MESON Chess Problem Database

Problem Display
PID: 178630 (6n1/2Q5/1P1Np1pP/4k1r1/K4n1q/2P2R2/B2N4/7b w - - 0 1)

Volkmann, Albert

1st Prize, Caissa, 1951/II

6n1/2Q5/1P1Np1pP/4k1r1/K4n1q/2P2R2/B2N4/7b

#2

9 + 8

78 Bulletin Ouvrier des Echecs 1952

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qg7#
    • 1...Rf5
      • 2.S6e4#
      • 2.Se8#
    • 1...Se2+
      • 2.S6e4#
    • 1...Sg2+
      • 2.S6e4#
    • 1...Sd3+
      • 2.S6e4#
    • 1...Sh3+
      • 2.S6e4#
    • 1...Sd5+
      • 2.S6c4#
    • 1...Sh5+
      • 2.S6e4#
  • Tries
    • 1.S2c4+?
      • 1...Kf6
        • 2.Qf7#
        • 2.Qg7#
      • 1...Kd5!
    • 1.Re3+?
      • 1...Kf6
        • 2.Qf7#
        • 2.Qg7#
      • 1...Be4!
    • 1.Qg7+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Sf6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd4#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Qxe6#
      • 1...Qf2
        • 2.Qxf4#
      • 1...Se2
        • 2.Sf7#
      • 1...Sg2
        • 2.Sf7#
      • 1...Sd3
        • 2.Sf7#
      • 1...Sh3
        • 2.Sf7#
      • 1...Sd5
        • 2.Sf7#
      • 1...Sh5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINS(b),S_FLIGHT::QAB1(I)
    • S(b);CHECK::QAB(I)+S(G)
    • S(b);CHECK,SBLOCK::QAB(I)+S(G),DCHECK
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
      • K(d);P_SPINS(b),S_FLIGHT::QAR1(I),XP(f)
      • Q(c);N_GUARD::QAB1(I),XS(b)
      • S(b);P_PINQ(I)::S(G)
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