MESON Chess Problem Database

Problem Display
PID: 225897 (6K1/2Q5/8/2Np1pP1/2Nk4/1pR1p3/1P6/2n1rqn1 w - - 0 1)

Lech, Anton

Praca, 1953

6K1/2Q5/8/2Np1pP1/2Nk4/1pR1p3/1P6/2n1rqn1

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Qd6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Se6#
        • 2.Qg7#
      • 1...Qc4
        • 2.Se6#
      • 1...Qa6
        • 2.Qf4#
      • 1...Qf4
        • 2.Se6#
        • 2.Qxf4#
      • 1...Sd3
        • 2.Sdxb3#
        • 2.Scxb3#
        • 2.Se6#
      • 1...Sf3
        • 2.Se6#
        • 2.Qf4#
      • 1...exd2!
    • 1.Sa3?
      • threat
        • 2.Qg7#
      • 1...Qa6
        • 2.Qf4#
      • 1...Qf4
        • 2.Sb5#
        • 2.Qxf4#
      • 1...Sd3
        • 2.Sb5#
      • 1...Sf3
        • 2.Qf4#
      • 1...Qc4!
    • 1.Sa5?
      • threat
        • 2.Sc6#
        • 2.Qg7#
      • 1...Qb5
        • 2.Qf4#
        • 2.Qg7#
      • 1...Qa6
        • 2.Qf4#
      • 1...Qf4
        • 2.Sc6#
        • 2.Qxf4#
      • 1...Sd3
        • 2.Saxb3#
        • 2.Sc6#
      • 1...Sf3
        • 2.Sc6#
        • 2.Qf4#
      • 1...Qc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qg7#
      • 1...Ke5
        • 2.Sb5#
      • 1...Qc4
        • 2.Sxf5#
      • 1...Qf4
        • 2.Sb5#
      • 1...Sd3
        • 2.Sb5#
      • 1...Sf3
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(h);OGATEB,XS(C)::QAR2(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::S(D)
        • Q(c);N_GUARD::QAR2(F)
      • Refutation
        • P(f);XS(C)
    • Try
      • S(C);
      • Threat
        • QAB(F)
      • Vars
        • Q(c);N_GUARD::QAR2(F)
        • S(a);S_CUTQ(c)::S(C)
        • S(d);S_CUTQ(c)::QAR2(F)
      • Refutation
        • Q(c);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD::QAR2(F)
      • Refutation
        • Q(c);
  • Actual
    • S(C);
    • Threat
      • QAB(F)
    • Vars
      • K(g);S_FLIGHT::QAB(F)+S(C)
      • Q(c);N_GUARD::S(C),XP(i)
      • Q(c);N_GUARD::S(C)
      • S(a);S_CUTQ(c)::S(C)
      • S(d);S_CUTQ(c)::S(C),XP(i)
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