MESON Chess Problem Database

Problem Display
PID: 199283 (3q4/R2p2Q1/3kP3/NbNB3R/1Pp1P3/6b1/4n2B/7K w - - 0 1)

Heyl, Peter

Freie Presse, 2001

(First published on Thu Apr 12 2001)

3q4/R2p2Q1/3kP3/NbNB3R/1Pp1P3/6b1/4n2B/7K

#2

11 + 7

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Qf8#
    • 1...Qb6
      • 2.Qf8#
    • 1...Qc7
      • 2.Qf8#
    • 1...Qf8
      • 2.Qxf8#
    • 1...Be5
      • 2.Bxe5#
    • 1...Ba4
      • 2.Sxc4#
    • 1...Bc6
      • 2.Sxc4#
    • 1...Sc1
      • 2.Bxg3#
    • 1...Sg1
      • 2.Bxg3#
    • 1...Sc3
      • 2.Bxg3#
    • 1...Sd4
      • 2.Bxg3#
    • 1...dxe6
      • 2.Sab7#
      • 2.Scb7#
  • Tries
    • 1.Bxg3+?
      • 1...Sf4
        • 2.Bxf4#
      • 1...Sxg3+!
    • 1.Qf8+?
      • 1...Qe7
        • 2.Qb8#
      • 1...Qxf8!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Rd5#
      • 1...Qxa5
        • 2.Qxd7#
      • 1...Bxc6
        • 2.Sxc4#
      • 1...dxc6
        • 2.Sab7#
      • 1...dxe6
        • 2.Scb7#
      • 1...Qg5
        • 2.Rxd7#
      • 1...Be5
        • 2.Bxe5#
      • 1...Sc3
        • 2.Bxg3#
      • 1...Sf4
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,XS(E)::QAB(K)
    • Q(g);N_GUARD::QAB(K)
    • Q(g);N_GUARD::QAB(K),XQ(g)
    • B(b);OGATE::B(B),XB(b)
    • B(d);N_GUARD::S(E),XP(c)
    • S(a);N_GUARD::B(B),XB(b)
  • Tries
    • Try
      • B(B);CHECK,XB(b)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(B),XS(a)
      • Refutation
        • S(a);CHECK,XB(B)
    • Try
      • Q(K);CHECK
      • Vars
        • Q(g);OGATE,P_SPINQ(g),SBLOCK::QAB(K)
      • Refutation
        • Q(g);XQ(K)
  • Actual
    • B(G);
    • Threat
      • R1(H)
    • Vars
      • Q(g);N_GUARD,XS(E)::QAR1(K),XP(f)
      • B(d);N_GUARD,P_PINP(D),SBLOCK,XB(G)::S(E),XP(c)
      • P(f);SBLOCK,XB(G)::S(E)
      • P(f);SBLOCK,XP(I)::S(F)
      • Q(g);N_GUARD::R1(J),XP(f)
      • B(b);OGATE::B(B),XB(b)
      • S(a);N_GUARD::B(B),XB(b)
      • S(a);N_SPINB(b),S_CUTB(b)::P(D)
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