MESON Chess Problem Database

Problem Display
PID: 195059 (5Q2/8/8/8/8/5R1r/7b/5K1k w - - 0 1)

Wurzburg, Otto

Pittsburgh Gazette-Times, 1918

5Q2/8/8/8/8/5R1r/7b/5K1k

#2

3 + 3

5454 Near Snap 2018
3713 Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3+
      • 2.Qxf3#
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rg3#
        • 2.Rxh3#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Bg1
        • 2.Rxh3#
      • 1...Bg3
        • 2.Rf2#
      • 1...Bf4
        • 2.Rxh3#
      • 1...Be5
        • 2.Rxh3#
      • 1...Bd6
        • 2.Rxh3#
      • 1...Bc7
        • 2.Rxh3#
      • 1...Bb8
        • 2.Rxh3#
      • 1...Rg3
        • 2.Rxg3#
      • 1...Rh4
        • 2.Rf4#
      • 1...Rh5
        • 2.Rf5#
      • 1...Rh6
        • 2.Rf6#
      • 1...Rh7
        • 2.Rf7#
      • 1...Rh8
        • 2.Rf8#

Anticipated by 184801(1908)

This anticipates 157484(1965), 178096(1965), 172205(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE,XR(B)::QAB(C),XR(c)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XR(B)::QAB(C),XR(c)
      • B(b);::QAB(C)+R(B),DCHECK,XR(c)
      • B(b);S_CUTR(c)::QAB(C)+R(B)
      • R(c);::QAB(C)+R(B),XR(c)
      • R(c);N_GUARD::QAB(C)+R(B)
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