MESON Chess Problem Database

Problem Display
PID: 256969 (1b2R2B/Nr1p1Pr1/B1Pp4/P2k1N1n/QP1P4/p2p4/b5p1/4R1K1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Buletin Problemistic, 1995

1b2R2B/Nr1p1Pr1/B1Pp4/P2k1N1n/QP1P4/p2p4/b5p1/4R1K1

#2

13 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qxb5#
    • 1...Rxa7
      • 2.Qb5#
    • 1...Rc7
      • 2.Qb5#
    • 1...Rg3
      • 2.Se7#
    • 1...Rg4
      • 2.Se3#
      • 2.Se7#
    • 1...Rg5
      • 2.Se3#
      • 2.Se7#
    • 1...Rg6
      • 2.Se3#
      • 2.Se7#
    • 1...Rxf7
      • 2.Se3#
    • 1...Rh7
      • 2.Se3#
      • 2.Se7#
    • 1...Rg8
      • 2.Se3#
      • 2.Se7#
      • 2.fxg8Q#
      • 2.fxg8B#
    • 1...Bb1
      • 2.Qb3#
    • 1...Bb3
      • 2.Qxb3#
    • 1...dxc6
      • 2.Qxc6#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Sce7#
      • 1...Rxf7
        • 2.Se3#
      • 1...Rb5
        • 2.Qxb5#
      • 1...dxc6!
    • 1.R8e4?
      • threat
        • 2.Se7#
      • 1...dxc6
        • 2.Qxc6#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rxf7!
    • 1.b5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Rxf7
        • 2.Se3#
      • 1...dxc6
        • 2.Se3#
      • 1...Rg3
        • 2.Se7#
      • 1...Bc4!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sc3#
      • 1...Kc4
        • 2.Se3#
      • 1...Kxc6
        • 2.Se7#
      • 1...Rxb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::QAR2(C),XR(h)
    • R(h);N_GUARD,XS(J)::QAR2(C)
    • R(h);N_GUARD::QAR2(C)
    • R(j);::S(G)
    • R(j);XP(K)::S(G)
    • B(a);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAB(C),XB(a)
    • P(i);OGATE,XP(I)::QAB1(C),XP(i)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • R(j);XP(K)::S(G)
        • R(h);N_GUARD::QAR2(C),XR(h)
      • Refutation
        • P(i);XP(I)
    • Try
      • R(L);
      • Threat
        • S(G)
      • Vars
        • P(i);OGATE,XP(I)::QAB1(C),XP(i)
        • R(h);N_GUARD::QAR2(C),XR(h)
      • Refutation
        • R(j);XP(K)
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(j);XP(K)::S(G)
        • P(i);XP(I)::S(G)
        • R(j);::S(G)
      • Refutation
        • B(a);
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • K(e);N_GUARD,S_FLIGHT::S(G)
      • K(e);N_GUARD,S_FLIGHT,XP(I)::S(G)
      • R(h);OGATE,XS(J)::QAR2(C),XR(h)
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