MESON Chess Problem Database

Problem Display
PID: 203292 (7b/8/1p1Q4/1p6/2k5/r1Pp1K2/6R1/1B6 w - - 0 1)

Hagemann, Fritz

2nd Prize, Deutsche Schachblatter, 1924

7b/8/1p1Q4/1p6/2k5/r1Pp1K2/6R1/1B6

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Qb4#
    • 1...Rb3
      • 2.Qc6#
  • Tries
    • 1.Bxd3+?
      • 1...Kb3
        • 2.Qb4#
      • 1...Kxc3!
    • 1.Rg4+?
      • 1...Kb3
        • 2.Qb4#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Bd4!
    • 1.Qd4+?
      • 1...Kb3
        • 2.Qb4#
      • 1...Bxd4!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qc6#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Rxc3
        • 2.Rb4#
      • 1...Bxc3
        • 2.Bxd3#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(c);S_FLIGHT::QAR1(E)
    • R(a);SBLOCK::QAR2(E)
  • Tries
    • Try
      • B(A);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(E)
      • Refutation
        • K(c);P-FLIGHT,XP(C)
    • Try
      • R(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(E)
        • K(c);P-FLIGHT,XP(C)::QAB1(E)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • B(f);XQ(E)
  • Actual
    • R(B);
    • Threat
      • QAR2(E)
    • Vars
      • K(c);P-FLIGHT,XP(C)::QAB1(E)
      • R(a);SBLOCK,XP(C)::R1(B)
      • B(f);SBLOCK,XP(C)::B(A),XP(b)
      • B(f);N_GUARD::QAR1(E),XB(f)
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