MESON Chess Problem Database

Problem Display
PID: 149135 (8/4p3/p1NpP2p/Pp5Q/1K2k1p1/6R1/5P2/8 w - - 0 1)

Dehler, Otto Georg Edgar

Die Schwalbe, 1928

8/4p3/p1NpP2p/Pp5Q/1K2k1p1/6R1/5P2/8

#2

7 + 7

15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxg4#
    • 1...d5
      • 2.Qxg4#
      • 2.Qe5#
  • Tries
    • 1.Ka3?
      • 1...Kf4
        • 2.Qxg4#
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...b4+!
    • 1.Kb3?
      • 1...Kf4
        • 2.Qxg4#
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...b4!
    • 1.Kc3?
      • 1...Kf4
        • 2.Qxg4#
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...b4+!
    • 1.Sxe7?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qf5#
      • 1...d5!
    • 1.Ra3?
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...g3
        • 2.Qf3#
      • 1...Kf4!
    • 1.Rb3?
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...g3
        • 2.Qf3#
      • 1...Kf4!
    • 1.Rc3?
      • 1...d5
        • 2.Qxg4#
        • 2.Qe5#
      • 1...g3
        • 2.Qf3#
      • 1...Kf4!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Qxg4#
      • 1...Kd5!
  • Keys
    • 1.f4!
      • 1...Kxf4
        • 2.Qxg4#
      • 1...gxf4 ep
        • 2.Qxf3#
      • 1...d5
        • 2.Qe5#

This is a version of 149144

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(E),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • P(c);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • P(c);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • P(c);CHECK
    • Try
      • S(F);XP(g)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(e);
    • Try
      • R(B);
      • Vars
        • P(b);OGATE::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • P(b);OGATE::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • P(b);OGATE::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(A);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(A)::QAR1(E),XP(b)
      • P(b);EP,OGATE,XP(A)::QAB1(E),XP(b)
      • P(e);N_GUARD::QAR1(E)
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