MESON Chess Problem Database

Problem Display
PID: 243519 (6K1/8/2b1Q3/1Nb5/p3PN2/4k1B1/1R2P2p/7q w - - 0 1)

Burda, Josef

Szachy, 1986

6K1/8/2b1Q3/1Nb5/p3PN2/4k1B1/1R2P2p/7q

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Sxg2#
    • 1...Qxe4
      • 2.Sg2#
    • 1...Qa1
      • 2.Sg2#
    • 1...Qb1
      • 2.Sg2#
    • 1...Qc1
      • 2.Sg2#
    • 1...Qd1
      • 2.Sg2#
    • 1...Qe1
      • 2.Sg2#
    • 1...Bxe4
      • 2.Sd5#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Bd7
      • 2.Sd5#
    • 1...Be8
      • 2.Sd5#
  • Tries
    • 1.Bf2+?
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kxf2!
    • 1.Qb3+?
      • 1...Kxe4
        • 2.Qe6#
      • 1...axb3!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd3#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Qxe4
        • 2.Qc1#
      • 1...Bxe4
        • 2.Qxc5#
      • 1...Bxb5
        • 2.Sd5#
      • 1...Qb1
        • 2.Sg2#
      • 1...Qd1
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,P_PINB(C)::S(E),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(D)::S(E)
    • Q(a);N_GUARD::S(E)
    • B(f);N_GUARD,P_SPINB(f),XP(D)::S(E)
    • B(f);N_GUARD,P_PINQ(G)::S(E),XB(f)
    • B(f);N_GUARD::S(E)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT,XB(C)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(D)::QAR2(G)
      • Refutation
        • P(d);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • B(f);CHECK,N_GUARD::S(E),XB(f)
      • Q(a);N_GUARD,SBLOCK,XP(D)::QAB(G)
      • B(f);SBLOCK,XP(D)::QAB(G),XB(e)
      • B(f);N_GUARD,XS(F)::S(E)
      • Q(a);N_GUARD::S(E)
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