MESON Chess Problem Database

Problem Display
PID: 230690 (3rQ1rk/3R2p1/4NN1p/qp6/p1P3Kn/8/8/8 w - - 0 1)

Uhlmann, AO

The Globe, 1911

(First published on Sat Mar 25 1911)

3rQ1rk/3R2p1/4NN1p/qp6/p1P3Kn/8/8/8

#2

6 + 9

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Qxg8#
    • 1...h5+
      • 2.Qxh5#
    • 1...g5
      • 2.Rh7#
    • 1...g6
      • 2.Rh7#
  • Tries
    • 1.Rxd8?
      • threat
        • 2.Qxg8#
      • 1...h5+
        • 2.Qxh5#
      • 1...Rxe8
        • 2.Rxe8#
      • 1...Rf8
        • 2.Qxf8#
      • 1...Qxd8!
    • 1.Qg6?
      • threat
        • 2.Qh7#
      • 1...h5+
        • 2.Qxh5#
      • 1...gxf6
        • 2.Rh7#
      • 1...Sxg6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf7#
      • 1...h5+
        • 2.Qxh5#
      • 1...Rxd7
        • 2.Qxg8#
      • 1...hxg5
        • 2.Qh5#
      • 1...gxf6
        • 2.Rh7#
      • 1...g6
        • 2.Rh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD,XR(E)::QAR1(F),XR(h)
    • P(e);CHECK,OGATEB::QAR(F),XP(e)
    • P(f);OGATE::R1(E)
  • Tries
    • Try
      • R(E);XR(g)
      • Threat
        • QAR1(F),XR(h)
      • Vars
        • P(e);CHECK,OGATEB::QAR(F),XP(e)
        • R(h);OGATE,XQ(F)::R(E),XR(h)
        • R(h);OGATEB::QAR2(F),XR(h)
      • Refutation
        • Q(c);XR(E)
    • Try
      • Q(F);N_PINR(h)
      • Threat
        • QAR1(F)
      • Vars
        • P(e);CHECK,OGATEB::QAR(F),XP(e)
        • P(f);OGATE,P_PINQ(F),XS(D)::R1(E)
      • Refutation
        • S(b);XQ(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • P(e);CHECK,OGATEB::QAR(F),XP(e)
      • R(g);N_GUARD,XR(E)::QAR1(F),XR(h)
      • P(e);OGATEB,XS(C)::QAR(F)
      • P(f);OGATE,P_PINS(C),XS(D)::R1(E)
      • P(f);OGATE::R1(E)
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