sf4
        • 2.Qxe4#
      • 1...Sc3!
  • Keys
    • 1.Sd5!
      • 1...Kxd5
        • 2.Bf7#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sa3
        • 2.Sc7#
      • 1...Sc3
        • 2.Sc7#
      • 1...Sd4
        • 2.Sc7#
      • 1...Sa7
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sg3
        • 2.Sf4#
      • 1...Sf4
        • 2.Sxf4#
      • 1...Sg7
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 8
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD::S(D),XS(b)
    • S(b);OGATE,P_SPINS(b),XB(F)::QAR1(E),XS(b)
    • S(c);N_GUARD::S(D)
    • S(c);N_GUARD::S(D),XS(c)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::S(D)
        • S(c);N_GUARD::S(D)
      • Refutation
        • P(g);CHECK
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);XB(F)::QAR1(E)
      • Refutation
        • P(g);CHECK
    • Try
      • Q(E);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XB(F)::QAB1(E)
        • S(b);::QAR2(E),XP(a)
        • S(c);::QAB1(E)
        • S(c);::QAR2(E),XP(a)
      • Refutation
        • S(b);
  • Actual
    • S(B);
    • Vars
      • K(e);N_GUARD,S_FLIGHT,XS(B)::B(G)
      • S(b);OGATE,P_SPINS(b),XB(F)::QAR1(E),XS(b)
      • S(b);N_GUARD::S(B)
      • S(b);N_GUARD::S(B),XS(b)
      • S(c);N_GUARD::S(B)
      • S(c);N_GUARD::S(B),XS(c)
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