MESON Chess Problem Database

Problem Display
PID: 12289 (2KR4/p1Q5/n1P5/pp1N4/2k4r/1N4p1/p1P3Pr/1n6 w - - 0 1)

Lehen, Ludovit

1st Prize, Pravda (Bratislava), 1977-1978

(First published on Fri Nov 3 1978)

2KR4/p1Q5/n1P5/pp1N4/2k4r/1N4p1/p1P3Pr/1n6

#2

8 + 10

5865 Czech Album (1976-1978) 1983
3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Qf4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rh5
      • 2.Qf4#
    • 1...Rh6
      • 2.Qf4#
    • 1...Rh7
      • 2.Qf4#
    • 1...Rh8
      • 2.Qf4#
  • Tries
    • 1.Sxa5+?
      • 1...Kc5
        • 2.Qxa7#
      • 1...Kd4!
    • 1.Se3+?
      • 1...Kb4
        • 2.Qxa5#
      • 1...Kc3!
    • 1.Qxa5?
      • threat
        • 2.Se3#
      • 1...Sb4
        • 2.Qxb4#
      • 1...b4
        • 2.Qxa6#
      • 1...Re4!
    • 1.Qe5?
      • threat
        • 2.Qe2#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4
        • 2.Se3#
      • 1...Sc5
        • 2.Sxa5#
      • 1...Rxg2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe2#
      • 1...Rxg2
        • 2.Qxh4#
      • 1...Rd4
        • 2.Sxa5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Se3#
      • 1...Sb4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(f);N_GUARD::QAR(F)
    • R(f);N_GUARD::QAR(F),XR(f)
    • R(f);N_GUARD,P_PINR(H)::QAR(F)
  • Tries
    • Try
      • S(C);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT::QAB(F),XP(j)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(F),XP(g)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(F);XP(g)
      • Threat
        • S(D)
      • Vars
        • S(i);N_GUARD::QAR1(F),XS(i)
        • P(h);OGATEB::QAB(F),XS(i)
      • Refutation
        • R(f);
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • R(f);N_GUARD::QAR1(F),XR(f)
        • R(f);N_GUARD::QAR2(F),XR(f)
        • S(a);N_GUARD::QAR1(F),XS(a)
        • S(i);SBLOCK::S(D)
        • S(i);SBLOCK::S(C),XP(g)
      • Refutation
        • R(c);XP(B)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(c);N_GUARD,XP(B)::QAR(F),XR(f)
      • R(f);SBLOCK::S(C),XP(g)
      • R(f);N_GUARD::QAR2(F),XR(f)
      • S(a);SBLOCK::S(D)
      • S(i);N_GUARD::QAR1(F)
      • S(i);N_GUARD::QAR1(F),XS(i)
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