MESON Chess Problem Database

Problem Display
PID: 66363 (8/8/4R1K1/2P2QN1/PPk4b/3Npp2/1Pp1q3/8 w - - 0 1)

Braune, Robert

10th HM., Leipziger Tageblatt und Handelszeitung, 1905

(First published on Sun Aug 27 1905)

8/8/4R1K1/2P2QN1/PPk4b/3Npp2/1Pp1q3/8

#2

9 + 6

5821 Robert Braune - Apotre de la Symetrie 1914
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe4#
  • Tries
    • 1.Re4+?
      • 1...Kxd3
        • 2.Qd7#
        • 2.Qd5#
      • 1...Kb3!
    • 1.Qg4+?
      • 1...Kxd3
        • 2.Rd6#
      • 1...Kd5
        • 2.Rd6#
        • 2.Qe4#
      • 1...Kb3!
    • 1.Qf4+?
      • 1...Kxd3
        • 2.Rd6#
      • 1...Kd5
        • 2.Rd6#
        • 2.Qe4#
      • 1...Kb3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Rd6#
      • 1...Qxd3+
        • 2.Re4#
      • 1...Kb3
        • 2.Ra6#
      • 1...Kxd3
        • 2.Rd6#
      • 1...Kd4
        • 2.Rd6#
      • 1...Kd5
        • 2.Rd6#

Anticipated by 157731(1901)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT::QAR1(F)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(B)::R(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(B)::R(H)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(H)
    • Vars
      • Q(b);CHECK,SBLOCK,XS(B)::QAB(F)+R(H),DCHECK
      • K(e);S_FLIGHT::QAB(F)+R(H)
      • K(e);S_FLIGHT,XS(B)::R(H)
      • K(e);P-FLIGHT::R(H)
      • K(e);S_FLIGHT::QAB(F)+R(H),DCHECK
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