MESON Chess Problem Database

Problem Display
PID: 217749 (5K2/2P3p1/4k3/R2N2P1/1nQ2Rr1/B6B/8/2r2b2 w - - 0 1)

Martin, Ernst Otto

Deutsche Schachzeitung, 1943

5K2/2P3p1/4k3/R2N2P1/1nQ2Rr1/B6B/8/2r2b2

#2

9 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qxd5#
  • Tries
    • 1.Rf6+?
      • 1...Ke5
        • 2.Sxb4#
      • 1...Kd7
        • 2.Sb6#
        • 2.Bxg4#
        • 2.Qxg4#
        • 2.c8Q#
      • 1...gxf6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sf4#
      • 1...Ke5
        • 2.Sxb4#
      • 1...Kf5
        • 2.Se7#
      • 1...Kd6
        • 2.Sf4#
      • 1...Kd7
        • 2.Sb6#
      • 1...Sxd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,P_SPINS(c),XS(F)::QAB1(C),XS(c)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(e);N_SPINR(d),P-FLIGHT::R(E)+S(F),XS(c)
      • Refutation
        • P(f);XR(D)
  • Actual
    • R(D);
    • Threat
      • QAB(C)+S(F),DCHECK
    • Vars
      • K(e);N_SPINR(d),P-FLIGHT::R(E)+S(F),XS(c)
      • K(e);S_FLIGHT::R(E)+S(F),DCHECK
      • K(e);N_SPINR(d),P-FLIGHT,P_SPINS(c)::R(D)+S(F)
      • K(e);S_FLIGHT::R(D)+S(F),DCHECK
      • S(c);OGATE,P_SPINS(c),XS(F)::QAB1(C),XS(c)
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