MESON Chess Problem Database

Problem Display
PID: 108509 (8/Q3B2K/5p2/p2pkp2/1r2P3/q1n3P1/3nNP2/2brN3 w - - 0 1)

Jurka, Eriks

Latvian Championship, 1951

8/Q3B2K/5p2/p2pkp2/1r2P3/q1n3P1/3nNP2/2brN3

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qe3#
  • Tries
    • 1.Sd3+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Ke6!
    • 1.Bd6+?
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qe7#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxd6!
    • 1.Qc7+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Ke6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Rxe4
        • 2.Sd3#
      • 1...Sdxe4
        • 2.Sf3#
      • 1...Sxe2
        • 2.Qxd5#
      • 1...Scxe4
        • 2.f4#
      • 1...dxe4
        • 2.Qd6#
      • 1...fxe4
        • 2.Bd6#
      • 1...f4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(i);OGATEB,P-FLIGHT,XP(E)::QAR1(F)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(i);P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • B(G);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(F)
      • Refutation
        • K(i);S_FLIGHT,XB(G)
    • Try
      • Q(F);CHECK
      • Vars
        • K(i);OGATE,P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • K(i);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XP(j)
    • Vars
      • K(i);P-FLIGHT,XP(E)::QAR2(F)
      • R(f);SBLOCK,XP(E)::S(A)
      • S(c);N_GUARD,SBLOCK,XP(E)::S(A)
      • S(e);N_GUARD,XS(B)::QAR1(F),XP(h)
      • S(e);SBLOCK,XP(E)::P(C)
      • P(h);SBLOCK,XP(E)::QAB1(F)
      • P(j);SBLOCK,XP(E)::B(G)
      • P(j);::QAR1(F)
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