MESON Chess Problem Database

Problem Display
PID: 157318 (8/8/8/8/8/6K1/2Qpk1N1/7B w - - 0 1)

Speckmann, Werner

Schach-Echo, 1940

8/8/8/8/8/6K1/2Qpk1N1/7B

#2

4 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qd1#
  • Tries
    • 1.Sf4+?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke3
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qc3#
        • 2.Qc5#
      • 1...Ke1!
    • 1.Sh4?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke3
        • 2.Qe4#
      • 1...Ke1!
    • 1.Qxd2+?
      • 1...Kf1
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Kxd2!
  • Keys
    • 1.Se3!
      • 1...Ke1
        • 2.Qd1#
      • 1...Kxe3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR2(B)
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(B);CHECK,XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XS(C)::QAR1(B)
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