MESON Chess Problem Database

Problem Display
PID: 101846 (1qRb1N2/1PpP4/P1kBPn1Q/1R6/K2pN3/8/3n4/7B w - - 0 1)

Lider, Valentin Viktorovich

diagrammes, 1976

1qRb1N2/1PpP4/P1kBPn1Q/1R6/K2pN3/8/3n4/7B

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Sf1
      • 2.Qc1#
    • 1...Sf3
      • 2.Qc1#
    • 1...Se8
      • 2.dxe8Q#
      • 2.dxe8B#
  • Keys
    • 1.Bxc7!
      • threat
        • 2.Rc5#
      • 1...Qxc7
        • 2.b8S#
      • 1...Bxc7
        • 2.d8S#
      • 1...Sdxe4
        • 2.Qc1#
      • 1...Sfxe4
        • 2.e7#
      • 1...Sxd7
        • 2.Sxd2#
      • 1...Qa7
        • 2.Bxd8#
      • 1...Be7
        • 2.Bxb8#
      • 1...Sb3
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE,P_PINP(E)::PXQ(f)=Q
    • S(a);OGATE::QAR(H)
    • S(d);OGATE::PXS(d)=Q
  • Actual
    • B(F);XP(e)
    • Threat
      • R1(D)
    • Vars
      • Q(f);OGATE,P_SPINQ(f),XB(F)::P=S
      • B(g);OGATE,P_SPINB(g),XB(F)::P=S
      • S(a);OGATE,P_SPINS(a),XS(C)::QAR(H)
      • S(d);P_SPINS(d),XS(C)::QAR(H)+P(G)
      • S(d);N_GUARD,XP(J)::B(A)+S(C),XS(a)
      • Q(f);N_GUARD,P_PINP(E)::R(K)+B(F),XB(g)
      • B(g);N_GUARD::R(K)+B(F),XQ(f)
      • S(a);N_GUARD::B(A)+S(C),XS(d)
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Developed and maintained by Brian Stephenson.
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