MESON Chess Problem Database

Problem Display
PID: 261341 (1nKN3b/B2NR3/2p3qp/p1P5/Pk4BR/1P1p4/P2P4/1nQ5 w - - 0 1)

Kozdon, Baldur

Neue Zurcher Zeitung, 1988

1nKN3b/B2NR3/2p3qp/p1P5/Pk4BR/1P1p4/P2P4/1nQ5

#2

13 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Se5?
      • threat
        • 2.Rb7#
      • 1...Qf5+
        • 2.Bxf5#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Qe6+
        • 2.Bxe6#
      • 1...Qf7
        • 2.Sxd3#
      • 1...Qh7
        • 2.Bf5#
      • 1...Qg7
        • 2.Sxd3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd7!
    • 1.Bf5+?
      • 1...Bd4
        • 2.Rxd4#
      • 1...Qg4!
    • 1.Re4+?
      • 1...Bd4
        • 2.Rxd4#
      • 1...Qxe4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rb7#
      • 1...Qf5+
        • 2.Bxf5#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Qf7
        • 2.Be6#
      • 1...Qh7
        • 2.Bf5#
      • 1...Qg7
        • 2.Re4#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd7
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(J);
      • Threat
        • R(K)
      • Vars
        • Q(f);CHECK,N_GUARD::R(G)+B(F),XQ(f)
        • Q(f);CHECK,OGATE,P_SPINQ(f),XB(F)::R(G),XQ(f)
        • Q(f);N_GUARD::S(J),XP(b)
        • Q(f);N_GUARD::R(G)+B(F)
        • S(a);N_GUARD,SBLOCK::QAB1(A)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(h);
    • Try
      • B(F);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R(G),XB(i)
      • Refutation
        • Q(f);P_SPINQ(f)
    • Try
      • R(K);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R(K),XB(i)
      • Refutation
        • Q(f);XR(K)
  • Actual
    • S(J);
    • Threat
      • R(K)
    • Vars
      • Q(f);CHECK,N_GUARD::R(G)+B(F),XQ(f)
      • Q(f);CHECK,OGATE,P_SPINQ(f),XB(F)::R(G),XQ(f)
      • Q(f);N_GUARD::R(G)+B(F)
      • Q(f);N_GUARD::R(K)
      • S(a);N_GUARD,SBLOCK::QAB1(A)
      • S(a);OGATE::P(C),XS(a)
      • S(h);N_GUARD::S(M),XP(e)
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