MESON Chess Problem Database

Problem Display
PID: 235134 (4R3/7B/1nN2p2/8/4P3/R1bnk3/4N1P1/1b1Q1K2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 2017

4R3/7B/1nN2p2/8/4P3/R1bnk3/4N1P1/1b1Q1K2

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qc1#
    • 1...Bd4
      • 2.Qc1#
    • 1...Be5
      • 2.Qc1#
    • 1...Sc1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sb2
      • 2.Qd4#
    • 1...Sf2
      • 2.Qd4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sf4
      • 2.Qd4#
    • 1...Sc5
      • 2.Qd4#
    • 1...Se5
      • 2.Qd4#
  • Tries
    • 1.Scd4?
      • threat
        • 2.Sf5#
      • 1...Bxd4
        • 2.Qc1#
      • 1...f5
        • 2.Sxf5#
      • 1...Se5!
    • 1.Qc1+?
      • 1...Bd2
        • 2.Qc5#
      • 1...Sxc1!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sf5#
      • 1...f5
        • 2.Sxf5#
      • 1...Be5
        • 2.Qc1#
      • 1...Se5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • B(b);N_GUARD,P_SPINS(c)::QAB(A)
    • S(c);OGATE,P_SPINB(b)::QAB1(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • B(b);N_GUARD,P_SPINS(c),XS(G)::QAB(A)
        • P(f);::S(G),XP(f)
      • Refutation
        • S(c);P_SPINB(b)
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),P_SPINS(c),SBLOCK::QAB(A)
      • Refutation
        • S(c);P_SPINB(b),XQ(A)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(f);::S(G),XP(f)
      • B(b);N_GUARD,P_SPINS(c)::QAB(A)
      • S(c);OGATE,P_SPINB(b)::QAB1(A)
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