MESON Chess Problem Database

Problem Display
PID: 240205 (K7/p5p1/3Q4/3p4/2Pk4/n7/1N1PnN1p/2r4q w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problem-Forum, 2014

K7/p5p1/3Q4/3p4/2Pk4/n7/1N1PnN1p/2r4q

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxd5#
    • 1...Qe1
      • 2.Qxd5#
    • 1...Qf1
      • 2.Qxd5#
    • 1...Qg1
      • 2.Qxd5#
  • Tries
    • 1.Sfd3?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qxd5#
      • 1...Qe4
        • 2.Qc5#
      • 1...Sxc4!
    • 1.Qf6+?
      • 1...Kc5
        • 2.Sfd3#
      • 1...gxf6!
  • Keys
    • 1.Sbd3!
      • threat
        • 2.Qc5#
      • 1...Kxc4
        • 2.Qb4#
      • 1...Rxc4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::QAR1(E),XP(g)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E)
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(E),XP(g)
        • Q(b);SBLOCK::QAB1(E)
      • Refutation
        • S(e);XP(D)
    • Try
      • Q(E);CHECK,N_PINP(g)
      • Vars
        • K(f);S_FLIGHT::S(C)
      • Refutation
        • P(i);XQ(E)
  • Actual
    • S(A);
    • Threat
      • QAB1(E)
    • Vars
      • K(f);N_SPINP(g),OGATEB,P-FLIGHT,XP(D)::QAR1(E)
      • R(a);SBLOCK,XP(D)::QAB1(E)
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