MESON Chess Problem Database

Problem Display
PID: 176327 (5K2/8/2B5/3N4/4k1p1/2P2NP1/6Q1/8 w - - 0 1)

Speckmann, Werner

Schach-Echo, 1969

5K2/8/2B5/3N4/4k1p1/2P2NP1/6Q1/8

#2

7 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Se5#
  • Tries
    • 1.Ke7?
      • 1...Kd3
        • 2.Se5#
      • 1...Kf5
        • 2.Qc2#
      • 1...gxf3!
    • 1.Kf7?
      • 1...Kd3
        • 2.Se5#
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
        • 2.Qc2#
      • 1...gxf3!
    • 1.Sd4+?
      • 1...Kd3
        • 2.Bb5#
        • 2.Qe2#
      • 1...Ke5!
    • 1.Sh4+?
      • 1...Kd3
        • 2.Bb5#
      • 1...Ke5!
    • 1.Sb4+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kf5!
    • 1.Sf4+?
      • 1...Ke3
        • 2.Qg1#
        • 2.Qd2#
        • 2.Qe2#
      • 1...Kf5!
    • 1.Sb6+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Ke3
        • 2.Qd2#
      • 1...Kf5!
    • 1.Se7+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kd3!
  • Keys
    • 1.Se3+!
      • 1...Kd3
        • 2.Qd2#
      • 1...Kxe3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(C)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::S(C)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT,XS(E)::QAB1(A)
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