MESON Chess Problem Database

Problem Display
PID: 99660 (8/rP6/8/1k1P2K1/8/2Q1B3/8/8 w - - 0 1)

Dehler, Otto Georg Edgar

Magyar Sakkvilag, 1903

8/rP6/8/1k1P2K1/8/2Q1B3/8/8

#2

5 + 2

6490 yacpdb 2009
15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4+?
      • 1...Ka6
        • 2.Qb6#
        • 2.b8S#
      • 1...Kxb4!
    • 1.Qb3+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Ka5!
    • 1.Qc5+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Ka4!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Bd2#
      • 1...Kb4!
    • 1.b8Q+?
      • 1...Ka4
        • 2.Qa1#
        • 2.Qcb4#
        • 2.Qbb3#
        • 2.Qbb4#
      • 1...Ka6
        • 2.Qa1#
        • 2.Qa3#
        • 2.Qb6#
      • 1...Rb7!
    • 1.b8R+?
      • 1...Ka4
        • 2.Qa1#
        • 2.Qb4#
      • 1...Ka6
        • 2.Rb6#
        • 2.Qa1#
        • 2.Qa3#
      • 1...Rb7!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Qc6#
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka6
        • 2.Qc6#
      • 1...Kb6
        • 2.Qc6#
      • 1...Ra6
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(E);CHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • P(E);CHECK
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • B(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);P-FLIGHT::QAR1(A)
      • R(b);SBLOCK::QAR1(A)
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