MESON Chess Problem Database

Problem Display
PID: 29645 (8/8/4p2Q/2K1p3/4k3/2p2r2/5RRp/7B w - - 0 1)

Wurzburg, Otto

2nd HM., Good Companions (July), 1921

8/8/4p2Q/2K1p3/4k3/2p2r2/5RRp/7B

#2

5 + 6

3132 The Good Companion Two-Mover 1922
3325 Wurzburg Artistry 1974
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Rg4#
    • 1...Re3
      • 2.Qg6#
      • 2.Qh7#
    • 1...Rg3
      • 2.Rxg3#
    • 1...Rh3
      • 2.Rg3#
  • Tries
    • 1.Rg4+?
      • 1...Kf5
        • 2.Qg5#
        • 2.Qg6#
      • 1...Kd3!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qxf3#
      • 1...Kd3
        • 2.Qxf3#
      • 1...Ke3
        • 2.Qxf3#
      • 1...Kf4
        • 2.Qxf3#
      • 1...Rxf2
        • 2.Rxf2#
      • 1...Rxh3
        • 2.Rg3#
      • 1...Rd3
        • 2.Rg4#
      • 1...Re3
        • 2.Qh7#
      • 1...Rg3
        • 2.Rxg3#
      • 1...Rf4
        • 2.Re2#
      • 1...Rf5
        • 2.Rg4#
      • 1...Rf6
        • 2.Rg4#
      • 1...Rf7
        • 2.Rg4#
      • 1...Rf8
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::B(A)+R(C),DCHECK
    • R(c);OGATEB::B(A)+R(C),XR(c)
    • R(c);OGATEB::B(A)+R(C)
  • Tries
    • Try
      • R(C);CHECK,P_PINR(c)
      • Refutation
        • K(d);N_SPINR(c),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XR(c)
    • Vars
      • K(d);P_SPINR(c),S_FLIGHT::QAR2(E),XR(c)
      • K(d);P-FLIGHT,P_SPINR(c)::QAR1(E),XR(c)
      • R(c);OGATE,XR(B)::B(A)+R(C),XR(c)
      • R(c);OGATEB,XQ(E)::B(A)+R(C)
      • R(c);::B(A)+R(C),DCHECK
      • R(c);N_GUARD,SBLOCK::QAB(E)
      • R(c);OGATEB::B(A)+R(C),XR(c)
      • R(c);N_GUARD,SBLOCK::R(B)
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