MESON Chess Problem Database

Problem Display
PID: 119138 (3r3b/1B2N3/7R/4k3/4p3/8/4nQ1K/8 w - - 0 1)

Wurzburg, Otto

Orillia Packet, 1896

3r3b/1B2N3/7R/4k3/4p3/8/4nQ1K/8

#2

5 + 5

6490 yacpdb 2009
3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qf5#
    • 1...Rd5
      • 2.Sc6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Sd4
      • 2.Qg3#
    • 1...e3
      • 2.Qxe3#
  • Keys
    • 1.Bd5!
      • threat
        • 2.Re6#
      • 1...Rxd5
        • 2.Sc6#
      • 1...Bf6
        • 2.Qxf6#
      • 1...e3
        • 2.Qxe3#
      • 1...Rd6
        • 2.Rh5#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sf4
        • 2.Qb2#

This anticipates 6742(1933)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::QAR1(A)
    • R(d);SBLOCK::S(E)
    • B(e);N_GUARD::QAB1(A),XB(e)
    • S(a);N_GUARD,SBLOCK::QAB(A)
    • P(b);OGATEB::QAR2(A),XP(b)
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • R(d);SBLOCK,XB(D)::S(E)
      • B(e);N_GUARD::QAB1(A),XB(e)
      • P(b);OGATEB::QAR2(A),XP(b)
      • R(d);SBLOCK::R(C)
      • S(a);N_GUARD,SBLOCK::QAB(A)
      • S(a);OGATE,SBLOCK::QAB(A)
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