MESON Chess Problem Database

Problem Display
PID: 91991 (1q6/2r5/2R1n1Bb/4p3/1p1Prp2/1K1kPR2/3P4/3Q4 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Deutsche Schachblatter, 1938

1q6/2r5/2R1n1Bb/4p3/1p1Prp2/1K1kPR2/3P4/3Q4

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3
      • 2.dxe3#
    • 1...exd4
      • 2.exf4#
  • Tries
    • 1.Rc3+?
      • 1...Rxc3+
        • 2.dxc3#
      • 1...bxc3+!
  • Keys
    • 1.Rd6!
      • threat
        • 2.exf4#
      • 1...Rc3+
        • 2.dxc3#
      • 1...Sxd4+
        • 2.exd4#
      • 1...Sc5+
        • 2.dxc5#
      • 1...fxe3
        • 2.dxe3#
      • 1...Sg5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATE,P_SPINP(d),XP(D)::QAR(A)+P(B),XP(d)
    • P(e);SBLOCK,XP(F)::R(E)+P(D),XP(d)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • R(h);CHECK,OGATE,XR(G)::QAR(A)+P(B),XR(h)
      • Refutation
        • P(b);CHECK,XR(G)
  • Actual
    • R(G);
    • Threat
      • R(E)+P(D),XP(d)
    • Vars
      • R(h);CHECK,OGATE::QAR(A)+P(B),XR(h)
      • S(f);CHECK,OGATE,P_SPINS(f),XP(F)::R(E)+P(D),XS(f)
      • S(f);CHECK,OGATE::R(G)+P(F),XS(f)
      • P(d);OGATE,P_SPINP(d),XP(D)::QAR(A)+P(B),XP(d)
      • S(f);N_GUARD::R(G)+P(F),XP(e)
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