MESON Chess Problem Database

Problem Display
PID: 53443 (7q/bN1p4/3r4/p6r/K1kn1R2/7p/8/n2RQ1BB w - - 0 1)

Strerath, Otto

Schach, 1950

7q/bN1p4/3r4/p6r/K1kn1R2/7p/8/n2RQ1BB

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sxd6#
    • 1...Bc5
      • 2.Sxa5#
  • Tries
    • 1.Sxa5+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Rxa5+!
    • 1.Rc1+?
      • 1...Kd3
        • 2.Be4#
        • 2.Rc3#
        • 2.Qd1#
        • 2.Qe3#
      • 1...Sc2!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Rc3#
      • 1...Kd5
        • 2.Rc3#
      • 1...Sxf3
        • 2.Sxd6#
      • 1...Sdc2
        • 2.Sxd6#
      • 1...Se2
        • 2.Sxd6#
      • 1...Sdb3
        • 2.Sxd6#
      • 1...Sb5
        • 2.Sxa5#
      • 1...Sf5
        • 2.Sxa5#
      • 1...Sc6
        • 2.Sxd6#
      • 1...Se6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK::S(G),XR(g)
    • B(h);SBLOCK,S_CUTR(f)::S(G),XP(e)
  • Tries
    • Try
      • S(G);CHECK,XP(e)
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • R(f);CHECK,XS(G)
    • Try
      • R(A);CHECK
      • Refutation
        • S(a);N_SPINS(d),P_SPINS(a)
  • Actual
    • R(F);N_PINS(d)
    • Threat
      • R1(F)
    • Vars
      • K(c);P_SPINS(d),S_FLIGHT::B(D)+R(F)
      • S(d);XR(F)::S(G),XR(g)
      • S(d);::S(G),XR(g)
      • S(d);S_CUTR(f)::S(G),XP(e)
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Developed and maintained by Brian Stephenson.
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