MESON Chess Problem Database

Problem Display
PID: 63782 (1QRbq1B1/R6r/2PN4/1bkN4/2Pn3p/3PP3/8/1K6 w - - 0 1)

Lider, Valentin Viktorovich

2nd Prize, The Problemist, 1978

1QRbq1B1/R6r/2PN4/1bkN4/2Pn3p/3PP3/8/1K6

#2

11 + 7

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Se4#
    • 1...Qxc6
      • 2.Se4#
    • 1...Qd7
      • 2.Se4#
    • 1...Qf7
      • 2.Se4#
    • 1...Qe4
      • 2.Sxe4#
    • 1...Qf8
      • 2.Se4#
    • 1...Qxg8
      • 2.Se4#
    • 1...Rh5
      • 2.Sb7#
    • 1...Rh6
      • 2.Sb7#
    • 1...Rb7
      • 2.Sxb7#
    • 1...Rh8
      • 2.Sb7#
    • 1...Ba4
      • 2.Qb4#
    • 1...Bxc4
      • 2.Qb4#
    • 1...Ba6
      • 2.Qb4#
    • 1...Bxc6
      • 2.Qb4#
    • 1...Be7
      • 2.Se4#
      • 2.Sb7#
    • 1...Sxc6
      • 2.d4#
    • 1...Se6
      • 2.Se4#
  • Keys
    • 1.c7!
      • threat
        • 2.Qb6#
      • 1...Kc6
        • 2.cxd8S#
      • 1...Kxd6
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Qc6
        • 2.Se4#
      • 1...Bc6
        • 2.Qb4#
      • 1...Sc6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(g);N_GUARD::S(G)
    • Q(g);N_GUARD,P_SPINQ(g),XP(F)::S(G)
    • Q(g);N_GUARD,P_PINP(B)::S(G),XQ(g)
    • Q(g);N_GUARD,XB(K)::S(G)
    • R(e);N_GUARD::S(G)
    • R(e);N_GUARD::S(G),XR(e)
    • B(c);OGATE::QAB1(I)
    • B(c);OGATE,XP(D)::QAB1(I)
    • B(c);OGATE,P_SPINB(c),XP(F)::QAB1(I)
    • S(a);OGATE,P_SPINS(a),XP(F)::P(B)
    • S(a);S_CUTQ(g)::S(G)
  • Actual
    • P(F);
    • Threat
      • QAB1(I)
    • Vars
      • K(d);P-FLIGHT::PXB(f)=S
      • K(d);S_FLIGHT,XS(G)::PXB(f)=Q
      • Q(g);N_GUARD,SBLOCK::S(G)
      • B(c);OGATE,SBLOCK::QAB1(I)
      • S(a);SBLOCK::S(G)
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