MESON Chess Problem Database

Problem Display
PID: 158183 (3R3B/Kb6/4p1r1/pPkNN3/7R/P3npr1/7Q/5B2 w - - 0 1)

Bachl, Ernst

Die Schwalbe, 1951

3R3B/Kb6/4p1r1/pPkNN3/7R/P3npr1/7Q/5B2

#2

10 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sf5
      • 2.Qc2#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sa4#
        • 2.Sd3#
      • 1...Sxf1
        • 2.Sd3#
        • 2.Rc4#
      • 1...R3g4
        • 2.Sd7#
      • 1...Be4
        • 2.Sa4#
        • 2.Sxe4#
      • 1...Sc4
        • 2.Sd3#
        • 2.Rxc4#
      • 1...Sg4
        • 2.Sa4#
      • 1...a4
        • 2.Sxa4#
        • 2.Sd3#
      • 1...R6g4!
    • 1.Sd7+?
      • 1...Kxd5
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kd6!
    • 1.Rc4+?
      • 1...Kxb5
        • 2.Sc3#
        • 2.Sc7#
        • 2.Qb2#
        • 2.a4#
      • 1...Sxc4!
    • 1.Qc2+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxc2!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sd3#
      • 1...R6g4
        • 2.Sxe6#
      • 1...R3g4
        • 2.Sd7#
      • 1...Be4
        • 2.Sa6#
      • 1...Sg4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAR(B),XS(a)
    • S(a);N_GUARD::QAR(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(G)
        • S(a);::S(F)
      • Refutation
        • R(g);
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);P_SPINR(c),S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • S(a);XR(D)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(B),XS(a)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(F);
    • Threat
      • S(G)
    • Vars
      • R(g);N_GUARD::S(F),XP(f)
      • R(c);::S(G)
      • B(h);N_GUARD::S(F)
      • S(a);N_GUARD::QAR(B)
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