MESON Chess Problem Database

Problem Display
PID: 193490 (4R2n/5p2/p5p1/5kp1/4Nr1p/7P/5P2/K4Q2 w - - 0 1)

Leopold, Dr Rudolf L

Deutsche Schachzeitung, 1915

4R2n/5p2/p5p1/5kp1/4Nr1p/7P/5P2/K4Q2

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Qxf2#
    • 1...a5
      • 2.Qb5#
    • 1...f6
      • 2.Sd6#
  • Tries
    • 1.Qxa6?
      • threat
        • 2.Qb5#
        • 2.Qc8#
        • 2.Qa5#
        • 2.Qf6#
      • 1...Rxf2
        • 2.Qf6#
      • 1...Rf3
        • 2.Qf6#
      • 1...Rg4
        • 2.Qf6#
      • 1...f6
        • 2.Sd6#
        • 2.Qb5#
        • 2.Qc8#
        • 2.Qa5#
        • 2.Qe6#
        • 2.Qxf6#
      • 1...Rxe4!
    • 1.Qd1?
      • threat
        • 2.Qd5#
        • 2.Qd7#
      • 1...Rxf2
        • 2.Qg4#
      • 1...Rf3
        • 2.Qxf3#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rxe4!
  • Keys
    • 1.f3!
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Rxe4
        • 2.fxe4#
      • 1...Rg4
        • 2.fxg4#
      • 1...g4
        • 2.fxg4#
      • 1...a5
        • 2.Qb5#
      • 1...f6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(C)::QAR(B),XR(a)
    • P(e);N_GUARD::QAR(B)
    • P(g);SBLOCK::S(E)
  • Tries
    • Try
      • Q(B);XP(e)
      • Threat
        • DUALS(4)
      • Vars
        • R(a);XP(C)::QAR1(B)
        • R(a);::QAR1(B)
      • Refutation
        • R(a);XS(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,XP(C)::QAB1(B)
        • R(a);OGATEB::QAR2(B),XR(a)
        • R(a);N_GUARD::QAB1(B),XR(a)
      • Refutation
        • R(a);XS(E)
  • Actual
    • P(C);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(C)::QAR2(B),XR(a)
      • R(a);OGATE,XS(E)::QAR(B)+P(C)DCHECK,XR(a)
      • R(a);OGATE::QAR(B)+P(C)DCHECK,XR(a)
      • P(d);OGATE::P(C),XP(d)
      • P(e);N_GUARD::QAR(B)
      • P(g);SBLOCK::S(E)
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Developed and maintained by Brian Stephenson.
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